From: jochen <jochen@chromium.org>
Date: Tue, 28 Jul 2015 09:29:34 +0000 (-0700)
Subject: Reland of "Remove ExternalArray, derived types, and element kinds"
X-Git-Tag: upstream/4.7.83~1147
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=fded08f6949ac3f673f64d3e36be5d03800660e9;p=platform%2Fupstream%2Fv8.git

Reland of "Remove ExternalArray, derived types, and element kinds"

Original issue's description:
> Remove ExternalArray, derived types, and element kinds
>
> BUG=v8:3996
> R=jarin@chromium.org, mvstanton@chromium.org, bmeurer@chromium.org
> LOG=y
>
> Committed: https://crrev.com/607ef7c6009a24ebf195b4cab7b0b436c5afd21c
> Cr-Commit-Position: refs/heads/master@{#29872}

BUG=v8:3996
R=bmeurer@chromium.org
LOG=y

Review URL: https://codereview.chromium.org/1262583002

Cr-Commit-Position: refs/heads/master@{#29893}
---

diff --git a/include/v8.h b/include/v8.h
index 084d41a..50f0f5f 100644
--- a/include/v8.h
+++ b/include/v8.h
@@ -6946,7 +6946,7 @@ class Internals {
   static const int kNodeIsIndependentShift = 3;
   static const int kNodeIsPartiallyDependentShift = 4;
 
-  static const int kJSObjectType = 0xbf;
+  static const int kJSObjectType = 0xb6;
   static const int kFirstNonstringType = 0x80;
   static const int kOddballType = 0x83;
   static const int kForeignType = 0x87;
diff --git a/src/arm/lithium-arm.cc b/src/arm/lithium-arm.cc
index 946efed..130de10 100644
--- a/src/arm/lithium-arm.cc
+++ b/src/arm/lithium-arm.cc
@@ -2237,7 +2237,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2257,10 +2257,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2295,7 +2294,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
diff --git a/src/arm/lithium-arm.h b/src/arm/lithium-arm.h
index 0f999c5..eea9ece 100644
--- a/src/arm/lithium-arm.h
+++ b/src/arm/lithium-arm.h
@@ -1647,15 +1647,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -2253,13 +2247,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/arm/lithium-codegen-arm.cc b/src/arm/lithium-codegen-arm.cc
index 39df587..d5a3d81 100644
--- a/src/arm/lithium-codegen-arm.cc
+++ b/src/arm/lithium-codegen-arm.cc
@@ -3187,17 +3187,13 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     DwVfpRegister result = ToDoubleRegister(instr->result());
     Operand operand = key_is_constant
         ? Operand(constant_key << element_size_shift)
         : Operand(key, LSL, shift_size);
     __ add(scratch0(), external_pointer, operand);
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ vldr(double_scratch0().low(), scratch0(), base_offset);
       __ vcvt_f64_f32(result, double_scratch0().low());
     } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
@@ -3209,29 +3205,22 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         key, external_pointer, key_is_constant, constant_key,
         element_size_shift, shift_size, base_offset);
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ ldrsb(result, mem_operand);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ ldrb(result, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ ldrsh(result, mem_operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ ldrh(result, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ ldr(result, mem_operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ ldr(result, mem_operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3241,8 +3230,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
       case FAST_HOLEY_SMI_ELEMENTS:
@@ -3352,7 +3339,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4311,10 +4298,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     Register address = scratch0();
     DwVfpRegister value(ToDoubleRegister(instr->value()));
     if (key_is_constant) {
@@ -4327,8 +4311,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
     } else {
       __ add(address, external_pointer, Operand(key, LSL, shift_size));
     }
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ vcvt_f32_f64(double_scratch0().low(), value);
       __ vstr(double_scratch0().low(), address, base_offset);
     } else {  // Storing doubles, not floats.
@@ -4341,30 +4324,21 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
         element_size_shift, shift_size,
         base_offset);
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
       case INT8_ELEMENTS:
         __ strb(value, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ strh(value, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ str(value, mem_operand);
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4470,7 +4444,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases: external, fast double
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/arm64/lithium-arm64.cc b/src/arm64/lithium-arm64.cc
index c432f24..d5c7b4e 100644
--- a/src/arm64/lithium-arm64.cc
+++ b/src/arm64/lithium-arm64.cc
@@ -1728,7 +1728,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* elements = UseRegister(instr->elements());
   LOperand* key = UseRegisterOrConstant(instr->key());
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     if (instr->representation().IsDouble()) {
       LOperand* temp = (!instr->key()->IsConstant() ||
                         instr->RequiresHoleCheck())
@@ -1762,8 +1762,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
     LOperand* temp = instr->key()->IsConstant() ? NULL : TempRegister();
     LInstruction* result = DefineAsRegister(
         new(zone()) LLoadKeyedExternal(elements, key, temp));
-    if ((elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-         elements_kind == UINT32_ELEMENTS) &&
+    if (elements_kind == UINT32_ELEMENTS &&
         !instr->CheckFlag(HInstruction::kUint32)) {
       result = AssignEnvironment(result);
     }
@@ -2367,7 +2366,7 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
   LOperand* elements = NULL;
   LOperand* val = NULL;
 
-  if (!instr->is_typed_elements() &&
+  if (!instr->is_fixed_typed_array() &&
       instr->value()->representation().IsTagged() &&
       instr->NeedsWriteBarrier()) {
     // RecordWrite() will clobber all registers.
@@ -2380,7 +2379,7 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
     temp = instr->key()->IsConstant() ? NULL : TempRegister();
   }
 
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DCHECK((instr->value()->representation().IsInteger32() &&
             !IsDoubleOrFloatElementsKind(instr->elements_kind())) ||
            (instr->value()->representation().IsDouble() &&
diff --git a/src/arm64/lithium-codegen-arm64.cc b/src/arm64/lithium-codegen-arm64.cc
index 47dd999..3a2ef8f 100644
--- a/src/arm64/lithium-codegen-arm64.cc
+++ b/src/arm64/lithium-codegen-arm64.cc
@@ -3455,42 +3455,33 @@ void LCodeGen::DoLoadKeyedExternal(LLoadKeyedExternal* instr) {
                                        elements_kind,
                                        instr->base_offset());
 
-  if ((elements_kind == EXTERNAL_FLOAT32_ELEMENTS) ||
-      (elements_kind == FLOAT32_ELEMENTS)) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     DoubleRegister result = ToDoubleRegister(instr->result());
     __ Ldr(result.S(), mem_op);
     __ Fcvt(result, result.S());
-  } else if ((elements_kind == EXTERNAL_FLOAT64_ELEMENTS) ||
-             (elements_kind == FLOAT64_ELEMENTS)) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     DoubleRegister result = ToDoubleRegister(instr->result());
     __ Ldr(result, mem_op);
   } else {
     Register result = ToRegister(instr->result());
 
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ Ldrsb(result, mem_op);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ Ldrb(result, mem_op);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ Ldrsh(result, mem_op);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ Ldrh(result, mem_op);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ Ldrsw(result, mem_op);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ Ldr(result.W(), mem_op);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3501,8 +3492,6 @@ void LCodeGen::DoLoadKeyedExternal(LLoadKeyedExternal* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
       case FAST_HOLEY_SMI_ELEMENTS:
@@ -5177,44 +5166,33 @@ void LCodeGen::DoStoreKeyedExternal(LStoreKeyedExternal* instr) {
                                      elements_kind,
                                      instr->base_offset());
 
-  if ((elements_kind == EXTERNAL_FLOAT32_ELEMENTS) ||
-      (elements_kind == FLOAT32_ELEMENTS)) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     DoubleRegister value = ToDoubleRegister(instr->value());
     DoubleRegister dbl_scratch = double_scratch();
     __ Fcvt(dbl_scratch.S(), value);
     __ Str(dbl_scratch.S(), dst);
-  } else if ((elements_kind == EXTERNAL_FLOAT64_ELEMENTS) ||
-             (elements_kind == FLOAT64_ELEMENTS)) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     DoubleRegister value = ToDoubleRegister(instr->value());
     __ Str(value, dst);
   } else {
     Register value = ToRegister(instr->value());
 
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
       case INT8_ELEMENTS:
         __ Strb(value, dst);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ Strh(value, dst);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ Str(value.W(), dst);
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
diff --git a/src/bootstrapper.cc b/src/bootstrapper.cc
index 1c1f3c7..5f2f9d3 100644
--- a/src/bootstrapper.cc
+++ b/src/bootstrapper.cc
@@ -235,11 +235,8 @@ class Genesis BASE_EMBEDDED {
                                           ElementsKind elements_kind);
   bool InstallNatives(ContextType context_type);
 
-  void InstallTypedArray(
-      const char* name,
-      ElementsKind elements_kind,
-      Handle<JSFunction>* fun,
-      Handle<Map>* external_map);
+  void InstallTypedArray(const char* name, ElementsKind elements_kind,
+                         Handle<JSFunction>* fun);
   bool InstallExperimentalNatives();
   bool InstallExtraNatives();
   void InstallBuiltinFunctionIds();
@@ -1284,17 +1281,12 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
   }
 
   {  // -- T y p e d A r r a y s
-#define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size)                    \
-    {                                                                         \
-      Handle<JSFunction> fun;                                                 \
-      Handle<Map> external_map;                                               \
-      InstallTypedArray(#Type "Array",                                        \
-          TYPE##_ELEMENTS,                                                    \
-          &fun,                                                               \
-          &external_map);                                                     \
-      native_context()->set_##type##_array_fun(*fun);                         \
-      native_context()->set_##type##_array_external_map(*external_map);       \
-    }
+#define INSTALL_TYPED_ARRAY(Type, type, TYPE, ctype, size)   \
+  {                                                          \
+    Handle<JSFunction> fun;                                  \
+    InstallTypedArray(#Type "Array", TYPE##_ELEMENTS, &fun); \
+    native_context()->set_##type##_array_fun(*fun);          \
+  }
     TYPED_ARRAYS(INSTALL_TYPED_ARRAY)
 #undef INSTALL_TYPED_ARRAY
 
@@ -1505,11 +1497,8 @@ void Genesis::InitializeGlobal(Handle<GlobalObject> global_object,
 }
 
 
-void Genesis::InstallTypedArray(
-    const char* name,
-    ElementsKind elements_kind,
-    Handle<JSFunction>* fun,
-    Handle<Map>* external_map) {
+void Genesis::InstallTypedArray(const char* name, ElementsKind elements_kind,
+                                Handle<JSFunction>* fun) {
   Handle<JSObject> global = Handle<JSObject>(native_context()->global_object());
   Handle<JSFunction> result = InstallFunction(
       global, name, JS_TYPED_ARRAY_TYPE, JSTypedArray::kSize,
@@ -1522,9 +1511,6 @@ void Genesis::InstallTypedArray(
   JSFunction::SetInitialMap(result, initial_map,
                             handle(initial_map->prototype(), isolate()));
   *fun = result;
-
-  ElementsKind external_kind = GetNextTransitionElementsKind(elements_kind);
-  *external_map = Map::AsElementsKind(initial_map, external_kind);
 }
 
 
diff --git a/src/code-stubs-hydrogen.cc b/src/code-stubs-hydrogen.cc
index d5addc0..fb46633 100644
--- a/src/code-stubs-hydrogen.cc
+++ b/src/code-stubs-hydrogen.cc
@@ -1987,13 +1987,6 @@ class CodeStubGraphBuilder<KeyedLoadGenericStub>
                             HValue* bit_field2,
                             ElementsKind kind);
 
-  void BuildExternalElementLoad(HGraphBuilder::IfBuilder* if_builder,
-                                HValue* receiver,
-                                HValue* key,
-                                HValue* instance_type,
-                                HValue* bit_field2,
-                                ElementsKind kind);
-
   KeyedLoadGenericStub* casted_stub() {
     return static_cast<KeyedLoadGenericStub*>(stub());
   }
@@ -2015,8 +2008,6 @@ void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildElementsKindLimitCheck(
 void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildFastElementLoad(
     HGraphBuilder::IfBuilder* if_builder, HValue* receiver, HValue* key,
     HValue* instance_type, HValue* bit_field2, ElementsKind kind) {
-  DCHECK(!IsExternalArrayElementsKind(kind));
-
   BuildElementsKindLimitCheck(if_builder, bit_field2, kind);
 
   IfBuilder js_array_check(this);
@@ -2036,20 +2027,6 @@ void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildFastElementLoad(
 }
 
 
-void CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildExternalElementLoad(
-    HGraphBuilder::IfBuilder* if_builder, HValue* receiver, HValue* key,
-    HValue* instance_type, HValue* bit_field2, ElementsKind kind) {
-  DCHECK(IsExternalArrayElementsKind(kind));
-
-  BuildElementsKindLimitCheck(if_builder, bit_field2, kind);
-
-  Push(BuildUncheckedMonomorphicElementAccess(receiver, key, NULL,
-                                              false, kind,
-                                              LOAD, NEVER_RETURN_HOLE,
-                                              STANDARD_STORE));
-}
-
-
 HValue* CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildCodeStub() {
   HValue* receiver = GetParameter(LoadDescriptor::kReceiverIndex);
   HValue* key = GetParameter(LoadDescriptor::kNameIndex);
@@ -2111,42 +2088,6 @@ HValue* CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildCodeStub() {
                      Deoptimizer::EAGER);
     Push(graph()->GetConstant0());
 
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_INT8_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_UINT8_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_INT16_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_UINT16_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_INT32_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_UINT32_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_FLOAT32_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_FLOAT64_ELEMENTS);
-
-    kind_if.Else();
-    BuildExternalElementLoad(&kind_if, receiver, key, instance_type, bit_field2,
-                             EXTERNAL_UINT8_CLAMPED_ELEMENTS);
-
     kind_if.ElseDeopt(
         Deoptimizer::kElementsKindUnhandledInKeyedLoadGenericStub);
 
@@ -2234,7 +2175,7 @@ HValue* CodeStubGraphBuilder<KeyedLoadGenericStub>::BuildCodeStub() {
             index->ClearFlag(HValue::kCanOverflow);
             HValue* property_index =
                 Add<HLoadKeyed>(cache_field_offsets, index, nullptr,
-                                EXTERNAL_INT32_ELEMENTS, NEVER_RETURN_HOLE, 0);
+                                INT32_ELEMENTS, NEVER_RETURN_HOLE, 0);
             Push(property_index);
           }
           lookup_if->Else();
diff --git a/src/code-stubs.cc b/src/code-stubs.cc
index 877da68..ee57db7 100644
--- a/src/code-stubs.cc
+++ b/src/code-stubs.cc
@@ -807,7 +807,6 @@ void StoreElementStub::Generate(MacroAssembler* masm) {
     case FAST_DOUBLE_ELEMENTS:
     case FAST_HOLEY_DOUBLE_ELEMENTS:
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-    case EXTERNAL_##TYPE##_ELEMENTS:                    \
     case TYPE##_ELEMENTS:
 
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
diff --git a/src/compiler/access-builder.cc b/src/compiler/access-builder.cc
index 2470163..b54982f 100644
--- a/src/compiler/access-builder.cc
+++ b/src/compiler/access-builder.cc
@@ -81,14 +81,6 @@ FieldAccess AccessBuilder::ForFixedArrayLength() {
 
 
 // static
-FieldAccess AccessBuilder::ForExternalArrayPointer() {
-  FieldAccess access = {kTaggedBase, ExternalArray::kExternalPointerOffset,
-                        MaybeHandle<Name>(), Type::UntaggedPointer(), kMachPtr};
-  return access;
-}
-
-
-// static
 FieldAccess AccessBuilder::ForDescriptorArrayEnumCache() {
   FieldAccess access = {kTaggedBase, DescriptorArray::kEnumCacheOffset,
                         Handle<Name>(), Type::TaggedPointer(), kMachAnyTagged};
diff --git a/src/compiler/access-builder.h b/src/compiler/access-builder.h
index 240ffdc..95be3e0 100644
--- a/src/compiler/access-builder.h
+++ b/src/compiler/access-builder.h
@@ -43,9 +43,6 @@ class AccessBuilder final : public AllStatic {
   // Provides access to FixedArray::length() field.
   static FieldAccess ForFixedArrayLength();
 
-  // Provides access to ExternalArray::external_pointer() field.
-  static FieldAccess ForExternalArrayPointer();
-
   // Provides access to DescriptorArray::enum_cache() field.
   static FieldAccess ForDescriptorArrayEnumCache();
 
diff --git a/src/compiler/js-typed-lowering.cc b/src/compiler/js-typed-lowering.cc
index ea1b464..628e7e0 100644
--- a/src/compiler/js-typed-lowering.cc
+++ b/src/compiler/js-typed-lowering.cc
@@ -832,11 +832,10 @@ Reduction JSTypedLowering::ReduceJSLoadProperty(Node* node) {
       size_t const k = ElementSizeLog2Of(access.machine_type());
       double const byte_length = array->byte_length()->Number();
       CHECK_LT(k, arraysize(shifted_int32_ranges_));
-      if (IsExternalArrayElementsKind(array->map()->elements_kind()) &&
-          key_type->Is(shifted_int32_ranges_[k]) && byte_length <= kMaxInt) {
+      if (key_type->Is(shifted_int32_ranges_[k]) && byte_length <= kMaxInt) {
         // JSLoadProperty(typed-array, int32)
-        Handle<ExternalArray> elements =
-            Handle<ExternalArray>::cast(handle(array->elements()));
+        Handle<FixedTypedArrayBase> elements =
+            Handle<FixedTypedArrayBase>::cast(handle(array->elements()));
         Node* buffer = jsgraph()->PointerConstant(elements->external_pointer());
         Node* length = jsgraph()->Constant(byte_length);
         Node* effect = NodeProperties::GetEffectInput(node);
@@ -879,12 +878,11 @@ Reduction JSTypedLowering::ReduceJSStoreProperty(Node* node) {
       size_t const k = ElementSizeLog2Of(access.machine_type());
       double const byte_length = array->byte_length()->Number();
       CHECK_LT(k, arraysize(shifted_int32_ranges_));
-      if (IsExternalArrayElementsKind(array->map()->elements_kind()) &&
-          access.external_array_type() != kExternalUint8ClampedArray &&
+      if (access.external_array_type() != kExternalUint8ClampedArray &&
           key_type->Is(shifted_int32_ranges_[k]) && byte_length <= kMaxInt) {
         // JSLoadProperty(typed-array, int32)
-        Handle<ExternalArray> elements =
-            Handle<ExternalArray>::cast(handle(array->elements()));
+        Handle<FixedTypedArrayBase> elements =
+            Handle<FixedTypedArrayBase>::cast(handle(array->elements()));
         Node* buffer = jsgraph()->PointerConstant(elements->external_pointer());
         Node* length = jsgraph()->Constant(byte_length);
         Node* context = NodeProperties::GetContextInput(node);
diff --git a/src/contexts.h b/src/contexts.h
index fc29831..37fc315 100644
--- a/src/contexts.h
+++ b/src/contexts.h
@@ -115,16 +115,6 @@ enum BindingFlags {
   V(FLOAT32_ARRAY_FUN_INDEX, JSFunction, float32_array_fun)                    \
   V(FLOAT64_ARRAY_FUN_INDEX, JSFunction, float64_array_fun)                    \
   V(UINT8_CLAMPED_ARRAY_FUN_INDEX, JSFunction, uint8_clamped_array_fun)        \
-  V(INT8_ARRAY_EXTERNAL_MAP_INDEX, Map, int8_array_external_map)               \
-  V(UINT8_ARRAY_EXTERNAL_MAP_INDEX, Map, uint8_array_external_map)             \
-  V(INT16_ARRAY_EXTERNAL_MAP_INDEX, Map, int16_array_external_map)             \
-  V(UINT16_ARRAY_EXTERNAL_MAP_INDEX, Map, uint16_array_external_map)           \
-  V(INT32_ARRAY_EXTERNAL_MAP_INDEX, Map, int32_array_external_map)             \
-  V(UINT32_ARRAY_EXTERNAL_MAP_INDEX, Map, uint32_array_external_map)           \
-  V(FLOAT32_ARRAY_EXTERNAL_MAP_INDEX, Map, float32_array_external_map)         \
-  V(FLOAT64_ARRAY_EXTERNAL_MAP_INDEX, Map, float64_array_external_map)         \
-  V(UINT8_CLAMPED_ARRAY_EXTERNAL_MAP_INDEX, Map,                               \
-    uint8_clamped_array_external_map)                                          \
   V(DATA_VIEW_FUN_INDEX, JSFunction, data_view_fun)                            \
   V(SLOPPY_FUNCTION_MAP_INDEX, Map, sloppy_function_map)                       \
   V(SLOPPY_FUNCTION_WITH_READONLY_PROTOTYPE_MAP_INDEX, Map,                    \
diff --git a/src/elements-kind.cc b/src/elements-kind.cc
index 07d2837..0d29c30 100644
--- a/src/elements-kind.cc
+++ b/src/elements-kind.cc
@@ -15,26 +15,17 @@ namespace internal {
 
 int ElementsKindToShiftSize(ElementsKind elements_kind) {
   switch (elements_kind) {
-    case EXTERNAL_INT8_ELEMENTS:
-    case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-    case EXTERNAL_UINT8_ELEMENTS:
     case UINT8_ELEMENTS:
     case INT8_ELEMENTS:
     case UINT8_CLAMPED_ELEMENTS:
       return 0;
-    case EXTERNAL_INT16_ELEMENTS:
-    case EXTERNAL_UINT16_ELEMENTS:
     case UINT16_ELEMENTS:
     case INT16_ELEMENTS:
       return 1;
-    case EXTERNAL_INT32_ELEMENTS:
-    case EXTERNAL_UINT32_ELEMENTS:
-    case EXTERNAL_FLOAT32_ELEMENTS:
     case UINT32_ELEMENTS:
     case INT32_ELEMENTS:
     case FLOAT32_ELEMENTS:
       return 2;
-    case EXTERNAL_FLOAT64_ELEMENTS:
     case FAST_DOUBLE_ELEMENTS:
     case FAST_HOLEY_DOUBLE_ELEMENTS:
     case FLOAT64_ELEMENTS:
@@ -53,16 +44,10 @@ int ElementsKindToShiftSize(ElementsKind elements_kind) {
 }
 
 
-static bool IsTypedArrayElementsKind(ElementsKind elements_kind) {
-  return IsFixedTypedArrayElementsKind(elements_kind) ||
-         IsExternalArrayElementsKind(elements_kind);
-}
-
-
 int GetDefaultHeaderSizeForElementsKind(ElementsKind elements_kind) {
   STATIC_ASSERT(FixedArray::kHeaderSize == FixedDoubleArray::kHeaderSize);
 
