src/content/browser/renderer_host/render_widget_host_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/render_widget_host_impl.h"
   6
   7 #include <math.h>
   8 #include <set>
   9 #include <utility>
  10
  11 #include "base/auto_reset.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/containers/hash_tables.h"
  15 #include "base/debug/trace_event.h"
  16 #include "base/i18n/rtl.h"
  17 #include "base/lazy_instance.h"
  18 #include "base/message_loop/message_loop.h"
  19 #include "base/metrics/field_trial.h"
  20 #include "base/metrics/histogram.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "cc/base/switches.h"
  25 #include "cc/output/compositor_frame.h"
  26 #include "cc/output/compositor_frame_ack.h"
  27 #include "content/browser/accessibility/accessibility_mode_helper.h"
  28 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  29 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  30 #include "content/browser/gpu/compositor_util.h"
  31 #include "content/browser/gpu/gpu_process_host.h"
  32 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  33 #include "content/browser/gpu/gpu_surface_tracker.h"
  34 #include "content/browser/renderer_host/dip_util.h"
  35 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  36 #include "content/browser/renderer_host/input/input_router_impl.h"
  37 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  38 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  39 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  40 #include "content/browser/renderer_host/input/timeout_monitor.h"
  41 #include "content/browser/renderer_host/input/touch_emulator.h"
  42 #include "content/browser/renderer_host/render_process_host_impl.h"
  43 #include "content/browser/renderer_host/render_view_host_impl.h"
  44 #include "content/browser/renderer_host/render_widget_helper.h"
  45 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  46 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  47 #include "content/common/accessibility_messages.h"
  48 #include "content/common/content_constants_internal.h"
  49 #include "content/common/cursors/webcursor.h"
  50 #include "content/common/gpu/gpu_messages.h"
  51 #include "content/common/host_shared_bitmap_manager.h"
  52 #include "content/common/input_messages.h"
  53 #include "content/common/view_messages.h"
  54 #include "content/public/browser/native_web_keyboard_event.h"
  55 #include "content/public/browser/notification_service.h"
  56 #include "content/public/browser/notification_types.h"
  57 #include "content/public/browser/render_widget_host_iterator.h"
  58 #include "content/public/browser/user_metrics.h"
  59 #include "content/public/common/content_constants.h"
  60 #include "content/public/common/content_switches.h"
  61 #include "content/public/common/result_codes.h"
  62 #include "skia/ext/image_operations.h"
  63 #include "skia/ext/platform_canvas.h"
  64 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  65 #include "ui/events/event.h"
  66 #include "ui/events/keycodes/keyboard_codes.h"
  67 #include "ui/gfx/size_conversions.h"
  68 #include "ui/gfx/skbitmap_operations.h"
  69 #include "ui/gfx/vector2d_conversions.h"
  70 #include "ui/snapshot/snapshot.h"
  71 #include "webkit/common/webpreferences.h"
  72
  73 #if defined(OS_WIN)
  74 #include "content/common/plugin_constants_win.h"
  75 #endif
  76
  77 using base::Time;
  78 using base::TimeDelta;
  79 using base::TimeTicks;
  80 using blink::WebGestureEvent;
  81 using blink::WebInputEvent;
  82 using blink::WebKeyboardEvent;
  83 using blink::WebMouseEvent;
  84 using blink::WebMouseWheelEvent;
  85 using blink::WebTextDirection;
  86
  87 namespace content {
  88 namespace {
  89
  90 bool g_check_for_pending_resize_ack = true;
  91
  92 // How long to (synchronously) wait for the renderer to respond with a
  93 // PaintRect message, when our backing-store is invalid, before giving up and
  94 // returning a null or incorrectly sized backing-store from GetBackingStore.
  95 // This timeout impacts the "choppiness" of our window resize perf.
  96 const int kPaintMsgTimeoutMS = 50;
  97
  98 typedef std::pair<int32, int32> RenderWidgetHostID;
  99 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
 100     RoutingIDWidgetMap;
 101 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 102     LAZY_INSTANCE_INITIALIZER;
 103
 104 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
 105     const cc::CompositorFrameMetadata metadata) {
 106   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 107
 108   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 109     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 110
 111   const float window_width_dip =
 112       std::ceil(metadata.page_scale_factor * metadata.viewport_size.width());
 113   const float content_width_css = metadata.root_layer_size.width();
 114   if (content_width_css <= window_width_dip)
 115     view_flags |= InputRouter::MOBILE_VIEWPORT;
 116
 117   return view_flags;
 118 }
 119
 120 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 121 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 122 // iteration (or NULL if there isn't any left).
