Prepare JSTypes for more Object subtypes

Prepare JSTypes for more Object subtypes
https://bugs.webkit.org/show_bug.cgi?id=68200

Reviewed by Gavin Barraclough.

* dfg/DFGJITCompiler.h:
(JSC::DFG::JITCompiler::branchIfNotObject):
* jit/JITInlineMethods.h:
(JSC::JIT::emitJumpIfNotObject):
* runtime/JSGlobalObject.h:
(JSC::Structure::prototypeForLookup):
* runtime/JSObject.h:
(JSC::JSObject::finishCreation):
* runtime/JSType.h:
* runtime/JSTypeInfo.h:
(JSC::TypeInfo::type):
(JSC::TypeInfo::isObject):
(JSC::TypeInfo::isFinal):
(JSC::TypeInfo::prohibitsPropertyCaching):
* runtime/NativeErrorConstructor.h:
(JSC::NativeErrorConstructor::finishCreation):
* runtime/Operations.cpp:
(JSC::jsIsObjectType):
* runtime/Structure.cpp:
(JSC::Structure::addPropertyTransitionToExistingStructure):
(JSC::Structure::addPropertyTransition):
* runtime/Structure.h:
(JSC::Structure::isObject):
(JSC::JSCell::isObject):

git-svn-id: http://svn.webkit.org/repository/webkit/trunk@95326 268f45cc-cd09-0410-ab3c-d52691b4dbfc