-  if (IsTypedArrayElementsKind(elements_kind)) {
+  if (IsFixedTypedArrayElementsKind(elements_kind)) {
     return 0;
   } else {
     return FixedArray::kHeaderSize - kHeapObjectTag;
@@ -125,17 +110,8 @@ int GetSequenceIndexFromFastElementsKind(ElementsKind elements_kind) {
 
 
 ElementsKind GetNextTransitionElementsKind(ElementsKind kind) {
-  switch (kind) {
-#define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-    case TYPE##_ELEMENTS: return EXTERNAL_##TYPE##_ELEMENTS;
-
-    TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE)
-#undef FIXED_TYPED_ARRAY_CASE
-    default: {
-      int index = GetSequenceIndexFromFastElementsKind(kind);
-      return GetFastElementsKindFromSequenceIndex(index + 1);
-    }
-  }
+  int index = GetSequenceIndexFromFastElementsKind(kind);
+  return GetFastElementsKindFromSequenceIndex(index + 1);
 }
 
 
@@ -146,18 +122,9 @@ static inline bool IsFastTransitionTarget(ElementsKind elements_kind) {
 
 bool IsMoreGeneralElementsKindTransition(ElementsKind from_kind,
                                          ElementsKind to_kind) {
-  if (IsTypedArrayElementsKind(from_kind) ||
-      IsTypedArrayElementsKind(to_kind)) {
-    switch (from_kind) {
-#define FIXED_TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-      case TYPE##_ELEMENTS:                                   \
-        return to_kind == EXTERNAL_##TYPE##_ELEMENTS;
-
-      TYPED_ARRAYS(FIXED_TYPED_ARRAY_CASE);
-#undef FIXED_TYPED_ARRAY_CASE
-      default:
-        return false;
-    }
+  if (IsFixedTypedArrayElementsKind(from_kind) ||
+      IsFixedTypedArrayElementsKind(to_kind)) {
+    return false;
   }
   if (IsFastElementsKind(from_kind) && IsFastTransitionTarget(to_kind)) {
     switch (from_kind) {
diff --git a/src/elements-kind.h b/src/elements-kind.h
index c3184b9..0254a4f 100644
--- a/src/elements-kind.h
+++ b/src/elements-kind.h
@@ -33,17 +33,6 @@ enum ElementsKind {
   FAST_SLOPPY_ARGUMENTS_ELEMENTS,
   SLOW_SLOPPY_ARGUMENTS_ELEMENTS,
 
-  // The "fast" kind for external arrays
-  EXTERNAL_INT8_ELEMENTS,
-  EXTERNAL_UINT8_ELEMENTS,
-  EXTERNAL_INT16_ELEMENTS,
-  EXTERNAL_UINT16_ELEMENTS,
-  EXTERNAL_INT32_ELEMENTS,
-  EXTERNAL_UINT32_ELEMENTS,
-  EXTERNAL_FLOAT32_ELEMENTS,
-  EXTERNAL_FLOAT64_ELEMENTS,
-  EXTERNAL_UINT8_CLAMPED_ELEMENTS,
-
   // Fixed typed arrays
   UINT8_ELEMENTS,
   INT8_ELEMENTS,
@@ -60,8 +49,6 @@ enum ElementsKind {
   LAST_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   FIRST_FAST_ELEMENTS_KIND = FAST_SMI_ELEMENTS,
   LAST_FAST_ELEMENTS_KIND = FAST_HOLEY_DOUBLE_ELEMENTS,
-  FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_INT8_ELEMENTS,
-  LAST_EXTERNAL_ARRAY_ELEMENTS_KIND = EXTERNAL_UINT8_CLAMPED_ELEMENTS,
   FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_ELEMENTS,
   LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND = UINT8_CLAMPED_ELEMENTS,
   TERMINAL_FAST_ELEMENTS_KIND = FAST_HOLEY_ELEMENTS
@@ -97,21 +84,15 @@ inline bool IsSloppyArgumentsElements(ElementsKind kind) {
 }
 
 
-inline bool IsExternalArrayElementsKind(ElementsKind kind) {
-  return kind >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
-      kind <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND;
+inline bool IsFixedTypedArrayElementsKind(ElementsKind kind) {
+  return kind >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
+         kind <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
 }
 
 
 inline bool IsTerminalElementsKind(ElementsKind kind) {
   return kind == TERMINAL_FAST_ELEMENTS_KIND ||
-      IsExternalArrayElementsKind(kind);
-}
-
-
-inline bool IsFixedTypedArrayElementsKind(ElementsKind kind) {
-  return kind >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
-      kind <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
+         IsFixedTypedArrayElementsKind(kind);
 }
 
 
@@ -133,21 +114,13 @@ inline bool IsFastDoubleElementsKind(ElementsKind kind) {
 }
 
 
-inline bool IsExternalFloatOrDoubleElementsKind(ElementsKind kind) {
-  return kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      kind == EXTERNAL_FLOAT32_ELEMENTS;
-}
-
-
 inline bool IsFixedFloatElementsKind(ElementsKind kind) {
   return kind == FLOAT32_ELEMENTS || kind == FLOAT64_ELEMENTS;
 }
 
 
 inline bool IsDoubleOrFloatElementsKind(ElementsKind kind) {
-  return IsFastDoubleElementsKind(kind) ||
-      IsExternalFloatOrDoubleElementsKind(kind) ||
-      IsFixedFloatElementsKind(kind);
+  return IsFastDoubleElementsKind(kind) || IsFixedFloatElementsKind(kind);
 }
 
 
diff --git a/src/elements.cc b/src/elements.cc
index d1ddc8d..7ef13b3 100644
--- a/src/elements.cc
+++ b/src/elements.cc
@@ -27,15 +27,6 @@
 //       - FastPackedDoubleElementsAccessor
 //       - FastHoleyDoubleElementsAccessor
 //   - TypedElementsAccessor: template, with instantiations:
-//     - ExternalInt8ElementsAccessor
-//     - ExternalUint8ElementsAccessor
-//     - ExternalInt16ElementsAccessor
-//     - ExternalUint16ElementsAccessor
-//     - ExternalInt32ElementsAccessor
-//     - ExternalUint32ElementsAccessor
-//     - ExternalFloat32ElementsAccessor
-//     - ExternalFloat64ElementsAccessor
-//     - ExternalUint8ClampedElementsAccessor
 //     - FixedUint8ElementsAccessor
 //     - FixedInt8ElementsAccessor
 //     - FixedUint16ElementsAccessor
@@ -79,23 +70,6 @@ static const int kPackedSizeNotKnown = -1;
     FixedArray)                                                               \
   V(SlowSloppyArgumentsElementsAccessor, SLOW_SLOPPY_ARGUMENTS_ELEMENTS,      \
     FixedArray)                                                               \
-  V(ExternalInt8ElementsAccessor, EXTERNAL_INT8_ELEMENTS, ExternalInt8Array)  \
-  V(ExternalUint8ElementsAccessor, EXTERNAL_UINT8_ELEMENTS,                   \
-    ExternalUint8Array)                                                       \
-  V(ExternalInt16ElementsAccessor, EXTERNAL_INT16_ELEMENTS,                   \
-    ExternalInt16Array)                                                       \
-  V(ExternalUint16ElementsAccessor, EXTERNAL_UINT16_ELEMENTS,                 \
-    ExternalUint16Array)                                                      \
-  V(ExternalInt32ElementsAccessor, EXTERNAL_INT32_ELEMENTS,                   \
-    ExternalInt32Array)                                                       \
-  V(ExternalUint32ElementsAccessor, EXTERNAL_UINT32_ELEMENTS,                 \
-    ExternalUint32Array)                                                      \
-  V(ExternalFloat32ElementsAccessor, EXTERNAL_FLOAT32_ELEMENTS,               \
-    ExternalFloat32Array)                                                     \
-  V(ExternalFloat64ElementsAccessor, EXTERNAL_FLOAT64_ELEMENTS,               \
-    ExternalFloat64Array)                                                     \
-  V(ExternalUint8ClampedElementsAccessor, EXTERNAL_UINT8_CLAMPED_ELEMENTS,    \
-    ExternalUint8ClampedArray)                                                \
   V(FixedUint8ElementsAccessor, UINT8_ELEMENTS, FixedUint8Array)              \
   V(FixedInt8ElementsAccessor, INT8_ELEMENTS, FixedInt8Array)                 \
   V(FixedUint16ElementsAccessor, UINT16_ELEMENTS, FixedUint16Array)           \
@@ -1218,7 +1192,6 @@ class FastSmiOrObjectElementsAccessor
       case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
         UNREACHABLE();
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
-      case EXTERNAL_##TYPE##_ELEMENTS:                                        \
       case TYPE##_ELEMENTS:                                                   \
         UNREACHABLE();
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -1315,7 +1288,6 @@ class FastDoubleElementsAccessor
         UNREACHABLE();
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
-      case EXTERNAL_##TYPE##_ELEMENTS:                                        \
       case TYPE##_ELEMENTS:                                                   \
         UNREACHABLE();
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -1406,13 +1378,6 @@ class TypedElementsAccessor
 
 
 
-#define EXTERNAL_ELEMENTS_ACCESSOR(Type, type, TYPE, ctype, size)    \
-  typedef TypedElementsAccessor<EXTERNAL_##TYPE##_ELEMENTS>          \
-      External##Type##ElementsAccessor;
-
-TYPED_ARRAYS(EXTERNAL_ELEMENTS_ACCESSOR)
-#undef EXTERNAL_ELEMENTS_ACCESSOR
-
 #define FIXED_ELEMENTS_ACCESSOR(Type, type, TYPE, ctype, size)       \
   typedef TypedElementsAccessor<TYPE##_ELEMENTS >                    \
       Fixed##Type##ElementsAccessor;
diff --git a/src/factory.cc b/src/factory.cc
index e2a5e05..1d594d3 100644
--- a/src/factory.cc
+++ b/src/factory.cc
@@ -883,18 +883,14 @@ Handle<BytecodeArray> Factory::NewBytecodeArray(int length,
 }
 
 
-Handle<ExternalArray> Factory::NewExternalArray(int length,
-                                                ExternalArrayType array_type,
-                                                void* external_pointer,
-                                                PretenureFlag pretenure) {
+Handle<FixedTypedArrayBase> Factory::NewFixedTypedArrayWithExternalPointer(
+    int length, ExternalArrayType array_type, void* external_pointer,
+    PretenureFlag pretenure) {
   DCHECK(0 <= length && length <= Smi::kMaxValue);
   CALL_HEAP_FUNCTION(
-      isolate(),
-      isolate()->heap()->AllocateExternalArray(length,
-                                               array_type,
-                                               external_pointer,
-                                               pretenure),
-      ExternalArray);
+      isolate(), isolate()->heap()->AllocateFixedTypedArrayWithExternalPointer(
+                     length, array_type, external_pointer, pretenure),
+      FixedTypedArrayBase);
 }
 
 
@@ -1765,11 +1761,11 @@ ElementsKind GetExternalArrayElementsKind(ExternalArrayType type) {
   switch (type) {
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
   case kExternal##Type##Array:                          \
-    return EXTERNAL_##TYPE##_ELEMENTS;
+    return TYPE##_ELEMENTS;
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
   }
   UNREACHABLE();
-  return FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND;
+  return FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND;
 #undef TYPED_ARRAY_CASE
 }
 
@@ -1911,7 +1907,7 @@ Handle<JSTypedArray> Factory::NewJSTypedArray(ExternalArrayType type,
   Handle<Object> length_object = NewNumberFromSize(length);
   obj->set_length(*length_object);
 
-  Handle<ExternalArray> elements = NewExternalArray(
+  Handle<FixedTypedArrayBase> elements = NewFixedTypedArrayWithExternalPointer(
       static_cast<int>(length), type,
       static_cast<uint8_t*>(buffer->backing_store()) + byte_offset);
   Handle<Map> map = JSObject::GetElementsTransitionMap(obj, elements_kind);
diff --git a/src/factory.h b/src/factory.h
index 1253779..9d42130 100644
--- a/src/factory.h
+++ b/src/factory.h
@@ -286,10 +286,8 @@ class Factory final {
   Handle<BytecodeArray> NewBytecodeArray(int length, const byte* raw_bytecodes,
                                          int frame_size);
 
-  Handle<ExternalArray> NewExternalArray(
-      int length,
-      ExternalArrayType array_type,
-      void* external_pointer,
+  Handle<FixedTypedArrayBase> NewFixedTypedArrayWithExternalPointer(
+      int length, ExternalArrayType array_type, void* external_pointer,
       PretenureFlag pretenure = NOT_TENURED);
 
   Handle<FixedTypedArrayBase> NewFixedTypedArray(
diff --git a/src/heap-snapshot-generator.cc b/src/heap-snapshot-generator.cc
index 63916a2..34936fb 100644
--- a/src/heap-snapshot-generator.cc
+++ b/src/heap-snapshot-generator.cc
@@ -856,10 +856,8 @@ HeapEntry* V8HeapExplorer::AddEntry(HeapObject* object) {
     return AddEntry(object, HeapEntry::kHidden, "system / NativeContext");
   } else if (object->IsContext()) {
     return AddEntry(object, HeapEntry::kObject, "system / Context");
-  } else if (object->IsFixedArray() ||
-             object->IsFixedDoubleArray() ||
-             object->IsByteArray() ||
-             object->IsExternalArray()) {
+  } else if (object->IsFixedArray() || object->IsFixedDoubleArray() ||
+             object->IsByteArray()) {
     return AddEntry(object, HeapEntry::kArray, "");
   } else if (object->IsHeapNumber()) {
     return AddEntry(object, HeapEntry::kHeapNumber, "number");
diff --git a/src/heap/heap.cc b/src/heap/heap.cc
index 80b28d1..b75c6f7 100644
--- a/src/heap/heap.cc
+++ b/src/heap/heap.cc
@@ -2500,7 +2500,8 @@ class ScavengingVisitor : public StaticVisitorBase {
     DCHECK(map_word.IsForwardingAddress());
     FixedTypedArrayBase* target =
         reinterpret_cast<FixedTypedArrayBase*>(map_word.ToForwardingAddress());
-    target->set_base_pointer(target, SKIP_WRITE_BARRIER);
+    if (target->base_pointer() != Smi::FromInt(0))
+      target->set_base_pointer(target, SKIP_WRITE_BARRIER);
   }
 
 
@@ -2513,7 +2514,8 @@ class ScavengingVisitor : public StaticVisitorBase {
     DCHECK(map_word.IsForwardingAddress());
     FixedTypedArrayBase* target =
         reinterpret_cast<FixedTypedArrayBase*>(map_word.ToForwardingAddress());
-    target->set_base_pointer(target, SKIP_WRITE_BARRIER);
+    if (target->base_pointer() != Smi::FromInt(0))
+      target->set_base_pointer(target, SKIP_WRITE_BARRIER);
   }
 
 
@@ -3004,13 +3006,6 @@ bool Heap::CreateInitialMaps() {
     ALLOCATE_VARSIZE_MAP(BYTECODE_ARRAY_TYPE, bytecode_array)
     ALLOCATE_VARSIZE_MAP(FREE_SPACE_TYPE, free_space)
 
-#define ALLOCATE_EXTERNAL_ARRAY_MAP(Type, type, TYPE, ctype, size) \
-  ALLOCATE_MAP(EXTERNAL_##TYPE##_ARRAY_TYPE, ExternalArray::kSize, \
-               external_##type##_array)
-
-    TYPED_ARRAYS(ALLOCATE_EXTERNAL_ARRAY_MAP)
-#undef ALLOCATE_EXTERNAL_ARRAY_MAP
-
 #define ALLOCATE_FIXED_TYPED_ARRAY_MAP(Type, type, TYPE, ctype, size) \
   ALLOCATE_VARSIZE_MAP(FIXED_##TYPE##_ARRAY_TYPE, fixed_##type##_array)
 
@@ -3076,17 +3071,6 @@ bool Heap::CreateInitialMaps() {
       set_empty_bytecode_array(bytecode_array);
     }
 
-#define ALLOCATE_EMPTY_EXTERNAL_ARRAY(Type, type, TYPE, ctype, size)  \
-  {                                                                   \
-    ExternalArray* obj;                                               \
-    if (!AllocateEmptyExternalArray(kExternal##Type##Array).To(&obj)) \
-      return false;                                                   \
-    set_empty_external_##type##_array(obj);                           \
-  }
-
-    TYPED_ARRAYS(ALLOCATE_EMPTY_EXTERNAL_ARRAY)
-#undef ALLOCATE_EMPTY_EXTERNAL_ARRAY
-
 #define ALLOCATE_EMPTY_FIXED_TYPED_ARRAY(Type, type, TYPE, ctype, size) \
   {                                                                     \
     FixedTypedArrayBase* obj;                                           \
@@ -3702,27 +3686,6 @@ void Heap::AddAllocationSiteToScratchpad(AllocationSite* site,
 }
 
 
-Map* Heap::MapForExternalArrayType(ExternalArrayType array_type) {
-  return Map::cast(roots_[RootIndexForExternalArrayType(array_type)]);
-}
-
-
-Heap::RootListIndex Heap::RootIndexForExternalArrayType(
-    ExternalArrayType array_type) {
-  switch (array_type) {
-#define ARRAY_TYPE_TO_ROOT_INDEX(Type, type, TYPE, ctype, size) \
-  case kExternal##Type##Array:                                  \
-    return kExternal##Type##ArrayMapRootIndex;
-
-    TYPED_ARRAYS(ARRAY_TYPE_TO_ROOT_INDEX)
-#undef ARRAY_TYPE_TO_ROOT_INDEX
-
-    default:
-      UNREACHABLE();
-      return kUndefinedValueRootIndex;
-  }
-}
-
 
 Map* Heap::MapForFixedTypedArray(ExternalArrayType array_type) {
   return Map::cast(roots_[RootIndexForFixedTypedArray(array_type)]);
@@ -3746,23 +3709,6 @@ Heap::RootListIndex Heap::RootIndexForFixedTypedArray(
 }
 
 
-Heap::RootListIndex Heap::RootIndexForEmptyExternalArray(
-    ElementsKind elementsKind) {
-  switch (elementsKind) {
-#define ELEMENT_KIND_TO_ROOT_INDEX(Type, type, TYPE, ctype, size) \
-  case EXTERNAL_##TYPE##_ELEMENTS:                                \
-    return kEmptyExternal##Type##ArrayRootIndex;
-
-    TYPED_ARRAYS(ELEMENT_KIND_TO_ROOT_INDEX)
-#undef ELEMENT_KIND_TO_ROOT_INDEX
-
-    default:
-      UNREACHABLE();
-      return kUndefinedValueRootIndex;
-  }
-}
-
-
 Heap::RootListIndex Heap::RootIndexForEmptyFixedTypedArray(
     ElementsKind elementsKind) {
   switch (elementsKind) {
@@ -3779,12 +3725,6 @@ Heap::RootListIndex Heap::RootIndexForEmptyFixedTypedArray(
 }
 
 
-ExternalArray* Heap::EmptyExternalArrayForMap(Map* map) {
-  return ExternalArray::cast(
-      roots_[RootIndexForEmptyExternalArray(map->elements_kind())]);
-}
-
-
 FixedTypedArrayBase* Heap::EmptyFixedTypedArrayForMap(Map* map) {
   return FixedTypedArrayBase::cast(
       roots_[RootIndexForEmptyFixedTypedArray(map->elements_kind())]);
@@ -4005,11 +3945,10 @@ void Heap::RightTrimFixedArray(FixedArrayBase* object, int elements_to_trim) {
 }
 
 
-AllocationResult Heap::AllocateExternalArray(int length,
-                                             ExternalArrayType array_type,
-                                             void* external_pointer,
-                                             PretenureFlag pretenure) {
-  int size = ExternalArray::kSize;
+AllocationResult Heap::AllocateFixedTypedArrayWithExternalPointer(
+    int length, ExternalArrayType array_type, void* external_pointer,
+    PretenureFlag pretenure) {
+  int size = FixedTypedArrayBase::kHeaderSize;
   AllocationSpace space = SelectSpace(size, pretenure);
   HeapObject* result;
   {
@@ -4017,10 +3956,12 @@ AllocationResult Heap::AllocateExternalArray(int length,
     if (!allocation.To(&result)) return allocation;
   }
 
-  result->set_map_no_write_barrier(MapForExternalArrayType(array_type));
-  ExternalArray::cast(result)->set_length(length);
-  ExternalArray::cast(result)->set_external_pointer(external_pointer);
-  return result;
+  result->set_map_no_write_barrier(MapForFixedTypedArray(array_type));
+  FixedTypedArrayBase* elements = FixedTypedArrayBase::cast(result);
+  elements->set_base_pointer(Smi::FromInt(0), SKIP_WRITE_BARRIER);
+  elements->set_external_pointer(external_pointer, SKIP_WRITE_BARRIER);
+  elements->set_length(length);
+  return elements;
 }
 
 static void ForFixedTypedArray(ExternalArrayType array_type, int* element_size,
@@ -4060,7 +4001,7 @@ AllocationResult Heap::AllocateFixedTypedArray(int length,
       array_type == kExternalFloat64Array ? kDoubleAligned : kWordAligned);
   if (!allocation.To(&object)) return allocation;
 
-  object->set_map(MapForFixedTypedArray(array_type));
+  object->set_map_no_write_barrier(MapForFixedTypedArray(array_type));
   FixedTypedArrayBase* elements = FixedTypedArrayBase::cast(object);
   elements->set_base_pointer(elements, SKIP_WRITE_BARRIER);
   elements->set_external_pointer(
@@ -4275,8 +4216,7 @@ AllocationResult Heap::AllocateJSObjectFromMap(
 
   // Initialize the JSObject.
   InitializeJSObjectFromMap(js_obj, properties, map);
-  DCHECK(js_obj->HasFastElements() || js_obj->HasExternalArrayElements() ||
-         js_obj->HasFixedTypedArrayElements());
+  DCHECK(js_obj->HasFastElements() || js_obj->HasFixedTypedArrayElements());
   return js_obj;
 }
 