 123 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 124  public:
 125   RenderWidgetHostIteratorImpl()
 126       : current_index_(0) {
 127   }
 128
 129   virtual ~RenderWidgetHostIteratorImpl() {
 130   }
 131
 132   void Add(RenderWidgetHost* host) {
 133     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 134                                         host->GetRoutingID()));
 135   }
 136
 137   // RenderWidgetHostIterator:
 138   virtual RenderWidgetHost* GetNextHost() OVERRIDE {
 139     RenderWidgetHost* host = NULL;
 140     while (current_index_ < hosts_.size() && !host) {
 141       RenderWidgetHostID id = hosts_[current_index_];
 142       host = RenderWidgetHost::FromID(id.first, id.second);
 143       ++current_index_;
 144     }
 145     return host;
 146   }
 147
 148  private:
 149   std::vector<RenderWidgetHostID> hosts_;
 150   size_t current_index_;
 151
 152   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 153 };
 154
 155 }  // namespace
 156
 157 ///////////////////////////////////////////////////////////////////////////////
 158 // RenderWidgetHostImpl
 159
 160 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 161                                            RenderProcessHost* process,
 162                                            int routing_id,
 163                                            bool hidden)
 164     : view_(NULL),
 165       renderer_initialized_(false),
 166       hung_renderer_delay_ms_(kHungRendererDelayMs),
 167       delegate_(delegate),
 168       process_(process),
 169       routing_id_(routing_id),
 170       surface_id_(0),
 171       is_loading_(false),
 172       is_hidden_(hidden),
 173       is_fullscreen_(false),
 174       repaint_ack_pending_(false),
 175       resize_ack_pending_(false),
 176       screen_info_out_of_date_(false),
 177       overdraw_bottom_height_(0.f),
 178       should_auto_resize_(false),
 179       waiting_for_screen_rects_ack_(false),
 180       accessibility_mode_(AccessibilityModeOff),
 181       needs_repainting_on_restore_(false),
 182       is_unresponsive_(false),
 183       in_flight_event_count_(0),
 184       in_get_backing_store_(false),
 185       ignore_input_events_(false),
 186       input_method_active_(false),
 187       text_direction_updated_(false),
 188       text_direction_(blink::WebTextDirectionLeftToRight),
 189       text_direction_canceled_(false),
 190       suppress_next_char_events_(false),
 191       pending_mouse_lock_request_(false),
 192       allow_privileged_mouse_lock_(false),
 193       has_touch_handler_(false),
 194       weak_factory_(this),
 195       last_input_number_(static_cast<int64>(GetProcess()->GetID()) << 32) {
 196   CHECK(delegate_);
 197   if (routing_id_ == MSG_ROUTING_NONE) {
 198     routing_id_ = process_->GetNextRoutingID();
 199     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 200         process_->GetID(),
 201         routing_id_);
 202   } else {
 203     // TODO(piman): This is a O(N) lookup, where we could forward the
 204     // information from the RenderWidgetHelper. The problem is that doing so
 205     // currently leaks outside of content all the way to chrome classes, and
 206     // would be a layering violation. Since we don't expect more than a few
 207     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 208     // problem, for example by tracking in the RenderWidgetHelper the routing id
 209     // (and surface id) that have been created, but whose RWH haven't yet.
 210     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 211         process_->GetID(),
 212         routing_id_);
 213     DCHECK(surface_id_);
 214   }
 215
 216   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 217       g_routing_id_widget_map.Get().insert(std::make_pair(
 218           RenderWidgetHostID(process->GetID(), routing_id_), this));
 219   CHECK(result.second) << "Inserting a duplicate item!";
 220   process_->AddRoute(routing_id_, this);
 221
 222   // If we're initially visible, tell the process host that we're alive.
 223   // Otherwise we'll notify the process host when we are first shown.