@@ -4568,12 +4508,6 @@ AllocationResult Heap::AllocateEmptyFixedArray() {
 }
 
 
-AllocationResult Heap::AllocateEmptyExternalArray(
-    ExternalArrayType array_type) {
-  return AllocateExternalArray(0, array_type, NULL, TENURED);
-}
-
-
 AllocationResult Heap::CopyAndTenureFixedCOWArray(FixedArray* src) {
   if (!InNewSpace(src)) {
     return src;
diff --git a/src/heap/heap.h b/src/heap/heap.h
index edc3d2c..15577ee 100644
--- a/src/heap/heap.h
+++ b/src/heap/heap.h
@@ -105,25 +105,6 @@ namespace internal {
   V(Map, short_external_one_byte_internalized_string_map,                      \
     ShortExternalOneByteInternalizedStringMap)                                 \
   V(Map, short_external_one_byte_string_map, ShortExternalOneByteStringMap)    \
-  V(Map, external_int8_array_map, ExternalInt8ArrayMap)                        \
-  V(Map, external_uint8_array_map, ExternalUint8ArrayMap)                      \
-  V(Map, external_int16_array_map, ExternalInt16ArrayMap)                      \
-  V(Map, external_uint16_array_map, ExternalUint16ArrayMap)                    \
-  V(Map, external_int32_array_map, ExternalInt32ArrayMap)                      \
-  V(Map, external_uint32_array_map, ExternalUint32ArrayMap)                    \
-  V(Map, external_float32_array_map, ExternalFloat32ArrayMap)                  \
-  V(Map, external_float64_array_map, ExternalFloat64ArrayMap)                  \
-  V(Map, external_uint8_clamped_array_map, ExternalUint8ClampedArrayMap)       \
-  V(ExternalArray, empty_external_int8_array, EmptyExternalInt8Array)          \
-  V(ExternalArray, empty_external_uint8_array, EmptyExternalUint8Array)        \
-  V(ExternalArray, empty_external_int16_array, EmptyExternalInt16Array)        \
-  V(ExternalArray, empty_external_uint16_array, EmptyExternalUint16Array)      \
-  V(ExternalArray, empty_external_int32_array, EmptyExternalInt32Array)        \
-  V(ExternalArray, empty_external_uint32_array, EmptyExternalUint32Array)      \
-  V(ExternalArray, empty_external_float32_array, EmptyExternalFloat32Array)    \
-  V(ExternalArray, empty_external_float64_array, EmptyExternalFloat64Array)    \
-  V(ExternalArray, empty_external_uint8_clamped_array,                         \
-    EmptyExternalUint8ClampedArray)                                            \
   V(Map, fixed_uint8_array_map, FixedUint8ArrayMap)                            \
   V(Map, fixed_int8_array_map, FixedInt8ArrayMap)                              \
   V(Map, fixed_uint16_array_map, FixedUint16ArrayMap)                          \
@@ -1269,12 +1250,7 @@ class Heap {
   Map* MapForFixedTypedArray(ExternalArrayType array_type);
   RootListIndex RootIndexForFixedTypedArray(ExternalArrayType array_type);
 
-  Map* MapForExternalArrayType(ExternalArrayType array_type);
-  RootListIndex RootIndexForExternalArrayType(ExternalArrayType array_type);
-
-  RootListIndex RootIndexForEmptyExternalArray(ElementsKind kind);
   RootListIndex RootIndexForEmptyFixedTypedArray(ElementsKind kind);
-  ExternalArray* EmptyExternalArrayForMap(Map* map);
   FixedTypedArrayBase* EmptyFixedTypedArrayForMap(Map* map);
 
   void RecordStats(HeapStats* stats, bool take_snapshot = false);
@@ -2046,9 +2022,9 @@ class Heap {
   MUST_USE_RESULT AllocationResult AllocateSymbol();
 
   // Allocates an external array of the specified length and type.
-  MUST_USE_RESULT AllocationResult
-      AllocateExternalArray(int length, ExternalArrayType array_type,
-                            void* external_pointer, PretenureFlag pretenure);
+  MUST_USE_RESULT AllocationResult AllocateFixedTypedArrayWithExternalPointer(
+      int length, ExternalArrayType array_type, void* external_pointer,
+      PretenureFlag pretenure);
 
   // Allocates a fixed typed array of the specified length and type.
   MUST_USE_RESULT AllocationResult
@@ -2076,10 +2052,6 @@ class Heap {
   // Allocate empty fixed array.
   MUST_USE_RESULT AllocationResult AllocateEmptyFixedArray();
 
-  // Allocate empty external array of given type.
-  MUST_USE_RESULT AllocationResult
-      AllocateEmptyExternalArray(ExternalArrayType array_type);
-
   // Allocate empty fixed typed array of given type.
   MUST_USE_RESULT AllocationResult
       AllocateEmptyFixedTypedArray(ExternalArrayType array_type);
diff --git a/src/heap/objects-visiting.cc b/src/heap/objects-visiting.cc
index 8de0da9..70f26a5 100644
--- a/src/heap/objects-visiting.cc
+++ b/src/heap/objects-visiting.cc
@@ -139,13 +139,8 @@ StaticVisitorBase::VisitorId StaticVisitorBase::GetVisitorId(
     case HEAP_NUMBER_TYPE:
     case MUTABLE_HEAP_NUMBER_TYPE:
     case FLOAT32X4_TYPE:
-#define EXTERNAL_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-  case EXTERNAL_##TYPE##_ARRAY_TYPE:
-
-      TYPED_ARRAYS(EXTERNAL_ARRAY_CASE)
       return GetVisitorIdForSize(kVisitDataObject, kVisitDataObjectGeneric,
                                  instance_size, has_unboxed_fields);
-#undef EXTERNAL_ARRAY_CASE
 
     case FIXED_UINT8_ARRAY_TYPE:
     case FIXED_INT8_ARRAY_TYPE:
diff --git a/src/hydrogen-instructions.cc b/src/hydrogen-instructions.cc
index b729985..2586da9 100644
--- a/src/hydrogen-instructions.cc
+++ b/src/hydrogen-instructions.cc
@@ -3207,18 +3207,13 @@ Range* HLoadNamedField::InferRange(Zone* zone) {
 
 Range* HLoadKeyed::InferRange(Zone* zone) {
   switch (elements_kind()) {
-    case EXTERNAL_INT8_ELEMENTS:
     case INT8_ELEMENTS:
       return new(zone) Range(kMinInt8, kMaxInt8);
-    case EXTERNAL_UINT8_ELEMENTS:
-    case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
     case UINT8_ELEMENTS:
     case UINT8_CLAMPED_ELEMENTS:
       return new(zone) Range(kMinUInt8, kMaxUInt8);
-    case EXTERNAL_INT16_ELEMENTS:
     case INT16_ELEMENTS:
       return new(zone) Range(kMinInt16, kMaxInt16);
-    case EXTERNAL_UINT16_ELEMENTS:
     case UINT16_ELEMENTS:
       return new(zone) Range(kMinUInt16, kMaxUInt16);
     default:
@@ -3461,11 +3456,11 @@ std::ostream& HLoadNamedGeneric::PrintDataTo(
 
 
 std::ostream& HLoadKeyed::PrintDataTo(std::ostream& os) const {  // NOLINT
-  if (!is_external()) {
+  if (!is_fixed_typed_array()) {
     os << NameOf(elements());
   } else {
-    DCHECK(elements_kind() >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
-           elements_kind() <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND);
+    DCHECK(elements_kind() >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
+           elements_kind() <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND);
     os << NameOf(elements()) << "." << ElementsKindToString(elements_kind());
   }
 
@@ -3500,7 +3495,7 @@ bool HLoadKeyed::UsesMustHandleHole() const {
     return false;
   }
 
-  if (IsExternalArrayElementsKind(elements_kind())) {
+  if (IsFixedTypedArrayElementsKind(elements_kind())) {
     return false;
   }
 
@@ -3540,7 +3535,7 @@ bool HLoadKeyed::RequiresHoleCheck() const {
     return false;
   }
 
-  if (IsExternalArrayElementsKind(elements_kind())) {
+  if (IsFixedTypedArrayElementsKind(elements_kind())) {
     return false;
   }
 
@@ -3615,11 +3610,11 @@ std::ostream& HStoreNamedField::PrintDataTo(std::ostream& os) const {  // NOLINT
 
 
 std::ostream& HStoreKeyed::PrintDataTo(std::ostream& os) const {  // NOLINT
-  if (!is_external()) {
+  if (!is_fixed_typed_array()) {
     os << NameOf(elements());
   } else {
-    DCHECK(elements_kind() >= FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND &&
-           elements_kind() <= LAST_EXTERNAL_ARRAY_ELEMENTS_KIND);
+    DCHECK(elements_kind() >= FIRST_FIXED_TYPED_ARRAY_ELEMENTS_KIND &&
+           elements_kind() <= LAST_FIXED_TYPED_ARRAY_ELEMENTS_KIND);
     os << NameOf(elements()) << "." << ElementsKindToString(elements_kind());
   }
 
@@ -3982,8 +3977,7 @@ bool HStoreKeyed::NeedsCanonicalization() {
   switch (value()->opcode()) {
     case kLoadKeyed: {
       ElementsKind load_kind = HLoadKeyed::cast(value())->elements_kind();
-      return IsExternalFloatOrDoubleElementsKind(load_kind) ||
-             IsFixedFloatElementsKind(load_kind);
+      return IsFixedFloatElementsKind(load_kind);
     }
     case kChange: {
       Representation from = HChange::cast(value())->from();
diff --git a/src/hydrogen-instructions.h b/src/hydrogen-instructions.h
index 63ddf27..7a2367c 100644
--- a/src/hydrogen-instructions.h
+++ b/src/hydrogen-instructions.h
@@ -6244,11 +6244,6 @@ class HObjectAccess final {
         JSArrayBuffer::kBitFieldSlot, Representation::Smi());
   }
 
-  static HObjectAccess ForExternalArrayExternalPointer() {
-    return HObjectAccess::ForObservableJSObjectOffset(
-        ExternalArray::kExternalPointerOffset, Representation::External());
-  }
-
   static HObjectAccess ForJSArrayBufferViewBuffer() {
     return HObjectAccess::ForObservableJSObjectOffset(
         JSArrayBufferView::kBufferOffset);
@@ -6618,15 +6613,9 @@ class HLoadKeyed final : public HTemplateInstruction<3>,
   DECLARE_INSTRUCTION_FACTORY_P6(HLoadKeyed, HValue*, HValue*, HValue*,
                                  ElementsKind, LoadKeyedHoleMode, int);
 
-  bool is_external() const {
-    return IsExternalArrayElementsKind(elements_kind());
-  }
   bool is_fixed_typed_array() const {
     return IsFixedTypedArrayElementsKind(elements_kind());
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   HValue* elements() const { return OperandAt(0); }
   HValue* key() const { return OperandAt(1); }
   HValue* dependency() const {
@@ -6657,8 +6646,8 @@ class HLoadKeyed final : public HTemplateInstruction<3>,
     // kind_fixed_typed_array:    external[int32] (none)
     // kind_external:             external[int32] (none)
     if (index == 0) {
-      return is_typed_elements() ? Representation::External()
-                                 : Representation::Tagged();
+      return is_fixed_typed_array() ? Representation::External()
+                                    : Representation::Tagged();
     }
     if (index == 1) {
       return ArrayInstructionInterface::KeyedAccessIndexRequirement(
@@ -6707,7 +6696,7 @@ class HLoadKeyed final : public HTemplateInstruction<3>,
     SetOperandAt(1, key);
     SetOperandAt(2, dependency != NULL ? dependency : obj);
 
-    if (!is_typed_elements()) {
+    if (!is_fixed_typed_array()) {
       // I can detect the case between storing double (holey and fast) and
       // smi/object by looking at elements_kind_.
       DCHECK(IsFastSmiOrObjectElementsKind(elements_kind) ||
@@ -6733,18 +6722,15 @@ class HLoadKeyed final : public HTemplateInstruction<3>,
         SetDependsOnFlag(kDoubleArrayElements);
       }
     } else {
-      if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-          elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-          elements_kind == FLOAT32_ELEMENTS ||
+      if (elements_kind == FLOAT32_ELEMENTS ||
           elements_kind == FLOAT64_ELEMENTS) {
         set_representation(Representation::Double());
       } else {
         set_representation(Representation::Integer32());
       }
 
-      if (is_external()) {
+      if (is_fixed_typed_array()) {
         SetDependsOnFlag(kExternalMemory);
-      } else if (is_fixed_typed_array()) {
         SetDependsOnFlag(kTypedArrayElements);
       } else {
         UNREACHABLE();
@@ -7113,8 +7099,8 @@ class HStoreKeyed final : public HTemplateInstruction<3>,
     // kind_fixed_typed_array:  tagged[int32] = (double | int32)
     // kind_external:           external[int32] = (double | int32)
     if (index == 0) {
-      return is_typed_elements() ? Representation::External()
-                                 : Representation::Tagged();
+      return is_fixed_typed_array() ? Representation::External()
+                                    : Representation::Tagged();
     } else if (index == 1) {
       return ArrayInstructionInterface::KeyedAccessIndexRequirement(
           OperandAt(1)->representation());
@@ -7139,24 +7125,16 @@ class HStoreKeyed final : public HTemplateInstruction<3>,
       return Representation::Smi();
     }
 
-    return IsExternalArrayElementsKind(kind) ||
-                   IsFixedTypedArrayElementsKind(kind)
-               ? Representation::Integer32()
-               : Representation::Tagged();
-  }
-
-  bool is_external() const {
-    return IsExternalArrayElementsKind(elements_kind());
+    if (IsFixedTypedArrayElementsKind(kind)) {
+      return Representation::Integer32();
+    }
+    return Representation::Tagged();
   }
 
   bool is_fixed_typed_array() const {
     return IsFixedTypedArrayElementsKind(elements_kind());
   }
 
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
-
   Representation observed_input_representation(int index) override {
     if (index < 2) return RequiredInputRepresentation(index);
     if (IsUninitialized()) {
@@ -7246,25 +7224,20 @@ class HStoreKeyed final : public HTemplateInstruction<3>,
       SetFlag(kTrackSideEffectDominators);
       SetDependsOnFlag(kNewSpacePromotion);
     }
-    if (is_external()) {
-      SetChangesFlag(kExternalMemory);
-      SetFlag(kAllowUndefinedAsNaN);
-    } else if (IsFastDoubleElementsKind(elements_kind)) {
+    if (IsFastDoubleElementsKind(elements_kind)) {
       SetChangesFlag(kDoubleArrayElements);
     } else if (IsFastSmiElementsKind(elements_kind)) {
       SetChangesFlag(kArrayElements);
     } else if (is_fixed_typed_array()) {
       SetChangesFlag(kTypedArrayElements);
+      SetChangesFlag(kExternalMemory);
       SetFlag(kAllowUndefinedAsNaN);
     } else {
       SetChangesFlag(kArrayElements);
     }
 
-    // EXTERNAL_{UNSIGNED_,}{BYTE,SHORT,INT}_ELEMENTS are truncating.
-    if ((elements_kind >= EXTERNAL_INT8_ELEMENTS &&
-        elements_kind <= EXTERNAL_UINT32_ELEMENTS) ||
-        (elements_kind >= UINT8_ELEMENTS &&
-        elements_kind <= INT32_ELEMENTS)) {
+    // {UNSIGNED_,}{BYTE,SHORT,INT}_ELEMENTS are truncating.
+    if (elements_kind >= UINT8_ELEMENTS && elements_kind <= INT32_ELEMENTS) {
       SetFlag(kTruncatingToInt32);
     }
   }
diff --git a/src/hydrogen-uint32-analysis.cc b/src/hydrogen-uint32-analysis.cc
index 37f19eb..c6cbc9b 100644
--- a/src/hydrogen-uint32-analysis.cc
+++ b/src/hydrogen-uint32-analysis.cc
@@ -10,10 +10,6 @@ namespace internal {
 
 static bool IsUnsignedLoad(HLoadKeyed* instr) {
   switch (instr->elements_kind()) {
-    case EXTERNAL_UINT8_ELEMENTS:
-    case EXTERNAL_UINT16_ELEMENTS:
-    case EXTERNAL_UINT32_ELEMENTS:
-    case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
     case UINT8_ELEMENTS:
     case UINT16_ELEMENTS:
     case UINT32_ELEMENTS:
@@ -50,14 +46,14 @@ bool HUint32AnalysisPhase::IsSafeUint32Use(HValue* val, HValue* use) {
     return true;
   } else if (use->IsStoreKeyed()) {
     HStoreKeyed* store = HStoreKeyed::cast(use);
-    if (store->is_external()) {
+    if (store->is_fixed_typed_array()) {
       // Storing a value into an external integer array is a bit level
       // operation.
       if (store->value() == val) {
         // Clamping or a conversion to double should have beed inserted.
-        DCHECK(store->elements_kind() != EXTERNAL_UINT8_CLAMPED_ELEMENTS);
-        DCHECK(store->elements_kind() != EXTERNAL_FLOAT32_ELEMENTS);
-        DCHECK(store->elements_kind() != EXTERNAL_FLOAT64_ELEMENTS);
+        DCHECK(store->elements_kind() != UINT8_CLAMPED_ELEMENTS);
+        DCHECK(store->elements_kind() != FLOAT32_ELEMENTS);
+        DCHECK(store->elements_kind() != FLOAT64_ELEMENTS);
         return true;
       }
     }
diff --git a/src/hydrogen.cc b/src/hydrogen.cc
index 2689e42..5e02c32 100644
--- a/src/hydrogen.cc
+++ b/src/hydrogen.cc
@@ -2416,9 +2416,7 @@ HInstruction* HGraphBuilder::BuildUncheckedMonomorphicElementAccess(
     KeyedAccessStoreMode store_mode) {
   DCHECK(top_info()->IsStub() || checked_object->IsCompareMap() ||
          checked_object->IsCheckMaps());
-  DCHECK((!IsExternalArrayElementsKind(elements_kind) &&
-              !IsFixedTypedArrayElementsKind(elements_kind)) ||
-         !is_js_array);
+  DCHECK(!IsFixedTypedArrayElementsKind(elements_kind) || !is_js_array);
   // No GVNFlag is necessary for ElementsKind if there is an explicit dependency
   // on a HElementsTransition instruction. The flag can also be removed if the
   // map to check has FAST_HOLEY_ELEMENTS, since there can be no further
@@ -2449,24 +2447,17 @@ HInstruction* HGraphBuilder::BuildUncheckedMonomorphicElementAccess(
   }
   length->set_type(HType::Smi());
   HValue* checked_key = NULL;
-  if (IsExternalArrayElementsKind(elements_kind) ||
-      IsFixedTypedArrayElementsKind(elements_kind)) {
+  if (IsFixedTypedArrayElementsKind(elements_kind)) {
     checked_object = Add<HCheckArrayBufferNotNeutered>(checked_object);
 
-    HValue* backing_store;
-    if (IsExternalArrayElementsKind(elements_kind)) {
-      backing_store = Add<HLoadNamedField>(
-          elements, nullptr, HObjectAccess::ForExternalArrayExternalPointer());
-    } else {
-      HValue* external_pointer = Add<HLoadNamedField>(
-          elements, nullptr,
-          HObjectAccess::ForFixedTypedArrayBaseExternalPointer());
-      HValue* base_pointer = Add<HLoadNamedField>(
-          elements, nullptr,
-          HObjectAccess::ForFixedTypedArrayBaseBasePointer());
-      backing_store = AddUncasted<HAdd>(external_pointer, base_pointer,
-                                        Strength::WEAK, AddOfExternalAndTagged);
-    }
+    HValue* external_pointer = Add<HLoadNamedField>(
+        elements, nullptr,
+        HObjectAccess::ForFixedTypedArrayBaseExternalPointer());
+    HValue* base_pointer = Add<HLoadNamedField>(
+        elements, nullptr, HObjectAccess::ForFixedTypedArrayBaseBasePointer());
+    HValue* backing_store = AddUncasted<HAdd>(
+        external_pointer, base_pointer, Strength::WEAK, AddOfExternalAndTagged);
+
     if (store_mode == STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS) {
       NoObservableSideEffectsScope no_effects(this);
       IfBuilder length_checker(this);
@@ -2698,8 +2689,7 @@ HInstruction* HGraphBuilder::AddElementAccess(
     LoadKeyedHoleMode load_mode) {
   if (access_type == STORE) {
     DCHECK(val != NULL);
-    if (elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
-        elements_kind == UINT8_CLAMPED_ELEMENTS) {
+    if (elements_kind == UINT8_CLAMPED_ELEMENTS) {
       val = Add<HClampToUint8>(val);
     }
     return Add<HStoreKeyed>(elements, checked_key, val, elements_kind,
@@ -2710,8 +2700,7 @@ HInstruction* HGraphBuilder::AddElementAccess(
   DCHECK(val == NULL);
   HLoadKeyed* load = Add<HLoadKeyed>(
       elements, checked_key, dependency, elements_kind, load_mode);
-  if (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-      elements_kind == UINT32_ELEMENTS) {
+  if (elements_kind == UINT32_ELEMENTS) {
     graph()->RecordUint32Instruction(load);
   }
   return load;
@@ -7411,7 +7400,6 @@ HValue* HOptimizedGraphBuilder::HandlePolymorphicElementAccess(
                                                 val));
     } else {
       DCHECK(IsFastElementsKind(elements_kind) ||
-             IsExternalArrayElementsKind(elements_kind) ||
              IsFixedTypedArrayElementsKind(elements_kind));
       LoadKeyedHoleMode load_mode = BuildKeyedHoleMode(map);
       // Happily, mapcompare is a checked object.
@@ -9946,14 +9934,14 @@ HValue* HOptimizedGraphBuilder::BuildAllocateExternalElements(
     bool is_zero_byte_offset,
     HValue* buffer, HValue* byte_offset, HValue* length) {
   Handle<Map> external_array_map(
-      isolate()->heap()->MapForExternalArrayType(array_type));
+      isolate()->heap()->MapForFixedTypedArray(array_type));
 
   // The HForceRepresentation is to prevent possible deopt on int-smi
   // conversion after allocation but before the new object fields are set.
   length = AddUncasted<HForceRepresentation>(length, Representation::Smi());
-  HValue* elements =
-      Add<HAllocate>(Add<HConstant>(ExternalArray::kSize), HType::HeapObject(),
-                     NOT_TENURED, external_array_map->instance_type());
+  HValue* elements = Add<HAllocate>(
+      Add<HConstant>(FixedTypedArrayBase::kHeaderSize), HType::HeapObject(),
+      NOT_TENURED, external_array_map->instance_type());
 
   AddStoreMapConstant(elements, external_array_map);
   Add<HStoreNamedField>(elements,
@@ -9975,8 +9963,11 @@ HValue* HOptimizedGraphBuilder::BuildAllocateExternalElements(
   }
 
   Add<HStoreNamedField>(elements,
-      HObjectAccess::ForExternalArrayExternalPointer(),
-      typed_array_start);
+                        HObjectAccess::ForFixedTypedArrayBaseBasePointer(),
+                        graph()->GetConstant0());
+  Add<HStoreNamedField>(elements,
+                        HObjectAccess::ForFixedTypedArrayBaseExternalPointer(),
+                        typed_array_start);
 
   return elements;
 }
@@ -10123,13 +10114,10 @@ void HOptimizedGraphBuilder::GenerateTypedArrayInitialize(
   ExternalArrayType array_type =
       kExternalInt8Array;  // Bogus initialization.
   size_t element_size = 1;  // Bogus initialization.
-  ElementsKind external_elements_kind =  // Bogus initialization.
-      EXTERNAL_INT8_ELEMENTS;
   ElementsKind fixed_elements_kind =  // Bogus initialization.
       INT8_ELEMENTS;
   Runtime::ArrayIdToTypeAndSize(array_id,
       &array_type,
-      &external_elements_kind,
       &fixed_elements_kind,
       &element_size);
 
@@ -10154,8 +10142,8 @@ void HOptimizedGraphBuilder::GenerateTypedArrayInitialize(
     if (buffer != NULL) {
       elements = BuildAllocateExternalElements(
           array_type, is_zero_byte_offset, buffer, byte_offset, length);
-      Handle<Map> obj_map = TypedArrayMap(
-          isolate(), array_type, external_elements_kind);
+      Handle<Map> obj_map =
+          TypedArrayMap(isolate(), array_type, fixed_elements_kind);
       AddStoreMapConstant(obj, obj_map);
     } else {
       DCHECK(is_zero_byte_offset);
diff --git a/src/ia32/lithium-codegen-ia32.cc b/src/ia32/lithium-codegen-ia32.cc
index 7f1a983..680dabd 100644
--- a/src/ia32/lithium-codegen-ia32.cc
+++ b/src/ia32/lithium-codegen-ia32.cc
@@ -3068,40 +3068,31 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       instr->hydrogen()->key()->representation(),
       elements_kind,
       instr->base_offset()));
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     XMMRegister result(ToDoubleRegister(instr->result()));
     __ movss(result, operand);
     __ cvtss2sd(result, result);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     __ movsd(ToDoubleRegister(instr->result()), operand);
   } else {
     Register result(ToRegister(instr->result()));
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ movsx_b(result, operand);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ movzx_b(result, operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ movsx_w(result, operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ movzx_w(result, operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ mov(result, operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ mov(result, operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3109,8 +3100,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
         }
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -3190,7 +3179,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4203,39 +4192,28 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       instr->hydrogen()->key()->representation(),
       elements_kind,
       instr->base_offset()));
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     XMMRegister xmm_scratch = double_scratch0();
     __ cvtsd2ss(xmm_scratch, ToDoubleRegister(instr->value()));
     __ movss(operand, xmm_scratch);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     __ movsd(operand, ToDoubleRegister(instr->value()));
   } else {
     Register value = ToRegister(instr->value());
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case INT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ mov_b(operand, value);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ mov_w(operand, value);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ mov(operand, value);
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4321,7 +4299,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases...external, fast-double, fast
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/ia32/lithium-ia32.cc b/src/ia32/lithium-ia32.cc
index e07c1e8..1235e56 100644
--- a/src/ia32/lithium-ia32.cc
+++ b/src/ia32/lithium-ia32.cc
@@ -2239,7 +2239,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
       : UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = UseRegisterAtStart(instr->elements());
     result = DefineAsRegister(new(zone()) LLoadKeyed(obj, key));
   } else {
@@ -2253,10 +2253,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2293,9 +2292,6 @@ LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
 
   // Determine if we need a byte register in this case for the value.
   bool val_is_fixed_register =
-      elements_kind == EXTERNAL_INT8_ELEMENTS ||
-      elements_kind == EXTERNAL_UINT8_ELEMENTS ||
-      elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
       elements_kind == UINT8_ELEMENTS ||
       elements_kind == INT8_ELEMENTS ||
       elements_kind == UINT8_CLAMPED_ELEMENTS;
@@ -2308,7 +2304,7 @@ LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     DCHECK(instr->key()->representation().IsInteger32() ||
            instr->key()->representation().IsSmi());
diff --git a/src/ia32/lithium-ia32.h b/src/ia32/lithium-ia32.h
index 9bcc5f4..9224dcb 100644
--- a/src/ia32/lithium-ia32.h
+++ b/src/ia32/lithium-ia32.h
@@ -1641,15 +1641,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -1669,12 +1663,8 @@ inline static bool ExternalArrayOpRequiresTemp(
   // an index cannot fold the scale operation into a load and need an extra
   // temp register to do the work.
   return key_representation.IsSmi() &&
-      (elements_kind == EXTERNAL_INT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
-       elements_kind == UINT8_ELEMENTS ||
-       elements_kind == INT8_ELEMENTS ||
-       elements_kind == UINT8_CLAMPED_ELEMENTS);
+         (elements_kind == UINT8_ELEMENTS || elements_kind == INT8_ELEMENTS ||
+          elements_kind == UINT8_CLAMPED_ELEMENTS);
 }
 
 
@@ -2257,13 +2247,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = val;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/ic/handler-compiler.cc b/src/ic/handler-compiler.cc
index 379e79f..c7220af 100644
--- a/src/ic/handler-compiler.cc
+++ b/src/ic/handler-compiler.cc
@@ -577,7 +577,6 @@ void ElementHandlerCompiler::CompileElementHandlers(
       } else if (IsSloppyArgumentsElements(elements_kind)) {
         cached_stub = KeyedLoadSloppyArgumentsStub(isolate()).GetCode();
       } else if (IsFastElementsKind(elements_kind) ||
-                 IsExternalArrayElementsKind(elements_kind) ||
                  IsFixedTypedArrayElementsKind(elements_kind)) {
         cached_stub = LoadFastElementStub(isolate(), is_js_array, elements_kind,
                                           convert_hole_to_undefined).GetCode();
diff --git a/src/ic/ic-compiler.cc b/src/ic/ic-compiler.cc
index a5ae6cf..4fe3023 100644
--- a/src/ic/ic-compiler.cc
+++ b/src/ic/ic-compiler.cc
@@ -109,7 +109,6 @@ Handle<Code> PropertyICCompiler::ComputeKeyedLoadMonomorphicHandler(
   } else if (receiver_map->has_sloppy_arguments_elements()) {
     stub = KeyedLoadSloppyArgumentsStub(isolate).GetCode();
   } else if (receiver_map->has_fast_elements() ||
-             receiver_map->has_external_array_elements() ||
              receiver_map->has_fixed_typed_array_elements()) {
     stub = LoadFastElementStub(isolate, is_js_array, elements_kind,
                                convert_hole_to_undefined).GetCode();
@@ -369,7 +368,6 @@ Handle<Code> PropertyICCompiler::CompileKeyedStorePolymorphic(
       if (IsSloppyArgumentsElements(elements_kind)) {
         cached_stub = KeyedStoreSloppyArgumentsStub(isolate()).GetCode();
       } else if (receiver_map->has_fast_elements() ||
-                 receiver_map->has_external_array_elements() ||
                  receiver_map->has_fixed_typed_array_elements()) {
         cached_stub = StoreFastElementStub(isolate(), is_js_array,
                                            elements_kind, store_mode).GetCode();
@@ -401,7 +399,6 @@ Handle<Code> PropertyICCompiler::CompileKeyedStoreMonomorphic(
   if (receiver_map->has_sloppy_arguments_elements()) {
     stub = KeyedStoreSloppyArgumentsStub(isolate()).GetCode();
   } else if (receiver_map->has_fast_elements() ||
-             receiver_map->has_external_array_elements() ||
              receiver_map->has_fixed_typed_array_elements()) {
     stub = StoreFastElementStub(isolate(), is_jsarray, elements_kind,
                                 store_mode).GetCode();
diff --git a/src/ic/ic.cc b/src/ic/ic.cc
index 99307f7..19f4699 100644
--- a/src/ic/ic.cc
+++ b/src/ic/ic.cc
@@ -1953,8 +1953,7 @@ Handle<Code> KeyedStoreIC::StoreElementStub(Handle<JSObject> receiver,
   if (store_mode != STANDARD_STORE) {
     int external_arrays = 0;
     for (int i = 0; i < target_receiver_maps.length(); ++i) {
-      if (target_receiver_maps[i]->has_external_array_elements() ||
-          target_receiver_maps[i]->has_fixed_typed_array_elements()) {
+      if (target_receiver_maps[i]->has_fixed_typed_array_elements()) {
         external_arrays++;
       }
     }
@@ -1991,7 +1990,7 @@ Handle<Map> KeyedStoreIC::ComputeTransitionedMap(
     case STORE_AND_GROW_TRANSITION_HOLEY_SMI_TO_DOUBLE:
       return Map::TransitionElementsTo(map, FAST_HOLEY_DOUBLE_ELEMENTS);
     case STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS:
-      DCHECK(map->has_external_array_elements());
+      DCHECK(map->has_fixed_typed_array_elements());
     // Fall through
     case STORE_NO_TRANSITION_HANDLE_COW:
     case STANDARD_STORE:
@@ -2074,7 +2073,7 @@ static KeyedAccessStoreMode GetStoreMode(Handle<JSObject> receiver,
       }
     }
     if (!FLAG_trace_external_array_abuse &&
-        receiver->map()->has_external_array_elements() && oob_access) {
+        receiver->map()->has_fixed_typed_array_elements() && oob_access) {
       return STORE_NO_TRANSITION_IGNORE_OUT_OF_BOUNDS;
     }
     Heap* heap = receiver->GetHeap();
diff --git a/src/lookup.cc b/src/lookup.cc
index 7d9f791..75d4603 100644
--- a/src/lookup.cc
+++ b/src/lookup.cc
@@ -117,8 +117,7 @@ void LookupIterator::ReloadPropertyInformation() {
 void LookupIterator::ReloadHolderMap() {
   DCHECK_EQ(DATA, state_);
   DCHECK(IsElement());
-  DCHECK(JSObject::cast(*holder_)->HasExternalArrayElements() ||
-         JSObject::cast(*holder_)->HasFixedTypedArrayElements());
+  DCHECK(JSObject::cast(*holder_)->HasFixedTypedArrayElements());
   if (*holder_map_ != holder_->map()) {
     holder_map_ = handle(holder_->map(), isolate_);
   }
@@ -161,7 +160,6 @@ void LookupIterator::ReconfigureDataProperty(Handle<Object> value,
   DCHECK(HolderIsReceiverOrHiddenPrototype());
   Handle<JSObject> holder = GetHolder<JSObject>();
   if (IsElement()) {
-    DCHECK(!holder->HasExternalArrayElements());
     DCHECK(!holder->HasFixedTypedArrayElements());
     DCHECK(attributes != NONE || !holder->HasFastElements());
     Handle<FixedArrayBase> elements(holder->elements());
diff --git a/src/mips/lithium-codegen-mips.cc b/src/mips/lithium-codegen-mips.cc
index 838cd1c..7985dfa 100644
--- a/src/mips/lithium-codegen-mips.cc
+++ b/src/mips/lithium-codegen-mips.cc
@@ -3111,10 +3111,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     FPURegister result = ToDoubleRegister(instr->result());
     if (key_is_constant) {
       __ Addu(scratch0(), external_pointer, constant_key << element_size_shift);
@@ -3122,8 +3119,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       __ sll(scratch0(), key, shift_size);
       __ Addu(scratch0(), scratch0(), external_pointer);
     }
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ lwc1(result, MemOperand(scratch0(), base_offset));
       __ cvt_d_s(result, result);
     } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
@@ -3135,29 +3131,22 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         key, external_pointer, key_is_constant, constant_key,
         element_size_shift, shift_size, base_offset);
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ lb(result, mem_operand);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ lbu(result, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ lh(result, mem_operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ lhu(result, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ lw(result, mem_operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ lw(result, mem_operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3167,8 +3156,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -3280,7 +3267,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4272,10 +4259,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       ? (element_size_shift - kSmiTagSize) : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     Register address = scratch0();
     FPURegister value(ToDoubleRegister(instr->value()));
     if (key_is_constant) {
@@ -4290,8 +4274,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       __ Addu(address, external_pointer, address);
     }
 
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ cvt_s_d(double_scratch0(), value);
       __ swc1(double_scratch0(), MemOperand(address, base_offset));
     } else {  // Storing doubles, not floats.
@@ -4304,30 +4287,21 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
         element_size_shift, shift_size,
         base_offset);
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
       case INT8_ELEMENTS:
         __ sb(value, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ sh(value, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ sw(value, mem_operand);
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4441,7 +4415,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases: external, fast double
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/mips/lithium-mips.cc b/src/mips/lithium-mips.cc
index 9c15d39..82a5ef5 100644
--- a/src/mips/lithium-mips.cc
+++ b/src/mips/lithium-mips.cc
@@ -2184,7 +2184,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2204,10 +2204,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2242,7 +2241,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
diff --git a/src/mips/lithium-mips.h b/src/mips/lithium-mips.h
index 406f877..2998219 100644
--- a/src/mips/lithium-mips.h
+++ b/src/mips/lithium-mips.h
@@ -1610,15 +1610,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -2216,13 +2210,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/mips64/lithium-codegen-mips64.cc b/src/mips64/lithium-codegen-mips64.cc
index f87c852..999db36 100644
--- a/src/mips64/lithium-codegen-mips64.cc
+++ b/src/mips64/lithium-codegen-mips64.cc
@@ -3231,10 +3231,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     FPURegister result = ToDoubleRegister(instr->result());
     if (key_is_constant) {
       __ Daddu(scratch0(), external_pointer,
@@ -3251,8 +3248,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       }
       __ Daddu(scratch0(), scratch0(), external_pointer);
     }
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ lwc1(result, MemOperand(scratch0(), base_offset));
       __ cvt_d_s(result, result);
     } else  {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
@@ -3264,29 +3260,22 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         key, external_pointer, key_is_constant, constant_key,
         element_size_shift, shift_size, base_offset);
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ lb(result, mem_operand);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ lbu(result, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ lh(result, mem_operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ lhu(result, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ lw(result, mem_operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ lw(result, mem_operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3296,8 +3285,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -3435,7 +3422,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4466,10 +4453,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       : element_size_shift;
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     Register address = scratch0();
     FPURegister value(ToDoubleRegister(instr->value()));
     if (key_is_constant) {
@@ -4492,8 +4476,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       __ Daddu(address, external_pointer, address);
     }
 
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ cvt_s_d(double_scratch0(), value);
       __ swc1(double_scratch0(), MemOperand(address, base_offset));
     } else {  // Storing doubles, not floats.
@@ -4506,30 +4489,21 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
         element_size_shift, shift_size,
         base_offset);
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
       case INT8_ELEMENTS:
         __ sb(value, mem_operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ sh(value, mem_operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ sw(value, mem_operand);
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4656,7 +4630,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases: external, fast double
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/mips64/lithium-mips64.cc b/src/mips64/lithium-mips64.cc
index f6a0f8d..1a7cf71 100644
--- a/src/mips64/lithium-mips64.cc
+++ b/src/mips64/lithium-mips64.cc
@@ -2187,7 +2187,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2208,10 +2208,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2246,7 +2245,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
diff --git a/src/mips64/lithium-mips64.h b/src/mips64/lithium-mips64.h
index ce40377..71ce549 100644
--- a/src/mips64/lithium-mips64.h
+++ b/src/mips64/lithium-mips64.h
@@ -1672,15 +1672,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -2262,13 +2256,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/objects-debug.cc b/src/objects-debug.cc
index b68895f..5babfdf 100644
--- a/src/objects-debug.cc
+++ b/src/objects-debug.cc
@@ -78,9 +78,6 @@ void HeapObject::HeapObjectVerify() {
       break;
 
 #define VERIFY_TYPED_ARRAY(Type, type, TYPE, ctype, size)                      \
-    case EXTERNAL_##TYPE##_ARRAY_TYPE:                                         \
-      External##Type##Array::cast(this)->External##Type##ArrayVerify();        \
-      break;                                                                   \
     case FIXED_##TYPE##_ARRAY_TYPE:                                            \
       Fixed##Type##Array::cast(this)->FixedTypedArrayVerify();                 \
       break;
@@ -236,21 +233,17 @@ void FreeSpace::FreeSpaceVerify() {
 }
 
 
-#define EXTERNAL_ARRAY_VERIFY(Type, type, TYPE, ctype, size)                  \
-  void External##Type##Array::External##Type##ArrayVerify() {                 \
-    CHECK(IsExternal##Type##Array());                                         \
-  }
-
-TYPED_ARRAYS(EXTERNAL_ARRAY_VERIFY)
-#undef EXTERNAL_ARRAY_VERIFY
-
-
 template <class Traits>
 void FixedTypedArray<Traits>::FixedTypedArrayVerify() {
   CHECK(IsHeapObject() &&
         HeapObject::cast(this)->map()->instance_type() ==
             Traits::kInstanceType);
-  CHECK(base_pointer() == this);
+  if (base_pointer() == this) {
+    CHECK(external_pointer() ==
+          ExternalReference::fixed_typed_array_base_data_offset().address());
+  } else {
+    CHECK(base_pointer() == nullptr);
+  }
 }
 
 
@@ -1096,7 +1089,6 @@ void JSObject::IncrementSpillStatistics(SpillInformation* info) {
     }
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
-    case EXTERNAL_##TYPE##_ELEMENTS:                                          \
     case TYPE##_ELEMENTS:
 
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
diff --git a/src/objects-inl.h b/src/objects-inl.h
index 8e28aac..4929c0d 100644
--- a/src/objects-inl.h
+++ b/src/objects-inl.h
@@ -141,8 +141,7 @@ int PropertyDetails::field_width_in_words() const {
 
 
 bool Object::IsFixedArrayBase() const {
-  return IsFixedArray() || IsFixedDoubleArray() || IsFixedTypedArrayBase() ||
-         IsExternalArray();
+  return IsFixedArray() || IsFixedDoubleArray() || IsFixedTypedArrayBase();
 }
 
 
@@ -270,8 +269,7 @@ bool Object::IsExternalTwoByteString() const {
 
 bool Object::HasValidElements() {
   // Dictionary is covered under FixedArray.
-  return IsFixedArray() || IsFixedDoubleArray() || IsExternalArray() ||
-         IsFixedTypedArrayBase();
+  return IsFixedArray() || IsFixedDoubleArray() || IsFixedTypedArrayBase();
 }
 
 
@@ -659,18 +657,8 @@ bool Object::IsFiller() const {
 }
 
 
-bool Object::IsExternalArray() const {
-  if (!Object::IsHeapObject())
-    return false;
-  InstanceType instance_type =
-      HeapObject::cast(this)->map()->instance_type();
-  return (instance_type >= FIRST_EXTERNAL_ARRAY_TYPE &&
-          instance_type <= LAST_EXTERNAL_ARRAY_TYPE);
-}
-
 
 #define TYPED_ARRAY_TYPE_CHECKER(Type, type, TYPE, ctype, size)               \
-  TYPE_CHECKER(External##Type##Array, EXTERNAL_##TYPE##_ARRAY_TYPE)           \
   TYPE_CHECKER(Fixed##Type##Array, FIXED_##TYPE##_ARRAY_TYPE)
 
 TYPED_ARRAYS(TYPED_ARRAY_TYPE_CHECKER)
@@ -2643,10 +2631,6 @@ FixedArrayBase* Map::GetInitialElements() {
       has_fast_double_elements()) {
     DCHECK(!GetHeap()->InNewSpace(GetHeap()->empty_fixed_array()));
     return GetHeap()->empty_fixed_array();
-  } else if (has_external_array_elements()) {
-    ExternalArray* empty_array = GetHeap()->EmptyExternalArrayForMap(this);
-    DCHECK(!GetHeap()->InNewSpace(empty_array));
-    return empty_array;
   } else if (has_fixed_typed_array_elements()) {
     FixedTypedArrayBase* empty_array =
         GetHeap()->EmptyFixedTypedArrayForMap(this);
@@ -2935,19 +2919,9 @@ CAST_ACCESSOR(DeoptimizationInputData)
 CAST_ACCESSOR(DeoptimizationOutputData)
 CAST_ACCESSOR(DependentCode)
 CAST_ACCESSOR(DescriptorArray)
-CAST_ACCESSOR(ExternalArray)
 CAST_ACCESSOR(ExternalOneByteString)
-CAST_ACCESSOR(ExternalFloat32Array)
-CAST_ACCESSOR(ExternalFloat64Array)
-CAST_ACCESSOR(ExternalInt16Array)
-CAST_ACCESSOR(ExternalInt32Array)
-CAST_ACCESSOR(ExternalInt8Array)
 CAST_ACCESSOR(ExternalString)
 CAST_ACCESSOR(ExternalTwoByteString)
-CAST_ACCESSOR(ExternalUint16Array)
-CAST_ACCESSOR(ExternalUint32Array)
-CAST_ACCESSOR(ExternalUint8Array)
-CAST_ACCESSOR(ExternalUint8ClampedArray)
 CAST_ACCESSOR(FixedArray)
 CAST_ACCESSOR(FixedArrayBase)
 CAST_ACCESSOR(FixedDoubleArray)
@@ -3657,211 +3631,6 @@ Address BytecodeArray::GetFirstBytecodeAddress() {
 }
 