 224   if (!hidden)
 225     process_->WidgetRestored();
 226
 227   accessibility_mode_ =
 228       BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode();
 229
 230   input_router_.reset(new InputRouterImpl(
 231       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 232
 233   touch_emulator_.reset();
 234
 235   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 236       IsRenderView() ? RenderViewHost::From(this) : NULL);
 237   if (BrowserPluginGuest::IsGuest(rvh) ||
 238       !CommandLine::ForCurrentProcess()->HasSwitch(
 239           switches::kDisableHangMonitor)) {
 240     hang_monitor_timeout_.reset(new TimeoutMonitor(
 241         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 242                    weak_factory_.GetWeakPtr())));
 243   }
 244 }
 245
 246 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 247   SetView(NULL);
 248
 249   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 250   surface_id_ = 0;
 251
 252   process_->RemoveRoute(routing_id_);
 253   g_routing_id_widget_map.Get().erase(
 254       RenderWidgetHostID(process_->GetID(), routing_id_));
 255
 256   if (delegate_)
 257     delegate_->RenderWidgetDeleted(this);
 258 }
 259
 260 // static
 261 RenderWidgetHost* RenderWidgetHost::FromID(
 262     int32 process_id,
 263     int32 routing_id) {
 264   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 265 }
 266
 267 // static
 268 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 269     int32 process_id,
 270     int32 routing_id) {
 271   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 272   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 273   RoutingIDWidgetMap::iterator it = widgets->find(
 274       RenderWidgetHostID(process_id, routing_id));
 275   return it == widgets->end() ? NULL : it->second;
 276 }
 277
 278 // static
 279 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 280   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 281   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 282   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 283        it != widgets->end();
 284        ++it) {
 285     RenderWidgetHost* widget = it->second;
 286
 287     if (!widget->IsRenderView()) {
 288       hosts->Add(widget);
 289       continue;
 290     }
 291
 292     // Add only active RenderViewHosts.
 293     RenderViewHost* rvh = RenderViewHost::From(widget);
 294     if (RenderViewHostImpl::IsRVHStateActive(
 295             static_cast<RenderViewHostImpl*>(rvh)->rvh_state()))
 296       hosts->Add(widget);
 297   }
 298
 299   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 300 }
 301
 302 // static
 303 scoped_ptr<RenderWidgetHostIterator>
 304 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 305   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 306   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 307   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 308        it != widgets->end();
 309        ++it) {
 310     hosts->Add(it->second);
 311   }
 312
 313   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 314 }
 315
 316 // static
 317 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 318   return rwh->AsRenderWidgetHostImpl();
 319 }
 320
 321 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 322   view_ = view;
 323
 324   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 325       surface_id_, GetCompositingSurface());
 326
 327   synthetic_gesture_controller_.reset();
 328 }
 329
 330 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 331   return process_;
 332 }
 333
 334 int RenderWidgetHostImpl::GetRoutingID() const {
 335   return routing_id_;
 336 }
 337
 338 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 339   return view_;
 340 }
 341
 342 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 343   return this;
 344 }
 345
 346 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 347   if (view_)
 348     return view_->GetNativeViewId();
 349   return 0;
 350 }
 351
 352 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 353   if (view_)
 354     return view_->GetCompositingSurface();
 355   return gfx::GLSurfaceHandle();
 356 }
 357
 358 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 359   resize_ack_pending_ = false;
 360   if (repaint_ack_pending_) {
 361     TRACE_EVENT_ASYNC_END0(
 362         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 363   }
 364   repaint_ack_pending_ = false;
 365   last_requested_size_.SetSize(0, 0);
 366 }
 367
 368 void RenderWidgetHostImpl::SendScreenRects() {
 369   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 370     return;
 371
 372   if (is_hidden_) {
 373     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 374     // happens on Win & Mac, and when the view is shown it'll call this again.