 
-uint8_t* ExternalUint8ClampedArray::external_uint8_clamped_pointer() {
-  return reinterpret_cast<uint8_t*>(external_pointer());
-}
-
-
-uint8_t ExternalUint8ClampedArray::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint8_t* ptr = external_uint8_clamped_pointer();
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalUint8ClampedArray::get(
-    Handle<ExternalUint8ClampedArray> array,
-    int index) {
-  return Handle<Smi>(Smi::FromInt(array->get_scalar(index)),
-                     array->GetIsolate());
-}
-
-
-void ExternalUint8ClampedArray::set(int index, uint8_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint8_t* ptr = external_uint8_clamped_pointer();
-  ptr[index] = value;
-}
-
-
-void* ExternalArray::external_pointer() const {
-  intptr_t ptr = READ_INTPTR_FIELD(this, kExternalPointerOffset);
-  return reinterpret_cast<void*>(ptr);
-}
-
-
-void ExternalArray::set_external_pointer(void* value, WriteBarrierMode mode) {
-  intptr_t ptr = reinterpret_cast<intptr_t>(value);
-  WRITE_INTPTR_FIELD(this, kExternalPointerOffset, ptr);
-}
-
-
-int8_t ExternalInt8Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int8_t* ptr = static_cast<int8_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalInt8Array::get(Handle<ExternalInt8Array> array,
-                                      int index) {
-  return Handle<Smi>(Smi::FromInt(array->get_scalar(index)),
-                     array->GetIsolate());
-}
-
-
-void ExternalInt8Array::set(int index, int8_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int8_t* ptr = static_cast<int8_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-uint8_t ExternalUint8Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint8_t* ptr = static_cast<uint8_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalUint8Array::get(Handle<ExternalUint8Array> array,
-                                       int index) {
-  return Handle<Smi>(Smi::FromInt(array->get_scalar(index)),
-                     array->GetIsolate());
-}
-
-
-void ExternalUint8Array::set(int index, uint8_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint8_t* ptr = static_cast<uint8_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-int16_t ExternalInt16Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int16_t* ptr = static_cast<int16_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalInt16Array::get(Handle<ExternalInt16Array> array,
-                                       int index) {
-  return Handle<Smi>(Smi::FromInt(array->get_scalar(index)),
-                     array->GetIsolate());
-}
-
-
-void ExternalInt16Array::set(int index, int16_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int16_t* ptr = static_cast<int16_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-uint16_t ExternalUint16Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint16_t* ptr = static_cast<uint16_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalUint16Array::get(Handle<ExternalUint16Array> array,
-                                        int index) {
-  return Handle<Smi>(Smi::FromInt(array->get_scalar(index)),
-                     array->GetIsolate());
-}
-
-
-void ExternalUint16Array::set(int index, uint16_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint16_t* ptr = static_cast<uint16_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-int32_t ExternalInt32Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int32_t* ptr = static_cast<int32_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalInt32Array::get(Handle<ExternalInt32Array> array,
-                                       int index) {
-  return array->GetIsolate()->factory()->
-      NewNumberFromInt(array->get_scalar(index));
-}
-
-
-void ExternalInt32Array::set(int index, int32_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  int32_t* ptr = static_cast<int32_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-uint32_t ExternalUint32Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint32_t* ptr = static_cast<uint32_t*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalUint32Array::get(Handle<ExternalUint32Array> array,
-                                        int index) {
-  return array->GetIsolate()->factory()->
-      NewNumberFromUint(array->get_scalar(index));
-}
-
-
-void ExternalUint32Array::set(int index, uint32_t value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  uint32_t* ptr = static_cast<uint32_t*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-float ExternalFloat32Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  float* ptr = static_cast<float*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalFloat32Array::get(Handle<ExternalFloat32Array> array,
-                                         int index) {
-  return array->GetIsolate()->factory()->NewNumber(array->get_scalar(index));
-}
-
-
-void ExternalFloat32Array::set(int index, float value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  float* ptr = static_cast<float*>(external_pointer());
-  ptr[index] = value;
-}
-
-
-double ExternalFloat64Array::get_scalar(int index) {
-  DCHECK((index >= 0) && (index < this->length()));
-  double* ptr = static_cast<double*>(external_pointer());
-  return ptr[index];
-}
-
-
-Handle<Object> ExternalFloat64Array::get(Handle<ExternalFloat64Array> array,
-                                         int index) {
-  return array->GetIsolate()->factory()->NewNumber(array->get_scalar(index));
-}
-
-
-void ExternalFloat64Array::set(int index, double value) {
-  DCHECK((index >= 0) && (index < this->length()));
-  double* ptr = static_cast<double*>(external_pointer());
-  ptr[index] = value;
-}
-
-
 ACCESSORS(FixedTypedArrayBase, base_pointer, Object, kBasePointerOffset)
 
 
@@ -3904,6 +3673,7 @@ int FixedTypedArrayBase::ElementSize(InstanceType type) {
 
 
 int FixedTypedArrayBase::DataSize(InstanceType type) {
+  if (base_pointer() == Smi::FromInt(0)) return 0;
   return length() * ElementSize(type);
 }
 
@@ -6311,27 +6081,6 @@ bool JSObject::HasSloppyArgumentsElements() {
 }
 
 
-bool JSObject::HasExternalArrayElements() {
-  HeapObject* array = elements();
-  DCHECK(array != NULL);
-  return array->IsExternalArray();
-}
-
-
-#define EXTERNAL_ELEMENTS_CHECK(Type, type, TYPE, ctype, size)          \
-bool JSObject::HasExternal##Type##Elements() {                          \
-  HeapObject* array = elements();                                       \
-  DCHECK(array != NULL);                                                \
-  if (!array->IsHeapObject())                                           \
-    return false;                                                       \
-  return array->map()->instance_type() == EXTERNAL_##TYPE##_ARRAY_TYPE; \
-}
-
-TYPED_ARRAYS(EXTERNAL_ELEMENTS_CHECK)
-
-#undef EXTERNAL_ELEMENTS_CHECK
-
-
 bool JSObject::HasFixedTypedArrayElements() {
   HeapObject* array = elements();
   DCHECK(array != NULL);
@@ -7003,7 +6752,7 @@ bool JSArray::SetLengthWouldNormalize(Heap* heap, uint32_t new_length) {
 
 bool JSArray::AllowsSetLength() {
   bool result = elements()->IsFixedArray() || elements()->IsFixedDoubleArray();
-  DCHECK(result == !HasExternalArrayElements());
+  DCHECK(result == !HasFixedTypedArrayElements());
   return result;
 }
 
diff --git a/src/objects-printer.cc b/src/objects-printer.cc
index f45a035..cb67d6a 100644
--- a/src/objects-printer.cc
+++ b/src/objects-printer.cc
@@ -80,14 +80,6 @@ void HeapObject::HeapObjectPrint(std::ostream& os) {  // NOLINT
       FreeSpace::cast(this)->FreeSpacePrint(os);
       break;
 
-#define PRINT_EXTERNAL_ARRAY(Type, type, TYPE, ctype, size)            \
-  case EXTERNAL_##TYPE##_ARRAY_TYPE:                                   \
-    External##Type##Array::cast(this)->External##Type##ArrayPrint(os); \
-    break;
-
-     TYPED_ARRAYS(PRINT_EXTERNAL_ARRAY)
-#undef PRINT_EXTERNAL_ARRAY
-
 #define PRINT_FIXED_TYPED_ARRAY(Type, type, TYPE, ctype, size) \
   case Fixed##Type##Array::kInstanceType:                      \
     Fixed##Type##Array::cast(this)->FixedTypedArrayPrint(os);  \
@@ -215,16 +207,6 @@ void FreeSpace::FreeSpacePrint(std::ostream& os) {  // NOLINT
 }
 
 
-#define EXTERNAL_ARRAY_PRINTER(Type, type, TYPE, ctype, size)                \
-  void External##Type##Array::External##Type##ArrayPrint(std::ostream& os) { \
-    os << "external " #type " array";                                        \
-  }
-
-TYPED_ARRAYS(EXTERNAL_ARRAY_PRINTER)
-
-#undef EXTERNAL_ARRAY_PRINTER
-
-
 template <class Traits>
 void FixedTypedArray<Traits>::FixedTypedArrayPrint(
     std::ostream& os) {  // NOLINT
@@ -321,19 +303,6 @@ void JSObject::PrintElements(std::ostream& os) {  // NOLINT
     break;                                 \
   }
 
-    PRINT_ELEMENTS(EXTERNAL_UINT8_CLAMPED_ELEMENTS, ExternalUint8ClampedArray)
-    PRINT_ELEMENTS(EXTERNAL_INT8_ELEMENTS, ExternalInt8Array)
-    PRINT_ELEMENTS(EXTERNAL_UINT8_ELEMENTS,
-        ExternalUint8Array)
-    PRINT_ELEMENTS(EXTERNAL_INT16_ELEMENTS, ExternalInt16Array)
-    PRINT_ELEMENTS(EXTERNAL_UINT16_ELEMENTS,
-        ExternalUint16Array)
-    PRINT_ELEMENTS(EXTERNAL_INT32_ELEMENTS, ExternalInt32Array)
-    PRINT_ELEMENTS(EXTERNAL_UINT32_ELEMENTS,
-        ExternalUint32Array)
-    PRINT_ELEMENTS(EXTERNAL_FLOAT32_ELEMENTS, ExternalFloat32Array)
-    PRINT_ELEMENTS(EXTERNAL_FLOAT64_ELEMENTS, ExternalFloat64Array)
-
     PRINT_ELEMENTS(UINT8_ELEMENTS, FixedUint8Array)
     PRINT_ELEMENTS(UINT8_CLAMPED_ELEMENTS, FixedUint8ClampedArray)
     PRINT_ELEMENTS(INT8_ELEMENTS, FixedInt8Array)
diff --git a/src/objects.cc b/src/objects.cc
index 2e1443a..06d05f4 100644
--- a/src/objects.cc
+++ b/src/objects.cc
@@ -1281,10 +1281,6 @@ void HeapObject::HeapObjectShortPrint(std::ostream& os) {  // NOLINT
       os << "<FreeSpace[" << FreeSpace::cast(this)->Size() << "]>";
       break;
 #define TYPED_ARRAY_SHORT_PRINT(Type, type, TYPE, ctype, size)                \
-  case EXTERNAL_##TYPE##_ARRAY_TYPE:                                          \
-    os << "<External" #Type "Array["                                          \
-       << External##Type##Array::cast(this)->length() << "]>";                \
-    break;                                                                    \
   case FIXED_##TYPE##_ARRAY_TYPE:                                             \
     os << "<Fixed" #Type "Array[" << Fixed##Type##Array::cast(this)->length() \
        << "]>";                                                               \
@@ -1508,9 +1504,6 @@ void HeapObject::IterateBody(InstanceType type, int object_size,
       break;
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-  case EXTERNAL_##TYPE##_ARRAY_TYPE:                    \
-    break;                                              \
-                                                        \
   case FIXED_##TYPE##_ARRAY_TYPE:                       \
     reinterpret_cast<FixedTypedArrayBase*>(this)        \
         ->FixedTypedArrayBaseIterateBody(v);            \
@@ -3318,8 +3311,7 @@ MaybeHandle<Object> Object::SetDataProperty(LookupIterator* it,
 
   Handle<Object> to_assign = value;
   // Convert the incoming value to a number for storing into typed arrays.
-  if (it->IsElement() && (receiver->HasExternalArrayElements() ||
-                          receiver->HasFixedTypedArrayElements())) {
+  if (it->IsElement() && receiver->HasFixedTypedArrayElements()) {
     if (!value->IsNumber() && !value->IsUndefined()) {
       ASSIGN_RETURN_ON_EXCEPTION(it->isolate(), to_assign,
                                  Execution::ToNumber(it->isolate(), value),
@@ -3431,13 +3423,11 @@ MaybeHandle<Object> Object::AddDataProperty(LookupIterator* it,
       }
 
       if (FLAG_trace_external_array_abuse &&
-          (array->HasExternalArrayElements() ||
-           array->HasFixedTypedArrayElements())) {
+          array->HasFixedTypedArrayElements()) {
         CheckArrayAbuse(array, "typed elements write", it->index(), true);
       }
 
-      if (FLAG_trace_js_array_abuse && !array->HasExternalArrayElements() &&
-          !array->HasFixedTypedArrayElements()) {
+      if (FLAG_trace_js_array_abuse && !array->HasFixedTypedArrayElements()) {
         CheckArrayAbuse(array, "elements write", it->index(), false);
       }
     }
@@ -4266,8 +4256,7 @@ MaybeHandle<Object> JSObject::DefineOwnPropertyIgnoreAttributes(
 
         // Special case: properties of typed arrays cannot be reconfigured to
         // non-writable nor to non-enumerable.
-        if (it->IsElement() && (object->HasExternalArrayElements() ||
-                                object->HasFixedTypedArrayElements())) {
+        if (it->IsElement() && object->HasFixedTypedArrayElements()) {
           return RedefineNonconfigurableProperty(it->isolate(), it->GetName(),
                                                  value, STRICT);
         }
@@ -4850,8 +4839,7 @@ Handle<SeededNumberDictionary> JSObject::GetNormalizedElementDictionary(
 
 Handle<SeededNumberDictionary> JSObject::NormalizeElements(
     Handle<JSObject> object) {
-  DCHECK(!object->HasExternalArrayElements() &&
-         !object->HasFixedTypedArrayElements());
+  DCHECK(!object->HasFixedTypedArrayElements());
   Isolate* isolate = object->GetIsolate();
 
   // Find the backing store.
@@ -5356,7 +5344,6 @@ bool JSObject::ReferencesObject(Object* obj) {
     // Raw pixels and external arrays do not reference other
     // objects.
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                        \
-    case EXTERNAL_##TYPE##_ELEMENTS:                                           \
     case TYPE##_ELEMENTS:                                                      \
       break;
 
@@ -5466,8 +5453,7 @@ MaybeHandle<Object> JSObject::PreventExtensions(Handle<JSObject> object) {
   }
 
   // It's not possible to seal objects with external array elements
-  if (object->HasExternalArrayElements() ||
-      object->HasFixedTypedArrayElements()) {
+  if (object->HasFixedTypedArrayElements()) {
     THROW_NEW_ERROR(
         isolate, NewTypeError(MessageTemplate::kCannotPreventExtExternalArray),
         Object);
@@ -5560,8 +5546,7 @@ MaybeHandle<Object> JSObject::PreventExtensionsWithTransition(
   }
 
   // It's not possible to seal or freeze objects with external array elements
-  if (object->HasExternalArrayElements() ||
-      object->HasFixedTypedArrayElements()) {
+  if (object->HasFixedTypedArrayElements()) {
     THROW_NEW_ERROR(
         isolate, NewTypeError(MessageTemplate::kCannotPreventExtExternalArray),
         Object);
@@ -5830,7 +5815,7 @@ MaybeHandle<JSObject> JSObjectWalkVisitor<ContextObject>::StructureWalk(
 
     // Deep copy own elements.
     // Pixel elements cannot be created using an object literal.
-    DCHECK(!copy->HasExternalArrayElements());
+    DCHECK(!copy->HasFixedTypedArrayElements());
     switch (kind) {
       case FAST_SMI_ELEMENTS:
       case FAST_ELEMENTS:
@@ -5892,7 +5877,6 @@ MaybeHandle<JSObject> JSObjectWalkVisitor<ContextObject>::StructureWalk(
 
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                        \
-      case EXTERNAL_##TYPE##_ELEMENTS:                                         \
       case TYPE##_ELEMENTS:                                                    \
 
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -6295,8 +6279,7 @@ MaybeHandle<Object> JSObject::DefineAccessor(Handle<JSObject> object,
   }
 
   // Ignore accessors on typed arrays.
-  if (it.IsElement() && (object->HasFixedTypedArrayElements() ||
-                         object->HasExternalArrayElements())) {
+  if (it.IsElement() && object->HasFixedTypedArrayElements()) {
     return it.factory()->undefined_value();
   }
 
@@ -6359,8 +6342,7 @@ MaybeHandle<Object> JSObject::SetAccessor(Handle<JSObject> object,
   }
 
   // Ignore accessors on typed arrays.
-  if (it.IsElement() && (object->HasFixedTypedArrayElements() ||
-                         object->HasExternalArrayElements())) {
+  if (it.IsElement() && object->HasFixedTypedArrayElements()) {
     return it.factory()->undefined_value();
   }
 
@@ -6777,13 +6759,10 @@ Handle<Map> Map::CopyAsElementsKind(Handle<Map> map, ElementsKind kind,
   Map* maybe_elements_transition_map = NULL;
   if (flag == INSERT_TRANSITION) {
     maybe_elements_transition_map = map->ElementsTransitionMap();
-    DCHECK(
-        maybe_elements_transition_map == NULL ||
-        ((maybe_elements_transition_map->elements_kind() ==
-              DICTIONARY_ELEMENTS ||
-          IsExternalArrayElementsKind(
-              maybe_elements_transition_map->elements_kind())) &&
-         (kind == DICTIONARY_ELEMENTS || IsExternalArrayElementsKind(kind))));
+    DCHECK(maybe_elements_transition_map == NULL ||
+           (maybe_elements_transition_map->elements_kind() ==
+                DICTIONARY_ELEMENTS &&
+            kind == DICTIONARY_ELEMENTS));
     DCHECK(!IsFastElementsKind(kind) ||
            IsMoreGeneralElementsKindTransition(map->elements_kind(), kind));
     DCHECK(kind != map->elements_kind());
@@ -12599,7 +12578,6 @@ int JSObject::GetFastElementsUsage() {
     case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
     case DICTIONARY_ELEMENTS:
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                      \
-    case EXTERNAL_##TYPE##_ELEMENTS:                                         \
     case TYPE##_ELEMENTS:                                                    \
 
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -13033,7 +13011,6 @@ int JSObject::GetOwnElementKeys(FixedArray* storage,
     }
 
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                      \
-    case EXTERNAL_##TYPE##_ELEMENTS:                                         \
     case TYPE##_ELEMENTS:                                                    \
 
     TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -13855,8 +13832,7 @@ Handle<Object> JSObject::PrepareElementsForSort(Handle<JSObject> object,
     JSObject::ValidateElements(object);
 
     JSObject::SetMapAndElements(object, new_map, fast_elements);
-  } else if (object->HasExternalArrayElements() ||
-             object->HasFixedTypedArrayElements()) {
+  } else if (object->HasFixedTypedArrayElements()) {
     // Typed arrays cannot have holes or undefined elements.
     return handle(Smi::FromInt(
         FixedArrayBase::cast(object->elements())->length()), isolate);
@@ -13959,7 +13935,6 @@ Handle<Object> JSObject::PrepareElementsForSort(Handle<JSObject> object,
 ExternalArrayType JSTypedArray::type() {
   switch (elements()->map()->instance_type()) {
 #define INSTANCE_TYPE_TO_ARRAY_TYPE(Type, type, TYPE, ctype, size)            \
-    case EXTERNAL_##TYPE##_ARRAY_TYPE:                                        \
     case FIXED_##TYPE##_ARRAY_TYPE:                                           \
       return kExternal##Type##Array;
 
@@ -13975,9 +13950,9 @@ ExternalArrayType JSTypedArray::type() {
 
 size_t JSTypedArray::element_size() {
   switch (elements()->map()->instance_type()) {
-#define INSTANCE_TYPE_TO_ELEMENT_SIZE(Type, type, TYPE, ctype, size)          \
-    case EXTERNAL_##TYPE##_ARRAY_TYPE:                                        \
-      return size;
+#define INSTANCE_TYPE_TO_ELEMENT_SIZE(Type, type, TYPE, ctype, size) \
+  case FIXED_##TYPE##_ARRAY_TYPE:                                    \
+    return size;
 
     TYPED_ARRAYS(INSTANCE_TYPE_TO_ELEMENT_SIZE)
 #undef INSTANCE_TYPE_TO_ELEMENT_SIZE
@@ -13995,131 +13970,6 @@ void FixedArray::SetValue(uint32_t index, Object* value) { set(index, value); }
 void FixedDoubleArray::SetValue(uint32_t index, Object* value) {
   set(index, value->Number());
 }
-
-
-void ExternalUint8ClampedArray::SetValue(uint32_t index, Object* value) {
-  uint8_t clamped_value = 0;
-  if (value->IsSmi()) {
-    int int_value = Smi::cast(value)->value();
-    if (int_value < 0) {
-      clamped_value = 0;
-    } else if (int_value > 255) {
-      clamped_value = 255;
-    } else {
-      clamped_value = static_cast<uint8_t>(int_value);
-    }
-  } else if (value->IsHeapNumber()) {
-    double double_value = HeapNumber::cast(value)->value();
-    if (!(double_value > 0)) {
-      // NaN and less than zero clamp to zero.
-      clamped_value = 0;
-    } else if (double_value > 255) {
-      // Greater than 255 clamp to 255.
-      clamped_value = 255;
-    } else {
-      // Other doubles are rounded to the nearest integer.
-      clamped_value = static_cast<uint8_t>(lrint(double_value));
-    }
-  } else {
-    // Clamp undefined to zero (default). All other types have been
-    // converted to a number type further up in the call chain.
-    DCHECK(value->IsUndefined());
-  }
-  set(index, clamped_value);
-}
-
-
-template <typename ExternalArrayClass, typename ValueType>
-static void ExternalArrayIntSetter(ExternalArrayClass* receiver, uint32_t index,
-                                   Object* value) {
-  ValueType cast_value = 0;
-  if (value->IsSmi()) {
-    int int_value = Smi::cast(value)->value();
-    cast_value = static_cast<ValueType>(int_value);
-  } else if (value->IsHeapNumber()) {
-    double double_value = HeapNumber::cast(value)->value();
-    cast_value = static_cast<ValueType>(DoubleToInt32(double_value));
-  } else {
-    // Clamp undefined to zero (default). All other types have been
-    // converted to a number type further up in the call chain.
-    DCHECK(value->IsUndefined());
-  }
-  receiver->set(index, cast_value);
-}
-
-
-void ExternalInt8Array::SetValue(uint32_t index, Object* value) {
-  ExternalArrayIntSetter<ExternalInt8Array, int8_t>(this, index, value);
-}
-
-
-void ExternalUint8Array::SetValue(uint32_t index, Object* value) {
-  ExternalArrayIntSetter<ExternalUint8Array, uint8_t>(this, index, value);
-}
-
-
-void ExternalInt16Array::SetValue(uint32_t index, Object* value) {
-  ExternalArrayIntSetter<ExternalInt16Array, int16_t>(this, index, value);
-}
-
-
-void ExternalUint16Array::SetValue(uint32_t index, Object* value) {
-  ExternalArrayIntSetter<ExternalUint16Array, uint16_t>(this, index, value);
-}
-
-
-void ExternalInt32Array::SetValue(uint32_t index, Object* value) {
-  ExternalArrayIntSetter<ExternalInt32Array, int32_t>(this, index, value);
-}
-
-
-void ExternalUint32Array::SetValue(uint32_t index, Object* value) {
-  uint32_t cast_value = 0;
-  if (value->IsSmi()) {
-    int int_value = Smi::cast(value)->value();
-    cast_value = static_cast<uint32_t>(int_value);
-  } else if (value->IsHeapNumber()) {
-    double double_value = HeapNumber::cast(value)->value();
-    cast_value = static_cast<uint32_t>(DoubleToUint32(double_value));
-  } else {
-    // Clamp undefined to zero (default). All other types have been
-    // converted to a number type further up in the call chain.
-    DCHECK(value->IsUndefined());
-  }
-  set(index, cast_value);
-}
-
-
-void ExternalFloat32Array::SetValue(uint32_t index, Object* value) {
-  float cast_value = std::numeric_limits<float>::quiet_NaN();
-  if (value->IsSmi()) {
-    int int_value = Smi::cast(value)->value();
-    cast_value = static_cast<float>(int_value);
-  } else if (value->IsHeapNumber()) {
-    double double_value = HeapNumber::cast(value)->value();
-    cast_value = static_cast<float>(double_value);
-  } else {
-    // Clamp undefined to NaN (default). All other types have been
-    // converted to a number type further up in the call chain.
-    DCHECK(value->IsUndefined());
-  }
-  set(index, cast_value);
-}
-
-
-void ExternalFloat64Array::SetValue(uint32_t index, Object* value) {
-  double double_value = std::numeric_limits<double>::quiet_NaN();
-  if (value->IsNumber()) {
-    double_value = value->Number();
-  } else {
-    // Clamp undefined to NaN (default). All other types have been
-    // converted to a number type further up in the call chain.
-    DCHECK(value->IsUndefined());
-  }
-  set(index, double_value);
-}
-
-
 void GlobalObject::InvalidatePropertyCell(Handle<GlobalObject> global,
                                           Handle<Name> name) {
   DCHECK(!global->HasFastProperties());
@@ -15731,21 +15581,6 @@ void JSArrayBuffer::Neuter() {
 }
 
 
-static ElementsKind FixedToExternalElementsKind(ElementsKind elements_kind) {
-  switch (elements_kind) {
-#define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size)                       \
-    case TYPE##_ELEMENTS: return EXTERNAL_##TYPE##_ELEMENTS;
-
-    TYPED_ARRAYS(TYPED_ARRAY_CASE)
-#undef TYPED_ARRAY_CASE
-
-    default:
-      UNREACHABLE();
-      return FIRST_EXTERNAL_ARRAY_ELEMENTS_KIND;
-  }
-}
-
-
 Handle<JSArrayBuffer> JSTypedArray::MaterializeArrayBuffer(
     Handle<JSTypedArray> typed_array) {
 
@@ -15754,10 +15589,6 @@ Handle<JSArrayBuffer> JSTypedArray::MaterializeArrayBuffer(
 
   DCHECK(IsFixedTypedArrayElementsKind(map->elements_kind()));
 
-  Handle<Map> new_map = Map::TransitionElementsTo(
-          map,
-          FixedToExternalElementsKind(map->elements_kind()));
-
   Handle<FixedTypedArrayBase> fixed_typed_array(
       FixedTypedArrayBase::cast(typed_array->elements()));
 
@@ -15774,21 +15605,23 @@ Handle<JSArrayBuffer> JSTypedArray::MaterializeArrayBuffer(
   memcpy(buffer->backing_store(),
          fixed_typed_array->DataPtr(),
          fixed_typed_array->DataSize());
-  Handle<ExternalArray> new_elements =
-      isolate->factory()->NewExternalArray(
+  Handle<FixedTypedArrayBase> new_elements =
+      isolate->factory()->NewFixedTypedArrayWithExternalPointer(
           fixed_typed_array->length(), typed_array->type(),
           static_cast<uint8_t*>(buffer->backing_store()));
 
-  JSObject::SetMapAndElements(typed_array, new_map, new_elements);
+  typed_array->set_elements(*new_elements);
 
   return buffer;
 }
 
 
 Handle<JSArrayBuffer> JSTypedArray::GetBuffer() {
-  if (IsExternalArrayElementsKind(map()->elements_kind())) {
-    Handle<Object> result(buffer(), GetIsolate());
-    return Handle<JSArrayBuffer>::cast(result);
+  Handle<JSArrayBuffer> array_buffer(JSArrayBuffer::cast(buffer()),
+                                     GetIsolate());
+  if (array_buffer->was_neutered() ||
+      array_buffer->backing_store() != nullptr) {
+    return array_buffer;
   }
   Handle<JSTypedArray> self(this);
   return MaterializeArrayBuffer(self);
diff --git a/src/objects.h b/src/objects.h
index 9d3a062..a4b3e4f 100644
--- a/src/objects.h
+++ b/src/objects.h
@@ -93,15 +93,6 @@
 //         - ScriptContextTable
 //         - WeakFixedArray
 //       - FixedDoubleArray
-//       - ExternalArray
-//         - ExternalUint8ClampedArray
-//         - ExternalInt8Array
-//         - ExternalUint8Array
-//         - ExternalInt16Array
-//         - ExternalUint16Array
-//         - ExternalInt32Array
-//         - ExternalUint32Array
-//         - ExternalFloat32Array
 //     - Name
 //       - String
 //         - SeqString
@@ -392,18 +383,6 @@ const int kStubMinorKeyBits = kSmiValueSize - kStubMajorKeyBits - 1;
   V(BYTE_ARRAY_TYPE)                                            \
   V(BYTECODE_ARRAY_TYPE)                                        \
   V(FREE_SPACE_TYPE)                                            \
-  /* Note: the order of these external array */                 \
-  /* types is relied upon in */                                 \
-  /* Object::IsExternalArray(). */                              \
-  V(EXTERNAL_INT8_ARRAY_TYPE)                                   \
-  V(EXTERNAL_UINT8_ARRAY_TYPE)                                  \
-  V(EXTERNAL_INT16_ARRAY_TYPE)                                  \
-  V(EXTERNAL_UINT16_ARRAY_TYPE)                                 \
-  V(EXTERNAL_INT32_ARRAY_TYPE)                                  \
-  V(EXTERNAL_UINT32_ARRAY_TYPE)                                 \
-  V(EXTERNAL_FLOAT32_ARRAY_TYPE)                                \
-  V(EXTERNAL_FLOAT64_ARRAY_TYPE)                                \
-  V(EXTERNAL_UINT8_CLAMPED_ARRAY_TYPE)                          \
                                                                 \
   V(FIXED_INT8_ARRAY_TYPE)                                      \
   V(FIXED_UINT8_ARRAY_TYPE)                                     \
@@ -689,15 +668,6 @@ enum InstanceType {
   BYTE_ARRAY_TYPE,
   BYTECODE_ARRAY_TYPE,
   FREE_SPACE_TYPE,
-  EXTERNAL_INT8_ARRAY_TYPE,  // FIRST_EXTERNAL_ARRAY_TYPE
-  EXTERNAL_UINT8_ARRAY_TYPE,
-  EXTERNAL_INT16_ARRAY_TYPE,
-  EXTERNAL_UINT16_ARRAY_TYPE,
-  EXTERNAL_INT32_ARRAY_TYPE,
-  EXTERNAL_UINT32_ARRAY_TYPE,
-  EXTERNAL_FLOAT32_ARRAY_TYPE,
-  EXTERNAL_FLOAT64_ARRAY_TYPE,
-  EXTERNAL_UINT8_CLAMPED_ARRAY_TYPE,  // LAST_EXTERNAL_ARRAY_TYPE
   FIXED_INT8_ARRAY_TYPE,              // FIRST_FIXED_TYPED_ARRAY_TYPE
   FIXED_UINT8_ARRAY_TYPE,
   FIXED_INT16_ARRAY_TYPE,
@@ -780,9 +750,6 @@ enum InstanceType {
   // Boundaries for testing for a SIMD type.
   FIRST_SIMD_TYPE = FLOAT32X4_TYPE,
   LAST_SIMD_TYPE = FLOAT32X4_TYPE,
-  // Boundaries for testing for an external array.
-  FIRST_EXTERNAL_ARRAY_TYPE = EXTERNAL_INT8_ARRAY_TYPE,
-  LAST_EXTERNAL_ARRAY_TYPE = EXTERNAL_UINT8_CLAMPED_ARRAY_TYPE,
   // Boundaries for testing for a fixed typed array.
   FIRST_FIXED_TYPED_ARRAY_TYPE = FIXED_INT8_ARRAY_TYPE,
   LAST_FIXED_TYPED_ARRAY_TYPE = FIXED_UINT8_CLAMPED_ARRAY_TYPE,
@@ -812,9 +779,6 @@ enum InstanceType {
   NUM_OF_CALLABLE_SPEC_OBJECT_TYPES = 2
 };
 
-const int kExternalArrayTypeCount =
-    LAST_EXTERNAL_ARRAY_TYPE - FIRST_EXTERNAL_ARRAY_TYPE + 1;
-
 STATIC_ASSERT(JS_OBJECT_TYPE == Internals::kJSObjectType);
 STATIC_ASSERT(FIRST_NONSTRING_TYPE == Internals::kFirstNonstringType);
 STATIC_ASSERT(ODDBALL_TYPE == Internals::kOddballType);
@@ -933,16 +897,6 @@ template <class C> inline bool Is(Object* obj);
   V(InternalizedString)            \
   V(Symbol)                        \
                                    \
-  V(ExternalArray)                 \
-  V(ExternalInt8Array)             \
-  V(ExternalUint8Array)            \
-  V(ExternalInt16Array)            \
-  V(ExternalUint16Array)           \
-  V(ExternalInt32Array)            \
-  V(ExternalUint32Array)           \
-  V(ExternalFloat32Array)          \
-  V(ExternalFloat64Array)          \
-  V(ExternalUint8ClampedArray)     \
   V(FixedTypedArrayBase)           \
   V(FixedUint8Array)               \
   V(FixedInt8Array)                \
@@ -1772,9 +1726,8 @@ class JSObject: public JSReceiver {
   // writing to any element the array must be copied. Use
   // EnsureWritableFastElements in this case.
   //
-  // In the slow mode the elements is either a NumberDictionary, an
-  // ExternalArray, or a FixedArray parameter map for a (sloppy)
-  // arguments object.
+  // In the slow mode the elements is either a NumberDictionary, a
+  // FixedArray parameter map for a (sloppy) arguments object.
   DECL_ACCESSORS(elements, FixedArrayBase)
   inline void initialize_elements();
   static void ResetElements(Handle<JSObject> object);
@@ -1801,17 +1754,6 @@ class JSObject: public JSReceiver {
   inline bool HasSloppyArgumentsElements();
   inline bool HasDictionaryElements();
 
-  inline bool HasExternalUint8ClampedElements();
-  inline bool HasExternalArrayElements();
-  inline bool HasExternalInt8Elements();
-  inline bool HasExternalUint8Elements();
-  inline bool HasExternalInt16Elements();
-  inline bool HasExternalUint16Elements();
-  inline bool HasExternalInt32Elements();
-  inline bool HasExternalUint32Elements();
-  inline bool HasExternalFloat32Elements();
-  inline bool HasExternalFloat64Elements();
-
   inline bool HasFixedTypedArrayElements();
 
   inline bool HasFixedUint8ClampedElements();
@@ -4334,261 +4276,14 @@ class FreeSpace: public HeapObject {
   V(Uint8Clamped, uint8_clamped, UINT8_CLAMPED, uint8_t, 1)
 
 
-
-// An ExternalArray represents a fixed-size array of primitive values
-// which live outside the JavaScript heap. Its subclasses are used to
-// implement the CanvasArray types being defined in the WebGL
-// specification. As of this writing the first public draft is not yet
-// available, but Khronos members can access the draft at:
-//   https://cvs.khronos.org/svn/repos/3dweb/trunk/doc/spec/WebGL-spec.html
-//
-// The semantics of these arrays differ from CanvasPixelArray.
-// Out-of-range values passed to the setter are converted via a C
-// cast, not clamping. Out-of-range indices cause exceptions to be
-// raised rather than being silently ignored.
-class ExternalArray: public FixedArrayBase {
- public:
-  inline bool is_the_hole(int index) { return false; }
-
-  // [external_pointer]: The pointer to the external memory area backing this
-  // external array.
-  DECL_ACCESSORS(external_pointer, void)  // Pointer to the data store.
-
-  DECLARE_CAST(ExternalArray)
-
-  // Maximal acceptable length for an external array.
-  static const int kMaxLength = 0x3fffffff;
-
-  // ExternalArray headers are not quadword aligned.
-  static const int kExternalPointerOffset =
-      POINTER_SIZE_ALIGN(FixedArrayBase::kLengthOffset + kPointerSize);
-  static const int kSize = kExternalPointerOffset + kPointerSize;
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalArray);
-};
-
-
-// A ExternalUint8ClampedArray represents a fixed-size byte array with special
-// semantics used for implementing the CanvasPixelArray object. Please see the
-// specification at:
-
-// http://www.whatwg.org/specs/web-apps/current-work/
-//                      multipage/the-canvas-element.html#canvaspixelarray
-// In particular, write access clamps the value written to 0 or 255 if the
-// value written is outside this range.
-class ExternalUint8ClampedArray: public ExternalArray {
- public:
-  inline uint8_t* external_uint8_clamped_pointer();
-
-  // Setter and getter.
-  inline uint8_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalUint8ClampedArray> array,
-                                   int index);
-  inline void set(int index, uint8_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined and clamps the converted value between 0 and 255.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalUint8ClampedArray)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalUint8ClampedArray)
-  DECLARE_VERIFIER(ExternalUint8ClampedArray)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUint8ClampedArray);
-};
-
-
-class ExternalInt8Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline int8_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalInt8Array> array, int index);
-  inline void set(int index, int8_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalInt8Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalInt8Array)
-  DECLARE_VERIFIER(ExternalInt8Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalInt8Array);
-};
-
-
-class ExternalUint8Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline uint8_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalUint8Array> array, int index);
-  inline void set(int index, uint8_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalUint8Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalUint8Array)
-  DECLARE_VERIFIER(ExternalUint8Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUint8Array);
-};
-
-
-class ExternalInt16Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline int16_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalInt16Array> array, int index);
-  inline void set(int index, int16_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalInt16Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalInt16Array)
-  DECLARE_VERIFIER(ExternalInt16Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalInt16Array);
-};
-
-
-class ExternalUint16Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline uint16_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalUint16Array> array,
-                                   int index);
-  inline void set(int index, uint16_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalUint16Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalUint16Array)
-  DECLARE_VERIFIER(ExternalUint16Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUint16Array);
-};
-
-
-class ExternalInt32Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline int32_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalInt32Array> array, int index);
-  inline void set(int index, int32_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalInt32Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalInt32Array)
-  DECLARE_VERIFIER(ExternalInt32Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalInt32Array);
-};
-
-
-class ExternalUint32Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline uint32_t get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalUint32Array> array,
-                                   int index);
-  inline void set(int index, uint32_t value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalUint32Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalUint32Array)
-  DECLARE_VERIFIER(ExternalUint32Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalUint32Array);
-};
-
-
-class ExternalFloat32Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline float get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalFloat32Array> array,
-                                   int index);
-  inline void set(int index, float value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalFloat32Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalFloat32Array)
-  DECLARE_VERIFIER(ExternalFloat32Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalFloat32Array);
-};
-
-
-class ExternalFloat64Array: public ExternalArray {
- public:
-  // Setter and getter.
-  inline double get_scalar(int index);
-  static inline Handle<Object> get(Handle<ExternalFloat64Array> array,
-                                   int index);
-  inline void set(int index, double value);
-
-  // This accessor applies the correct conversion from Smi, HeapNumber
-  // and undefined.
-  void SetValue(uint32_t index, Object* value);
-
-  DECLARE_CAST(ExternalFloat64Array)
-
-  // Dispatched behavior.
-  DECLARE_PRINTER(ExternalFloat64Array)
-  DECLARE_VERIFIER(ExternalFloat64Array)
-
- private:
-  DISALLOW_IMPLICIT_CONSTRUCTORS(ExternalFloat64Array);
-};
-
-
 class FixedTypedArrayBase: public FixedArrayBase {
  public:
-  // [base_pointer]: For now, points to the FixedTypedArrayBase itself.
+  // [base_pointer]: Either points to the FixedTypedArrayBase itself or nullptr.
   DECL_ACCESSORS(base_pointer, Object)
 
-  // [external_pointer]: For now, contains the offset between base_pointer and
-  // the start of the data.
+  // [external_pointer]: Contains the offset between base_pointer and the start
+  // of the data. If the base_pointer is a nullptr, the external_pointer
+  // therefore points to the actual backing store.
   DECL_ACCESSORS(external_pointer, void)
 
   // Dispatched behavior.
@@ -5739,10 +5434,6 @@ class Map: public HeapObject {
     return IsSloppyArgumentsElements(elements_kind());
   }
 
-  inline bool has_external_array_elements() {
-    return IsExternalArrayElementsKind(elements_kind());
-  }
-
   inline bool has_fixed_typed_array_elements() {
     return IsFixedTypedArrayElementsKind(elements_kind());
   }
diff --git a/src/ppc/lithium-codegen-ppc.cc b/src/ppc/lithium-codegen-ppc.cc
index bb7287c..dc9790b 100644
--- a/src/ppc/lithium-codegen-ppc.cc
+++ b/src/ppc/lithium-codegen-ppc.cc
@@ -3297,10 +3297,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
   bool key_is_smi = instr->hydrogen()->key()->representation().IsSmi();
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     DoubleRegister result = ToDoubleRegister(instr->result());
     if (key_is_constant) {
       __ Add(scratch0(), external_pointer, constant_key << element_size_shift,
@@ -3309,8 +3306,7 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       __ IndexToArrayOffset(r0, key, element_size_shift, key_is_smi);
       __ add(scratch0(), external_pointer, r0);
     }
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ lfs(result, MemOperand(scratch0(), base_offset));
     } else {  // i.e. elements_kind == EXTERNAL_DOUBLE_ELEMENTS
       __ lfd(result, MemOperand(scratch0(), base_offset));
@@ -3321,7 +3317,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         PrepareKeyedOperand(key, external_pointer, key_is_constant, key_is_smi,
                             constant_key, element_size_shift, base_offset);
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         if (key_is_constant) {
           __ LoadByte(result, mem_operand, r0);
@@ -3330,8 +3325,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         }
         __ extsb(result, result);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         if (key_is_constant) {
@@ -3340,7 +3333,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           __ lbzx(result, mem_operand);
         }
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         if (key_is_constant) {
           __ LoadHalfWordArith(result, mem_operand, r0);
@@ -3348,7 +3340,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           __ lhax(result, mem_operand);
         }
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         if (key_is_constant) {
           __ LoadHalfWord(result, mem_operand, r0);
@@ -3356,7 +3347,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           __ lhzx(result, mem_operand);
         }
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         if (key_is_constant) {
           __ LoadWordArith(result, mem_operand, r0);
@@ -3364,7 +3354,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           __ lwax(result, mem_operand);
         }
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         if (key_is_constant) {
           __ LoadWord(result, mem_operand, r0);
@@ -3379,8 +3368,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_HOLEY_DOUBLE_ELEMENTS:
       case FAST_HOLEY_ELEMENTS:
       case FAST_HOLEY_SMI_ELEMENTS:
@@ -3517,7 +3504,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4571,10 +4558,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
   bool key_is_smi = instr->hydrogen()->key()->representation().IsSmi();
   int base_offset = instr->base_offset();
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-      elements_kind == FLOAT64_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS || elements_kind == FLOAT64_ELEMENTS) {
     Register address = scratch0();
     DoubleRegister value(ToDoubleRegister(instr->value()));
     if (key_is_constant) {
@@ -4588,8 +4572,7 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       __ IndexToArrayOffset(r0, key, element_size_shift, key_is_smi);
       __ add(address, external_pointer, r0);
     }
-    if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-        elements_kind == FLOAT32_ELEMENTS) {
+    if (elements_kind == FLOAT32_ELEMENTS) {
       __ frsp(double_scratch0(), value);
       __ stfs(double_scratch0(), MemOperand(address, base_offset));
     } else {  // Storing doubles, not floats.
@@ -4601,9 +4584,6 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
         PrepareKeyedOperand(key, external_pointer, key_is_constant, key_is_smi,
                             constant_key, element_size_shift, base_offset);
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
       case INT8_ELEMENTS:
@@ -4613,8 +4593,6 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
           __ stbx(value, mem_operand);
         }
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         if (key_is_constant) {
@@ -4623,8 +4601,6 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
           __ sthx(value, mem_operand);
         }
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         if (key_is_constant) {
@@ -4635,8 +4611,6 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
         break;
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FAST_DOUBLE_ELEMENTS:
       case FAST_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4754,7 +4728,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases: external, fast double
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/ppc/lithium-ppc.cc b/src/ppc/lithium-ppc.cc
index 92dc76b..19ea818 100644
--- a/src/ppc/lithium-ppc.cc
+++ b/src/ppc/lithium-ppc.cc
@@ -2198,7 +2198,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   LOperand* key = UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = NULL;
     if (instr->representation().IsDouble()) {
       obj = UseRegister(instr->elements());
@@ -2216,10 +2216,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2253,7 +2252,7 @@ LInstruction* LChunkBuilder::DoLoadKeyedGeneric(HLoadKeyedGeneric* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
diff --git a/src/ppc/lithium-ppc.h b/src/ppc/lithium-ppc.h
index f2426d0..dbf9803 100644
--- a/src/ppc/lithium-ppc.h
+++ b/src/ppc/lithium-ppc.h
@@ -1587,13 +1587,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   ElementsKind elements_kind() const { return hydrogen()->elements_kind(); }
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -2168,13 +2164,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/runtime/runtime-array.cc b/src/runtime/runtime-array.cc
index af2d4c5..b5655db 100644
--- a/src/runtime/runtime-array.cc
+++ b/src/runtime/runtime-array.cc
@@ -298,7 +298,6 @@ static uint32_t EstimateElementCount(Handle<JSArray> array) {
     case FAST_SLOPPY_ARGUMENTS_ELEMENTS:
     case SLOW_SLOPPY_ARGUMENTS_ELEMENTS:
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
-  case EXTERNAL_##TYPE##_ELEMENTS:                      \
   case TYPE##_ELEMENTS:
 
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
@@ -418,7 +417,6 @@ static void CollectElementIndices(Handle<JSObject> object, uint32_t range,
     }
 #define TYPED_ARRAY_CASE(Type, type, TYPE, ctype, size) \
   case TYPE##_ELEMENTS:                                 \
-  case EXTERNAL_##TYPE##_ELEMENTS:
 