 375     return;
 376   }
 377
 378   if (!view_)
 379     return;
 380
 381   last_view_screen_rect_ = view_->GetViewBounds();
 382   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 383   Send(new ViewMsg_UpdateScreenRects(
 384       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 385   if (delegate_)
 386     delegate_->DidSendScreenRects(this);
 387   waiting_for_screen_rects_ack_ = true;
 388 }
 389
 390 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 391   suppress_next_char_events_ = true;
 392 }
 393
 394 void RenderWidgetHostImpl::FlushInput() {
 395   input_router_->Flush();
 396   if (synthetic_gesture_controller_)
 397     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 398 }
 399
 400 void RenderWidgetHostImpl::SetNeedsFlush() {
 401   if (view_)
 402     view_->OnSetNeedsFlushInput();
 403 }
 404
 405 void RenderWidgetHostImpl::Init() {
 406   DCHECK(process_->HasConnection());
 407
 408   renderer_initialized_ = true;
 409
 410   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 411       surface_id_, GetCompositingSurface());
 412
 413   // Send the ack along with the information on placement.
 414   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 415   GetProcess()->ResumeRequestsForView(routing_id_);
 416
 417   WasResized();
 418 }
 419
 420 void RenderWidgetHostImpl::Shutdown() {
 421   RejectMouseLockOrUnlockIfNecessary();
 422
 423   if (process_->HasConnection()) {
 424     // Tell the renderer object to close.
 425     bool rv = Send(new ViewMsg_Close(routing_id_));
 426     DCHECK(rv);
 427   }
 428
 429   Destroy();
 430 }
 431
 432 bool RenderWidgetHostImpl::IsLoading() const {
 433   return is_loading_;
 434 }
 435
 436 bool RenderWidgetHostImpl::IsRenderView() const {
 437   return false;
 438 }
 439
 440 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 441   bool handled = true;
 442   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 443     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 444                         OnQueueSyntheticGesture)
 445     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 446     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderProcessGone, OnRenderProcessGone)
 447     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 448     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 449                         OnUpdateScreenRectsAck)
 450     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 451     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 452     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 453                                 OnSwapCompositorFrame(msg))
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 459     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTouchEventEmulationEnabled,
 460                         OnSetTouchEventEmulationEnabled)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
 462                         OnTextInputStateChanged)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCancelComposition,
 464                         OnImeCancelComposition)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 466     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 468                         OnShowDisambiguationPopup)
 469     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 471                         OnSelectionBoundsChanged)
 472 #if defined(OS_WIN)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 474                         OnWindowlessPluginDummyWindowCreated)
 475     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 476                         OnWindowlessPluginDummyWindowDestroyed)
 477 #endif
 478 #if defined(OS_MACOSX)
 479     IPC_MESSAGE_HANDLER(ViewHostMsg_CompositorSurfaceBuffersSwapped,
 480                         OnCompositorSurfaceBuffersSwapped)
 481 #endif
 482 #if defined(OS_MACOSX) || defined(USE_AURA)
 483     IPC_MESSAGE_HANDLER(ViewHostMsg_ImeCompositionRangeChanged,
 484                         OnImeCompositionRangeChanged)
 485 #endif
 486     IPC_MESSAGE_UNHANDLED(handled = false)
 487   IPC_END_MESSAGE_MAP()
 488
 489   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 490     return true;
 491
 492   if (!handled && view_ && view_->OnMessageReceived(msg))
 493     return true;
 494
 495   return handled;
 496 }
 497
 498 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 499   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 500     return input_router_->SendInput(make_scoped_ptr(msg));
 501
 502   return process_->Send(msg);
 503 }
 504
 505 void RenderWidgetHostImpl::WasHidden() {
 506   if (is_hidden_)
 507     return;
 508
 509   is_hidden_ = true;
 510
 511   // Don't bother reporting hung state when we aren't active.
 512   StopHangMonitorTimeout();
 513
 514   // If we have a renderer, then inform it that we are being hidden so it can
 515   // reduce its resource utilization.
 516   Send(new ViewMsg_WasHidden(routing_id_));
 517
 518   // Tell the RenderProcessHost we were hidden.
 519   process_->WidgetHidden();
 520
 521   bool is_visible = false;
 522   NotificationService::current()->Notify(
 523       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 524       Source<RenderWidgetHost>(this),
 525       Details<bool>(&is_visible));
 526 }
 527
 528 void RenderWidgetHostImpl::WasShown() {
 529   if (!is_hidden_)
 530     return;
 531   is_hidden_ = false;
 532
 533   SendScreenRects();
 534
 535   // Always repaint on restore.