       TYPED_ARRAYS(TYPED_ARRAY_CASE)
 #undef TYPED_ARRAY_CASE
@@ -610,15 +608,6 @@ static bool IterateElements(Isolate* isolate, Handle<JSObject> receiver,
       }
       break;
     }
-    case EXTERNAL_UINT8_CLAMPED_ELEMENTS: {
-      Handle<ExternalUint8ClampedArray> pixels(
-          ExternalUint8ClampedArray::cast(receiver->elements()));
-      for (uint32_t j = 0; j < length; j++) {
-        Handle<Smi> e(Smi::FromInt(pixels->get_scalar(j)), isolate);
-        visitor->visit(j, e);
-      }
-      break;
-    }
     case UINT8_CLAMPED_ELEMENTS: {
       Handle<FixedUint8ClampedArray> pixels(
       FixedUint8ClampedArray::cast(receiver->elements()));
@@ -628,81 +617,41 @@ static bool IterateElements(Isolate* isolate, Handle<JSObject> receiver,
       }
       break;
     }
-    case EXTERNAL_INT8_ELEMENTS: {
-      IterateTypedArrayElements<ExternalInt8Array, int8_t>(
-          isolate, receiver, true, true, visitor);
-      break;
-    }
     case INT8_ELEMENTS: {
       IterateTypedArrayElements<FixedInt8Array, int8_t>(
       isolate, receiver, true, true, visitor);
       break;
     }
-    case EXTERNAL_UINT8_ELEMENTS: {
-      IterateTypedArrayElements<ExternalUint8Array, uint8_t>(
-          isolate, receiver, true, true, visitor);
-      break;
-    }
     case UINT8_ELEMENTS: {
       IterateTypedArrayElements<FixedUint8Array, uint8_t>(
       isolate, receiver, true, true, visitor);
       break;
     }
-    case EXTERNAL_INT16_ELEMENTS: {
-      IterateTypedArrayElements<ExternalInt16Array, int16_t>(
-          isolate, receiver, true, true, visitor);
-      break;
-    }
     case INT16_ELEMENTS: {
       IterateTypedArrayElements<FixedInt16Array, int16_t>(
       isolate, receiver, true, true, visitor);
       break;
     }
-    case EXTERNAL_UINT16_ELEMENTS: {
-      IterateTypedArrayElements<ExternalUint16Array, uint16_t>(
-          isolate, receiver, true, true, visitor);
-      break;
-    }
     case UINT16_ELEMENTS: {
       IterateTypedArrayElements<FixedUint16Array, uint16_t>(
       isolate, receiver, true, true, visitor);
       break;
     }
-    case EXTERNAL_INT32_ELEMENTS: {
-      IterateTypedArrayElements<ExternalInt32Array, int32_t>(
-          isolate, receiver, true, false, visitor);
-      break;
-    }
     case INT32_ELEMENTS: {
       IterateTypedArrayElements<FixedInt32Array, int32_t>(
       isolate, receiver, true, false, visitor);
       break;
     }
-    case EXTERNAL_UINT32_ELEMENTS: {
-      IterateTypedArrayElements<ExternalUint32Array, uint32_t>(
-          isolate, receiver, true, false, visitor);
-      break;
-    }
     case UINT32_ELEMENTS: {
       IterateTypedArrayElements<FixedUint32Array, uint32_t>(
       isolate, receiver, true, false, visitor);
       break;
     }
-    case EXTERNAL_FLOAT32_ELEMENTS: {
-      IterateTypedArrayElements<ExternalFloat32Array, float>(
-          isolate, receiver, false, false, visitor);
-      break;
-    }
     case FLOAT32_ELEMENTS: {
       IterateTypedArrayElements<FixedFloat32Array, float>(
       isolate, receiver, false, false, visitor);
       break;
     }
-    case EXTERNAL_FLOAT64_ELEMENTS: {
-      IterateTypedArrayElements<ExternalFloat64Array, double>(
-          isolate, receiver, false, false, visitor);
-      break;
-    }
     case FLOAT64_ELEMENTS: {
       IterateTypedArrayElements<FixedFloat64Array, double>(
       isolate, receiver, false, false, visitor);
@@ -1233,8 +1182,7 @@ RUNTIME_FUNCTION(Runtime_NormalizeElements) {
   HandleScope scope(isolate);
   DCHECK(args.length() == 1);
   CONVERT_ARG_HANDLE_CHECKED(JSObject, array, 0);
-  RUNTIME_ASSERT(!array->HasExternalArrayElements() &&
-                 !array->HasFixedTypedArrayElements() &&
+  RUNTIME_ASSERT(!array->HasFixedTypedArrayElements() &&
                  !array->IsJSGlobalProxy());
   JSObject::NormalizeElements(array);
   return *array;
diff --git a/src/runtime/runtime-test.cc b/src/runtime/runtime-test.cc
index 6422efd..7ae885e 100644
--- a/src/runtime/runtime-test.cc
+++ b/src/runtime/runtime-test.cc
@@ -480,24 +480,13 @@ ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastDoubleElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastHoleyElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(DictionaryElements)
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(SloppyArgumentsElements)
-ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(ExternalArrayElements)
+ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FixedTypedArrayElements)
 // Properties test sitting with elements tests - not fooling anyone.
 ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION(FastProperties)
 
 #undef ELEMENTS_KIND_CHECK_RUNTIME_FUNCTION
 
 
-#define TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION(Type, type, TYPE, ctype, size) \
-  RUNTIME_FUNCTION(Runtime_HasExternal##Type##Elements) {                  \
-    CONVERT_ARG_CHECKED(JSObject, obj, 0);                                 \
-    return isolate->heap()->ToBoolean(obj->HasExternal##Type##Elements()); \
-  }
-
-TYPED_ARRAYS(TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION)
-
-#undef TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION
-
-
 #define FIXED_TYPED_ARRAYS_CHECK_RUNTIME_FUNCTION(Type, type, TYPE, ctype, s) \
   RUNTIME_FUNCTION(Runtime_HasFixed##Type##Elements) {                        \
     CONVERT_ARG_CHECKED(JSObject, obj, 0);                                    \
diff --git a/src/runtime/runtime-typedarray.cc b/src/runtime/runtime-typedarray.cc
index 4d35524..bfb810e 100644
--- a/src/runtime/runtime-typedarray.cc
+++ b/src/runtime/runtime-typedarray.cc
@@ -159,14 +159,12 @@ RUNTIME_FUNCTION(Runtime_ArrayBufferNeuter) {
 
 
 void Runtime::ArrayIdToTypeAndSize(int arrayId, ExternalArrayType* array_type,
-                                   ElementsKind* external_elements_kind,
                                    ElementsKind* fixed_elements_kind,
                                    size_t* element_size) {
   switch (arrayId) {
 #define ARRAY_ID_CASE(Type, type, TYPE, ctype, size)      \
   case ARRAY_ID_##TYPE:                                   \
     *array_type = kExternal##Type##Array;                 \
-    *external_elements_kind = EXTERNAL_##TYPE##_ELEMENTS; \
     *fixed_elements_kind = TYPE##_ELEMENTS;               \
     *element_size = size;                                 \
     break;
@@ -195,11 +193,9 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitialize) {
 
   ExternalArrayType array_type = kExternalInt8Array;  // Bogus initialization.
   size_t element_size = 1;                            // Bogus initialization.
-  ElementsKind external_elements_kind =
-      EXTERNAL_INT8_ELEMENTS;                        // Bogus initialization.
   ElementsKind fixed_elements_kind = INT8_ELEMENTS;  // Bogus initialization.
-  Runtime::ArrayIdToTypeAndSize(arrayId, &array_type, &external_elements_kind,
-                                &fixed_elements_kind, &element_size);
+  Runtime::ArrayIdToTypeAndSize(arrayId, &array_type, &fixed_elements_kind,
+                                &element_size);
   RUNTIME_ASSERT(holder->map()->elements_kind() == fixed_elements_kind);
 
   size_t byte_offset = 0;
@@ -241,13 +237,11 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitialize) {
     Handle<JSArrayBuffer> buffer = Handle<JSArrayBuffer>::cast(maybe_buffer);
     holder->set_buffer(*buffer);
 
-    Handle<ExternalArray> elements = isolate->factory()->NewExternalArray(
-        static_cast<int>(length), array_type,
-        static_cast<uint8_t*>(buffer->backing_store()) + byte_offset);
-    Handle<Map> map =
-        JSObject::GetElementsTransitionMap(holder, external_elements_kind);
-    JSObject::SetMapAndElements(holder, map, elements);
-    DCHECK(IsExternalArrayElementsKind(holder->map()->elements_kind()));
+    Handle<FixedTypedArrayBase> elements =
+        isolate->factory()->NewFixedTypedArrayWithExternalPointer(
+            static_cast<int>(length), array_type,
+            static_cast<uint8_t*>(buffer->backing_store()) + byte_offset);
+    holder->set_elements(*elements);
   } else {
     Handle<JSArrayBuffer> buffer = isolate->factory()->NewJSArrayBuffer();
     Runtime::SetupArrayBuffer(isolate, buffer, true, NULL, byte_length,
@@ -280,11 +274,9 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitializeFromArrayLike) {
 
   ExternalArrayType array_type = kExternalInt8Array;  // Bogus initialization.
   size_t element_size = 1;                            // Bogus initialization.
-  ElementsKind external_elements_kind =
-      EXTERNAL_INT8_ELEMENTS;                        // Bogus intialization.
   ElementsKind fixed_elements_kind = INT8_ELEMENTS;  // Bogus initialization.
-  Runtime::ArrayIdToTypeAndSize(arrayId, &array_type, &external_elements_kind,
-                                &fixed_elements_kind, &element_size);
+  Runtime::ArrayIdToTypeAndSize(arrayId, &array_type, &fixed_elements_kind,
+                                &element_size);
 
   RUNTIME_ASSERT(holder->map()->elements_kind() == fixed_elements_kind);
 
@@ -340,12 +332,11 @@ RUNTIME_FUNCTION(Runtime_TypedArrayInitializeFromArrayLike) {
   holder->set_byte_length(*byte_length_obj);
   holder->set_length(*length_obj);
 
-  Handle<ExternalArray> elements = isolate->factory()->NewExternalArray(
-      static_cast<int>(length), array_type,
-      static_cast<uint8_t*>(buffer->backing_store()));
-  Handle<Map> map =
-      JSObject::GetElementsTransitionMap(holder, external_elements_kind);
-  JSObject::SetMapAndElements(holder, map, elements);
+  Handle<FixedTypedArrayBase> elements =
+      isolate->factory()->NewFixedTypedArrayWithExternalPointer(
+          static_cast<int>(length), array_type,
+          static_cast<uint8_t*>(buffer->backing_store()));
+  holder->set_elements(*elements);
 
   if (source->IsJSTypedArray()) {
     Handle<JSTypedArray> typed_array(JSTypedArray::cast(*source));
diff --git a/src/runtime/runtime.h b/src/runtime/runtime.h
index b393b77..18e8af7 100644
--- a/src/runtime/runtime.h
+++ b/src/runtime/runtime.h
@@ -658,17 +658,8 @@ namespace internal {
   F(HasFastHoleyElements, 1, 1)               \
   F(HasDictionaryElements, 1, 1)              \
   F(HasSloppyArgumentsElements, 1, 1)         \
-  F(HasExternalArrayElements, 1, 1)           \
+  F(HasFixedTypedArrayElements, 1, 1)         \
   F(HasFastProperties, 1, 1)                  \
-  F(HasExternalUint8Elements, 1, 1)           \
-  F(HasExternalInt8Elements, 1, 1)            \
-  F(HasExternalUint16Elements, 1, 1)          \
-  F(HasExternalInt16Elements, 1, 1)           \
-  F(HasExternalUint32Elements, 1, 1)          \
-  F(HasExternalInt32Elements, 1, 1)           \
-  F(HasExternalFloat32Elements, 1, 1)         \
-  F(HasExternalFloat64Elements, 1, 1)         \
-  F(HasExternalUint8ClampedElements, 1, 1)    \
   F(HasFixedUint8Elements, 1, 1)              \
   F(HasFixedInt8Elements, 1, 1)               \
   F(HasFixedUint16Elements, 1, 1)             \
@@ -927,7 +918,6 @@ class Runtime : public AllStatic {
   };
 
   static void ArrayIdToTypeAndSize(int array_id, ExternalArrayType* type,
-                                   ElementsKind* external_elements_kind,
                                    ElementsKind* fixed_elements_kind,
                                    size_t* element_size);
 
diff --git a/src/x64/lithium-codegen-x64.cc b/src/x64/lithium-codegen-x64.cc
index a4da708..fcb470d 100644
--- a/src/x64/lithium-codegen-x64.cc
+++ b/src/x64/lithium-codegen-x64.cc
@@ -3114,40 +3114,31 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       elements_kind,
       instr->base_offset()));
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     XMMRegister result(ToDoubleRegister(instr->result()));
     __ movss(result, operand);
     __ cvtss2sd(result, result);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     __ movsd(ToDoubleRegister(instr->result()), operand);
   } else {
     Register result(ToRegister(instr->result()));
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ movsxbl(result, operand);
         break;
-      case EXTERNAL_UINT8_ELEMENTS:
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ movzxbl(result, operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ movsxwl(result, operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ movzxwl(result, operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ movl(result, operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ movl(result, operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3155,8 +3146,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
         }
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_ELEMENTS:
@@ -3275,7 +3264,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4375,39 +4364,28 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       elements_kind,
       instr->base_offset()));
 
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     XMMRegister value(ToDoubleRegister(instr->value()));
     __ cvtsd2ss(value, value);
     __ movss(operand, value);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     __ movsd(operand, ToDoubleRegister(instr->value()));
   } else {
     Register value(ToRegister(instr->value()));
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case INT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ movb(operand, value);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case INT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ movw(operand, value);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case INT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ movl(operand, value);
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_ELEMENTS:
@@ -4531,7 +4509,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/x64/lithium-x64.cc b/src/x64/lithium-x64.cc
index 1782845..1640fe4 100644
--- a/src/x64/lithium-x64.cc
+++ b/src/x64/lithium-x64.cc
@@ -2238,7 +2238,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
     FindDehoistedKeyDefinitions(instr->key());
   }
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = UseRegisterAtStart(instr->elements());
     result = DefineAsRegister(new(zone()) LLoadKeyed(obj, key));
   } else {
@@ -2252,10 +2252,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2295,7 +2294,7 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
     FindDehoistedKeyDefinitions(instr->key());
   }
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     bool needs_write_barrier = instr->NeedsWriteBarrier();
     LOperand* object = NULL;
@@ -2330,10 +2329,8 @@ LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
        (instr->value()->representation().IsDouble() &&
        IsDoubleOrFloatElementsKind(elements_kind)));
   DCHECK(instr->elements()->representation().IsExternal());
-  bool val_is_temp_register =
-      elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
-      elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS;
+  bool val_is_temp_register = elements_kind == UINT8_CLAMPED_ELEMENTS ||
+                              elements_kind == FLOAT32_ELEMENTS;
   LOperand* val = val_is_temp_register ? UseTempRegister(instr->value())
       : UseRegister(instr->value());
   LOperand* key = NULL;
diff --git a/src/x64/lithium-x64.h b/src/x64/lithium-x64.h
index cd51a4d..2ba2486 100644
--- a/src/x64/lithium-x64.h
+++ b/src/x64/lithium-x64.h
@@ -1617,12 +1617,8 @@ inline static bool ExternalArrayOpRequiresTemp(
   // an index cannot fold the scale operation into a load and need an extra
   // temp register to do the work.
   return SmiValuesAre31Bits() && key_representation.IsSmi() &&
-      (elements_kind == EXTERNAL_INT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
-       elements_kind == UINT8_ELEMENTS ||
-       elements_kind == INT8_ELEMENTS ||
-       elements_kind == UINT8_CLAMPED_ELEMENTS);
+         (elements_kind == UINT8_ELEMENTS || elements_kind == INT8_ELEMENTS ||
+          elements_kind == UINT8_CLAMPED_ELEMENTS);
 }
 
 
@@ -1636,15 +1632,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
 
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   void PrintDataTo(StringStream* stream) override;
@@ -2233,13 +2223,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = value;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/src/x87/lithium-codegen-x87.cc b/src/x87/lithium-codegen-x87.cc
index bfb72b9..1c632ba 100644
--- a/src/x87/lithium-codegen-x87.cc
+++ b/src/x87/lithium-codegen-x87.cc
@@ -3342,38 +3342,29 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
       instr->hydrogen()->key()->representation(),
       elements_kind,
       instr->base_offset()));
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     X87Mov(ToX87Register(instr->result()), operand, kX87FloatOperand);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     X87Mov(ToX87Register(instr->result()), operand);
   } else {
     Register result(ToRegister(instr->result()));
     switch (elements_kind) {
-      case EXTERNAL_INT8_ELEMENTS:
       case INT8_ELEMENTS:
         __ movsx_b(result, operand);
         break;
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ movzx_b(result, operand);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ movsx_w(result, operand);
         break;
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
         __ movzx_w(result, operand);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ mov(result, operand);
         break;
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
         __ mov(result, operand);
         if (!instr->hydrogen()->CheckFlag(HInstruction::kUint32)) {
@@ -3381,8 +3372,6 @@ void LCodeGen::DoLoadKeyedExternalArray(LLoadKeyed* instr) {
           DeoptimizeIf(negative, instr, Deoptimizer::kNegativeValue);
         }
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -3461,7 +3450,7 @@ void LCodeGen::DoLoadKeyedFixedArray(LLoadKeyed* instr) {
 
 
 void LCodeGen::DoLoadKeyed(LLoadKeyed* instr) {
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoLoadKeyedExternalArray(instr);
   } else if (instr->hydrogen()->representation().IsDouble()) {
     DoLoadKeyedFixedDoubleArray(instr);
@@ -4606,11 +4595,9 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
       instr->hydrogen()->key()->representation(),
       elements_kind,
       instr->base_offset()));
-  if (elements_kind == EXTERNAL_FLOAT32_ELEMENTS ||
-      elements_kind == FLOAT32_ELEMENTS) {
+  if (elements_kind == FLOAT32_ELEMENTS) {
     X87Mov(operand, ToX87Register(instr->value()), kX87FloatOperand);
-  } else if (elements_kind == EXTERNAL_FLOAT64_ELEMENTS ||
-             elements_kind == FLOAT64_ELEMENTS) {
+  } else if (elements_kind == FLOAT64_ELEMENTS) {
     uint64_t int_val = kHoleNanInt64;
     int32_t lower = static_cast<int32_t>(int_val);
     int32_t upper = static_cast<int32_t>(int_val >> (kBitsPerInt));
@@ -4640,28 +4627,19 @@ void LCodeGen::DoStoreKeyedExternalArray(LStoreKeyed* instr) {
   } else {
     Register value = ToRegister(instr->value());
     switch (elements_kind) {
-      case EXTERNAL_UINT8_CLAMPED_ELEMENTS:
-      case EXTERNAL_UINT8_ELEMENTS:
-      case EXTERNAL_INT8_ELEMENTS:
       case UINT8_ELEMENTS:
       case INT8_ELEMENTS:
       case UINT8_CLAMPED_ELEMENTS:
         __ mov_b(operand, value);
         break;
-      case EXTERNAL_INT16_ELEMENTS:
-      case EXTERNAL_UINT16_ELEMENTS:
       case UINT16_ELEMENTS:
       case INT16_ELEMENTS:
         __ mov_w(operand, value);
         break;
-      case EXTERNAL_INT32_ELEMENTS:
-      case EXTERNAL_UINT32_ELEMENTS:
       case UINT32_ELEMENTS:
       case INT32_ELEMENTS:
         __ mov(operand, value);
         break;
-      case EXTERNAL_FLOAT32_ELEMENTS:
-      case EXTERNAL_FLOAT64_ELEMENTS:
       case FLOAT32_ELEMENTS:
       case FLOAT64_ELEMENTS:
       case FAST_SMI_ELEMENTS:
@@ -4777,7 +4755,7 @@ void LCodeGen::DoStoreKeyedFixedArray(LStoreKeyed* instr) {
 
 void LCodeGen::DoStoreKeyed(LStoreKeyed* instr) {
   // By cases...external, fast-double, fast
-  if (instr->is_typed_elements()) {
+  if (instr->is_fixed_typed_array()) {
     DoStoreKeyedExternalArray(instr);
   } else if (instr->hydrogen()->value()->representation().IsDouble()) {
     DoStoreKeyedFixedDoubleArray(instr);
diff --git a/src/x87/lithium-x87.cc b/src/x87/lithium-x87.cc
index 7a31cf6..affd36d 100644
--- a/src/x87/lithium-x87.cc
+++ b/src/x87/lithium-x87.cc
@@ -2237,7 +2237,7 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
       : UseRegisterOrConstantAtStart(instr->key());
   LInstruction* result = NULL;
 
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     LOperand* obj = UseRegisterAtStart(instr->elements());
     result = DefineAsRegister(new(zone()) LLoadKeyed(obj, key));
   } else {
@@ -2251,10 +2251,9 @@ LInstruction* LChunkBuilder::DoLoadKeyed(HLoadKeyed* instr) {
   }
 
   bool needs_environment;
-  if (instr->is_external() || instr->is_fixed_typed_array()) {
+  if (instr->is_fixed_typed_array()) {
     // see LCodeGen::DoLoadKeyedExternalArray
-    needs_environment = (elements_kind == EXTERNAL_UINT32_ELEMENTS ||
-                         elements_kind == UINT32_ELEMENTS) &&
+    needs_environment = elements_kind == UINT32_ELEMENTS &&
                         !instr->CheckFlag(HInstruction::kUint32);
   } else {
     // see LCodeGen::DoLoadKeyedFixedDoubleArray and
@@ -2291,9 +2290,6 @@ LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
 
   // Determine if we need a byte register in this case for the value.
   bool val_is_fixed_register =
-      elements_kind == EXTERNAL_INT8_ELEMENTS ||
-      elements_kind == EXTERNAL_UINT8_ELEMENTS ||
-      elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
       elements_kind == UINT8_ELEMENTS ||
       elements_kind == INT8_ELEMENTS ||
       elements_kind == UINT8_CLAMPED_ELEMENTS;
@@ -2310,7 +2306,7 @@ LOperand* LChunkBuilder::GetStoreKeyedValueOperand(HStoreKeyed* instr) {
 
 
 LInstruction* LChunkBuilder::DoStoreKeyed(HStoreKeyed* instr) {
-  if (!instr->is_typed_elements()) {
+  if (!instr->is_fixed_typed_array()) {
     DCHECK(instr->elements()->representation().IsTagged());
     DCHECK(instr->key()->representation().IsInteger32() ||
            instr->key()->representation().IsSmi());
diff --git a/src/x87/lithium-x87.h b/src/x87/lithium-x87.h
index 020ec53..3e6f67a 100644
--- a/src/x87/lithium-x87.h
+++ b/src/x87/lithium-x87.h
@@ -1649,15 +1649,9 @@ class LLoadKeyed final : public LTemplateInstruction<1, 2, 0> {
   ElementsKind elements_kind() const {
     return hydrogen()->elements_kind();
   }
-  bool is_external() const {
-    return hydrogen()->is_external();
-  }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
 
   DECLARE_CONCRETE_INSTRUCTION(LoadKeyed, "load-keyed")
   DECLARE_HYDROGEN_ACCESSOR(LoadKeyed)
@@ -1677,12 +1671,8 @@ inline static bool ExternalArrayOpRequiresTemp(
   // an index cannot fold the scale operation into a load and need an extra
   // temp register to do the work.
   return key_representation.IsSmi() &&
-      (elements_kind == EXTERNAL_INT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_ELEMENTS ||
-       elements_kind == EXTERNAL_UINT8_CLAMPED_ELEMENTS ||
-       elements_kind == UINT8_ELEMENTS ||
-       elements_kind == INT8_ELEMENTS ||
-       elements_kind == UINT8_CLAMPED_ELEMENTS);
+         (elements_kind == UINT8_ELEMENTS || elements_kind == INT8_ELEMENTS ||
+          elements_kind == UINT8_CLAMPED_ELEMENTS);
 }
 
 
@@ -2261,13 +2251,9 @@ class LStoreKeyed final : public LTemplateInstruction<0, 3, 0> {
     inputs_[2] = val;
   }
 
-  bool is_external() const { return hydrogen()->is_external(); }
   bool is_fixed_typed_array() const {
     return hydrogen()->is_fixed_typed_array();
   }
-  bool is_typed_elements() const {
-    return is_external() || is_fixed_typed_array();
-  }
   LOperand* elements() { return inputs_[0]; }
   LOperand* key() { return inputs_[1]; }
   LOperand* value() { return inputs_[2]; }
diff --git a/test/cctest/compiler/test-run-properties.cc b/test/cctest/compiler/test-run-properties.cc
index d4442f7..b7677f7 100644
--- a/test/cctest/compiler/test-run-properties.cc
+++ b/test/cctest/compiler/test-run-properties.cc
@@ -21,16 +21,15 @@ static void TypedArrayLoadHelper(const char* array_type) {
     values_builder.AddFormatted("a[%d] = 0x%08x;", i, kValues[i]);
   }
 
-  // Note that below source creates two different typed arrays with distinct
-  // elements kind to get coverage for both access patterns:
-  // - IsFixedTypedArrayElementsKind(x)
-  // - IsExternalArrayElementsKind(y)
+  // Note that below source creates two different typed arrays with the same
+  // elements kind to get coverage for both (on heap / with external backing
+  // store) access patterns.
   const char* source =
       "(function(a) {"
       "  var x = (a = new %sArray(%d)); %s;"
       "  var y = (a = new %sArray(%d)); %s; %%TypedArrayGetBuffer(y);"
       "  if (!%%HasFixed%sElements(x)) %%AbortJS('x');"
-      "  if (!%%HasExternal%sElements(y)) %%AbortJS('y');"
+      "  if (!%%HasFixed%sElements(y)) %%AbortJS('y');"
       "  function f(a,b) {"
       "    a = a | 0; b = b | 0;"
       "    return x[a] + y[b];"
@@ -84,16 +83,15 @@ static void TypedArrayStoreHelper(const char* array_type) {
     values_builder.AddFormatted("a[%d] = 0x%08x;", i, kValues[i]);
   }
 
-  // Note that below source creates two different typed arrays with distinct
-  // elements kind to get coverage for both access patterns:
-  // - IsFixedTypedArrayElementsKind(x)
-  // - IsExternalArrayElementsKind(y)
+  // Note that below source creates two different typed arrays with the same
+  // elements kind to get coverage for both (on heap/with external backing
+  // store) access patterns.
   const char* source =
       "(function(a) {"
       "  var x = (a = new %sArray(%d)); %s;"
       "  var y = (a = new %sArray(%d)); %s; %%TypedArrayGetBuffer(y);"
       "  if (!%%HasFixed%sElements(x)) %%AbortJS('x');"
-      "  if (!%%HasExternal%sElements(y)) %%AbortJS('y');"
+      "  if (!%%HasFixed%sElements(y)) %%AbortJS('y');"
       "  function f(a,b) {"
       "    a = a | 0; b = b | 0;"
       "    var t = x[a];"
diff --git a/test/cctest/test-api.cc b/test/cctest/test-api.cc
index df32722..f4d3463 100644
--- a/test/cctest/test-api.cc
+++ b/test/cctest/test-api.cc
@@ -14149,58 +14149,58 @@ void TypedArrayTestHelper(i::ExternalArrayType array_type, int64_t low,
 
 
 THREADED_TEST(Uint8Array) {
-  TypedArrayTestHelper<uint8_t, v8::Uint8Array, i::ExternalUint8Array,
+  TypedArrayTestHelper<uint8_t, v8::Uint8Array, i::FixedUint8Array,
                        v8::ArrayBuffer>(i::kExternalUint8Array, 0, 0xFF);
 }
 
 
 THREADED_TEST(Int8Array) {
-  TypedArrayTestHelper<int8_t, v8::Int8Array, i::ExternalInt8Array,
+  TypedArrayTestHelper<int8_t, v8::Int8Array, i::FixedInt8Array,
                        v8::ArrayBuffer>(i::kExternalInt8Array, -0x80, 0x7F);
 }
 
 
 THREADED_TEST(Uint16Array) {
-  TypedArrayTestHelper<uint16_t, v8::Uint16Array, i::ExternalUint16Array,
+  TypedArrayTestHelper<uint16_t, v8::Uint16Array, i::FixedUint16Array,
                        v8::ArrayBuffer>(i::kExternalUint16Array, 0, 0xFFFF);
 }
 
 
 THREADED_TEST(Int16Array) {
-  TypedArrayTestHelper<int16_t, v8::Int16Array, i::ExternalInt16Array,
+  TypedArrayTestHelper<int16_t, v8::Int16Array, i::FixedInt16Array,
                        v8::ArrayBuffer>(i::kExternalInt16Array, -0x8000,
                                         0x7FFF);
 }
 
 
 THREADED_TEST(Uint32Array) {
-  TypedArrayTestHelper<uint32_t, v8::Uint32Array, i::ExternalUint32Array,
+  TypedArrayTestHelper<uint32_t, v8::Uint32Array, i::FixedUint32Array,
                        v8::ArrayBuffer>(i::kExternalUint32Array, 0, UINT_MAX);
 }
 
 
 THREADED_TEST(Int32Array) {
-  TypedArrayTestHelper<int32_t, v8::Int32Array, i::ExternalInt32Array,
+  TypedArrayTestHelper<int32_t, v8::Int32Array, i::FixedInt32Array,
                        v8::ArrayBuffer>(i::kExternalInt32Array, INT_MIN,
                                         INT_MAX);
 }
 
 
 THREADED_TEST(Float32Array) {
-  TypedArrayTestHelper<float, v8::Float32Array, i::ExternalFloat32Array,
+  TypedArrayTestHelper<float, v8::Float32Array, i::FixedFloat32Array,
                        v8::ArrayBuffer>(i::kExternalFloat32Array, -500, 500);
 }
 
 
 THREADED_TEST(Float64Array) {
-  TypedArrayTestHelper<double, v8::Float64Array, i::ExternalFloat64Array,
+  TypedArrayTestHelper<double, v8::Float64Array, i::FixedFloat64Array,
                        v8::ArrayBuffer>(i::kExternalFloat64Array, -500, 500);
 }
 
 
 THREADED_TEST(Uint8ClampedArray) {
   TypedArrayTestHelper<uint8_t, v8::Uint8ClampedArray,
-                       i::ExternalUint8ClampedArray, v8::ArrayBuffer>(
+                       i::FixedUint8ClampedArray, v8::ArrayBuffer>(
       i::kExternalUint8ClampedArray, 0, 0xFF);
 }
 
@@ -14226,14 +14226,14 @@ THREADED_TEST(DataView) {
 
 THREADED_TEST(SharedUint8Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<uint8_t, v8::Uint8Array, i::ExternalUint8Array,
+  TypedArrayTestHelper<uint8_t, v8::Uint8Array, i::FixedUint8Array,
                        v8::SharedArrayBuffer>(i::kExternalUint8Array, 0, 0xFF);
 }
 
 
 THREADED_TEST(SharedInt8Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<int8_t, v8::Int8Array, i::ExternalInt8Array,
+  TypedArrayTestHelper<int8_t, v8::Int8Array, i::FixedInt8Array,
                        v8::SharedArrayBuffer>(i::kExternalInt8Array, -0x80,
                                               0x7F);
 }
@@ -14241,7 +14241,7 @@ THREADED_TEST(SharedInt8Array) {
 
 THREADED_TEST(SharedUint16Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<uint16_t, v8::Uint16Array, i::ExternalUint16Array,
+  TypedArrayTestHelper<uint16_t, v8::Uint16Array, i::FixedUint16Array,
                        v8::SharedArrayBuffer>(i::kExternalUint16Array, 0,
                                               0xFFFF);
 }
@@ -14249,7 +14249,7 @@ THREADED_TEST(SharedUint16Array) {
 
 THREADED_TEST(SharedInt16Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<int16_t, v8::Int16Array, i::ExternalInt16Array,
+  TypedArrayTestHelper<int16_t, v8::Int16Array, i::FixedInt16Array,
                        v8::SharedArrayBuffer>(i::kExternalInt16Array, -0x8000,
                                               0x7FFF);
 }
@@ -14257,7 +14257,7 @@ THREADED_TEST(SharedInt16Array) {
 
 THREADED_TEST(SharedUint32Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<uint32_t, v8::Uint32Array, i::ExternalUint32Array,
+  TypedArrayTestHelper<uint32_t, v8::Uint32Array, i::FixedUint32Array,
                        v8::SharedArrayBuffer>(i::kExternalUint32Array, 0,
                                               UINT_MAX);
 }
@@ -14265,7 +14265,7 @@ THREADED_TEST(SharedUint32Array) {
 
 THREADED_TEST(SharedInt32Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<int32_t, v8::Int32Array, i::ExternalInt32Array,
+  TypedArrayTestHelper<int32_t, v8::Int32Array, i::FixedInt32Array,
                        v8::SharedArrayBuffer>(i::kExternalInt32Array, INT_MIN,
                                               INT_MAX);
 }
@@ -14273,7 +14273,7 @@ THREADED_TEST(SharedInt32Array) {
 
 THREADED_TEST(SharedFloat32Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<float, v8::Float32Array, i::ExternalFloat32Array,
+  TypedArrayTestHelper<float, v8::Float32Array, i::FixedFloat32Array,
                        v8::SharedArrayBuffer>(i::kExternalFloat32Array, -500,
                                               500);
 }
@@ -14281,7 +14281,7 @@ THREADED_TEST(SharedFloat32Array) {
 
 THREADED_TEST(SharedFloat64Array) {
   i::FLAG_harmony_sharedarraybuffer = true;
-  TypedArrayTestHelper<double, v8::Float64Array, i::ExternalFloat64Array,
+  TypedArrayTestHelper<double, v8::Float64Array, i::FixedFloat64Array,
                        v8::SharedArrayBuffer>(i::kExternalFloat64Array, -500,
                                               500);
 }
@@ -14290,7 +14290,7 @@ THREADED_TEST(SharedFloat64Array) {
 THREADED_TEST(SharedUint8ClampedArray) {
   i::FLAG_harmony_sharedarraybuffer = true;
   TypedArrayTestHelper<uint8_t, v8::Uint8ClampedArray,
-                       i::ExternalUint8ClampedArray, v8::SharedArrayBuffer>(
+                       i::FixedUint8ClampedArray, v8::SharedArrayBuffer>(
       i::kExternalUint8ClampedArray, 0, 0xFF);
 }
 
diff --git a/test/mjsunit/elements-kind.js b/test/mjsunit/elements-kind.js
index cb2d178..4da8a9d 100644
--- a/test/mjsunit/elements-kind.js
+++ b/test/mjsunit/elements-kind.js
@@ -32,15 +32,6 @@ var elements_kind = {
   fast                      :  'fast elements',
   fast_double               :  'fast double elements',
   dictionary                :  'dictionary elements',
-  external_int32            :  'external int8 elements',
-  external_uint8            :  'external uint8 elements',
-  external_int16            :  'external int16 elements',
-  external_uint16           :  'external uint16 elements',
-  external_int32            :  'external int32 elements',
-  external_uint32           :  'external uint32 elements',
-  external_float32          :  'external float32 elements',
-  external_float64          :  'external float64 elements',
-  external_uint8_clamped    :  'external uint8_clamped elements',
   fixed_int32               :  'fixed int8 elements',
   fixed_uint8               :  'fixed uint8 elements',
   fixed_int16               :  'fixed int16 elements',
@@ -58,34 +49,6 @@ function getKind(obj) {
   if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
   if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
 
-  // Every external kind is also an external array.
-  if (%HasExternalInt8Elements(obj)) {
-    return elements_kind.external_int8;
-  }
-  if (%HasExternalUint8Elements(obj)) {
-    return elements_kind.external_uint8;
-  }
-  if (%HasExternalInt16Elements(obj)) {
-    return elements_kind.external_int16;
-  }
-  if (%HasExternalUint16Elements(obj)) {
-    return elements_kind.external_uint16;
-  }
-  if (%HasExternalInt32Elements(obj)) {
-    return elements_kind.external_int32;
-  }
-  if (%HasExternalUint32Elements(obj)) {
-    return elements_kind.external_uint32;
-  }
-  if (%HasExternalFloat32Elements(obj)) {
-    return elements_kind.external_float32;
-  }
-  if (%HasExternalFloat64Elements(obj)) {
-    return elements_kind.external_float64;
-  }
-  if (%HasExternalUint8ClampedElements(obj)) {
-    return elements_kind.external_uint8_clamped;
-  }
   if (%HasFixedInt8Elements(obj)) {
     return elements_kind.fixed_int8;
   }
@@ -164,15 +127,15 @@ function test_wrapper() {
   assertKind(elements_kind.fixed_uint8_clamped, new Uint8ClampedArray(512));
 
   var ab = new ArrayBuffer(128);
-  assertKind(elements_kind.external_int8,    new Int8Array(ab));
-  assertKind(elements_kind.external_uint8,   new Uint8Array(ab));
-  assertKind(elements_kind.external_int16,   new Int16Array(ab));
-  assertKind(elements_kind.external_uint16,  new Uint16Array(ab));
-  assertKind(elements_kind.external_int32,   new Int32Array(ab));
-  assertKind(elements_kind.external_uint32,  new Uint32Array(ab));
-  assertKind(elements_kind.external_float32, new Float32Array(ab));
-  assertKind(elements_kind.external_float64, new Float64Array(ab));
-  assertKind(elements_kind.external_uint8_clamped, new Uint8ClampedArray(ab));
+  assertKind(elements_kind.fixed_int8,    new Int8Array(ab));
+  assertKind(elements_kind.fixed_uint8,   new Uint8Array(ab));
+  assertKind(elements_kind.fixed_int16,   new Int16Array(ab));
+  assertKind(elements_kind.fixed_uint16,  new Uint16Array(ab));
+  assertKind(elements_kind.fixed_int32,   new Int32Array(ab));
+  assertKind(elements_kind.fixed_uint32,  new Uint32Array(ab));
+  assertKind(elements_kind.fixed_float32, new Float32Array(ab));
+  assertKind(elements_kind.fixed_float64, new Float64Array(ab));
+  assertKind(elements_kind.fixed_uint8_clamped, new Uint8ClampedArray(ab));
 
   // Crankshaft support for smi-only array elements.
   function monomorphic(array) {
diff --git a/test/mjsunit/opt-elements-kind.js b/test/mjsunit/opt-elements-kind.js
index 5f4f437..515305a 100644
--- a/test/mjsunit/opt-elements-kind.js
+++ b/test/mjsunit/opt-elements-kind.js
@@ -33,19 +33,19 @@
 // Flags: --stress-runs=2
 
 var elements_kind = {
-  fast_smi_only            :  'fast smi only elements',
-  fast                     :  'fast elements',
-  fast_double              :  'fast double elements',
-  dictionary               :  'dictionary elements',
-  external_byte            :  'external byte elements',
-  external_unsigned_byte   :  'external unsigned byte elements',
-  external_short           :  'external short elements',
-  external_unsigned_short  :  'external unsigned short elements',
-  external_int             :  'external int elements',
-  external_unsigned_int    :  'external unsigned int elements',
-  external_float           :  'external float elements',
-  external_double          :  'external double elements',
-  external_pixel           :  'external pixel elements'
+  fast_smi_only             :  'fast smi only elements',
+  fast                      :  'fast elements',
+  fast_double               :  'fast double elements',
+  dictionary                :  'dictionary elements',
+  fixed_int32               :  'fixed int8 elements',
+  fixed_uint8               :  'fixed uint8 elements',
+  fixed_int16               :  'fixed int16 elements',
+  fixed_uint16              :  'fixed uint16 elements',
+  fixed_int32               :  'fixed int32 elements',
+  fixed_uint32              :  'fixed uint32 elements',
+  fixed_float32             :  'fixed float32 elements',
+  fixed_float64             :  'fixed float64 elements',
+  fixed_uint8_clamped       :  'fixed uint8_clamped elements'
 }
 
 function getKind(obj) {
@@ -53,34 +53,33 @@ function getKind(obj) {
   if (%HasFastObjectElements(obj)) return elements_kind.fast;
   if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
   if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
-  // Every external kind is also an external array.
-  assertTrue(%HasExternalArrayElements(obj));
-  if (%HasExternalByteElements(obj)) {
-    return elements_kind.external_byte;
+
+  if (%HasFixedInt8Elements(obj)) {
+    return elements_kind.fixed_int8;
   }
-  if (%HasExternalUnsignedByteElements(obj)) {
-    return elements_kind.external_unsigned_byte;
+  if (%HasFixedUint8Elements(obj)) {
+    return elements_kind.fixed_uint8;
   }
-  if (%HasExternalShortElements(obj)) {
-    return elements_kind.external_short;
+  if (%HasFixedInt16Elements(obj)) {
+    return elements_kind.fixed_int16;
   }
-  if (%HasExternalUnsignedShortElements(obj)) {
-    return elements_kind.external_unsigned_short;
+  if (%HasFixedUint16Elements(obj)) {
+    return elements_kind.fixed_uint16;
   }
-  if (%HasExternalIntElements(obj)) {
-    return elements_kind.external_int;
+  if (%HasFixedInt32Elements(obj)) {
+    return elements_kind.fixed_int32;
   }
-  if (%HasExternalUnsignedIntElements(obj)) {
-    return elements_kind.external_unsigned_int;
+  if (%HasFixedUint32Elements(obj)) {
+    return elements_kind.fixed_uint32;
   }
-  if (%HasExternalFloatElements(obj)) {
-    return elements_kind.external_float;
+  if (%HasFixedFloat32Elements(obj)) {
+    return elements_kind.fixed_float32;
   }
-  if (%HasExternalDoubleElements(obj)) {
-    return elements_kind.external_double;
+  if (%HasFixedFloat64Elements(obj)) {
+    return elements_kind.fixed_float64;
   }
-  if (%HasExternalPixelElements(obj)) {
-    return elements_kind.external_pixel;
+  if (%HasFixedUint8ClampedElements(obj)) {
+    return elements_kind.fixed_uint8_clamped;
   }
 }
 
diff --git a/test/mjsunit/osr-elements-kind.js b/test/mjsunit/osr-elements-kind.js
index 389b6da..bd15ef3 100644
--- a/test/mjsunit/osr-elements-kind.js
+++ b/test/mjsunit/osr-elements-kind.js
@@ -33,19 +33,19 @@
 // Flags: --stress-runs=2
 
 var elements_kind = {
-  fast_smi_only            :  'fast smi only elements',
-  fast                     :  'fast elements',
-  fast_double              :  'fast double elements',
-  dictionary               :  'dictionary elements',
-  external_byte            :  'external byte elements',
-  external_unsigned_byte   :  'external unsigned byte elements',
-  external_short           :  'external short elements',
-  external_unsigned_short  :  'external unsigned short elements',
-  external_int             :  'external int elements',
-  external_unsigned_int    :  'external unsigned int elements',
-  external_float           :  'external float elements',
-  external_double          :  'external double elements',
-  external_pixel           :  'external pixel elements'
+  fast_smi_only             :  'fast smi only elements',
+  fast                      :  'fast elements',
+  fast_double               :  'fast double elements',
+  dictionary                :  'dictionary elements',
+  fixed_int32               :  'fixed int8 elements',
+  fixed_uint8               :  'fixed uint8 elements',
+  fixed_int16               :  'fixed int16 elements',
+  fixed_uint16              :  'fixed uint16 elements',
+  fixed_int32               :  'fixed int32 elements',
+  fixed_uint32              :  'fixed uint32 elements',
+  fixed_float32             :  'fixed float32 elements',
+  fixed_float64             :  'fixed float64 elements',
+  fixed_uint8_clamped       :  'fixed uint8_clamped elements'
 }
 
 function getKind(obj) {
@@ -53,34 +53,33 @@ function getKind(obj) {
   if (%HasFastObjectElements(obj)) return elements_kind.fast;
   if (%HasFastDoubleElements(obj)) return elements_kind.fast_double;
   if (%HasDictionaryElements(obj)) return elements_kind.dictionary;
-  // Every external kind is also an external array.
-  assertTrue(%HasExternalArrayElements(obj));
-  if (%HasExternalByteElements(obj)) {
-    return elements_kind.external_byte;
+
+  if (%HasFixedInt8Elements(obj)) {
+    return elements_kind.fixed_int8;
   }
-  if (%HasExternalUnsignedByteElements(obj)) {
-    return elements_kind.external_unsigned_byte;
+  if (%HasFixedUint8Elements(obj)) {
+    return elements_kind.fixed_uint8;
   }
-  if (%HasExternalShortElements(obj)) {
-    return elements_kind.external_short;
+  if (%HasFixedInt16Elements(obj)) {
+    return elements_kind.fixed_int16;
   }
-  if (%HasExternalUnsignedShortElements(obj)) {
-    return elements_kind.external_unsigned_short;
+  if (%HasFixedUint16Elements(obj)) {
+    return elements_kind.fixed_uint16;
   }
-  if (%HasExternalIntElements(obj)) {
-    return elements_kind.external_int;
+  if (%HasFixedInt32Elements(obj)) {
+    return elements_kind.fixed_int32;
   }
-  if (%HasExternalUnsignedIntElements(obj)) {
-    return elements_kind.external_unsigned_int;
+  if (%HasFixedUint32Elements(obj)) {
+    return elements_kind.fixed_uint32;
   }
-  if (%HasExternalFloatElements(obj)) {
-    return elements_kind.external_float;
+  if (%HasFixedFloat32Elements(obj)) {
+    return elements_kind.fixed_float32;
   }
-  if (%HasExternalDoubleElements(obj)) {
-    return elements_kind.external_double;
+  if (%HasFixedFloat64Elements(obj)) {
+    return elements_kind.fixed_float64;
   }
-  if (%HasExternalPixelElements(obj)) {
-    return elements_kind.external_pixel;
+  if (%HasFixedUint8ClampedElements(obj)) {
+    return elements_kind.fixed_uint8_clamped;
   }
 }