 536   bool needs_repainting = true;
 537   needs_repainting_on_restore_ = false;
 538   Send(new ViewMsg_WasShown(routing_id_, needs_repainting));
 539
 540   process_->WidgetRestored();
 541
 542   bool is_visible = true;
 543   NotificationService::current()->Notify(
 544       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 545       Source<RenderWidgetHost>(this),
 546       Details<bool>(&is_visible));
 547
 548   // It's possible for our size to be out of sync with the renderer. The
 549   // following is one case that leads to this:
 550   // 1. WasResized -> Send ViewMsg_Resize to render
 551   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 552   // 3. WasHidden
 553   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 554   //    is hidden. Now renderer/browser out of sync with what they think size
 555   //    is.
 556   // By invoking WasResized the renderer is updated as necessary. WasResized
 557   // does nothing if the sizes are already in sync.
 558   //
 559   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 560   // could handle both the restore and resize at once. This isn't that big a
 561   // deal as RenderWidget::WasShown delays updating, so that the resize from
 562   // WasResized is usually processed before the renderer is painted.
 563   WasResized();
 564 }
 565
 566 void RenderWidgetHostImpl::WasResized() {
 567   // Skip if the |delegate_| has already been detached because
 568   // it's web contents is being deleted.
 569   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 570       !renderer_initialized_ || should_auto_resize_ || !delegate_) {
 571     return;
 572   }
 573
 574   gfx::Size new_size(view_->GetRequestedRendererSize());
 575
 576   gfx::Size old_physical_backing_size = physical_backing_size_;
 577   physical_backing_size_ = view_->GetPhysicalBackingSize();
 578   bool was_fullscreen = is_fullscreen_;
 579   is_fullscreen_ = IsFullscreen();
 580   float old_overdraw_bottom_height = overdraw_bottom_height_;
 581   overdraw_bottom_height_ = view_->GetOverdrawBottomHeight();
 582   gfx::Size old_visible_viewport_size = visible_viewport_size_;
 583   visible_viewport_size_ = view_->GetVisibleViewportSize();
 584
 585   bool size_changed = new_size != last_requested_size_;
 586   bool side_payload_changed =
 587       screen_info_out_of_date_ ||
 588       old_physical_backing_size != physical_backing_size_ ||
 589       was_fullscreen != is_fullscreen_ ||
 590       old_overdraw_bottom_height != overdraw_bottom_height_ ||
 591       old_visible_viewport_size != visible_viewport_size_;
 592
 593   if (!size_changed && !side_payload_changed)
 594     return;
 595
 596   if (!screen_info_) {
 597     screen_info_.reset(new blink::WebScreenInfo);
 598     GetWebScreenInfo(screen_info_.get());
 599   }
 600
 601   // We don't expect to receive an ACK when the requested size or the physical
 602   // backing size is empty, or when the main viewport size didn't change.
 603   if (!new_size.IsEmpty() && !physical_backing_size_.IsEmpty() && size_changed)
 604     resize_ack_pending_ = g_check_for_pending_resize_ack;
 605
 606   ViewMsg_Resize_Params params;
 607   params.screen_info = *screen_info_;
 608   params.new_size = new_size;
 609   params.physical_backing_size = physical_backing_size_;
 610   params.overdraw_bottom_height = overdraw_bottom_height_;
 611   params.visible_viewport_size = visible_viewport_size_;
 612   params.resizer_rect = GetRootWindowResizerRect();
 613   params.is_fullscreen = is_fullscreen_;
 614   if (!Send(new ViewMsg_Resize(routing_id_, params))) {
 615     resize_ack_pending_ = false;
 616   } else {
 617     last_requested_size_ = new_size;
 618   }
 619 }
 620
 621 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 622   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 623 }
 624
 625 void RenderWidgetHostImpl::GotFocus() {
 626   Focus();
 627 }
 628
 629 void RenderWidgetHostImpl::Focus() {
 630   Send(new InputMsg_SetFocus(routing_id_, true));
 631 }
 632
 633 void RenderWidgetHostImpl::Blur() {
 634   // If there is a pending mouse lock request, we don't want to reject it at
 635   // this point. The user can switch focus back to this view and approve the
 636   // request later.
 637   if (IsMouseLocked())
 638     view_->UnlockMouse();
 639
 640   if (touch_emulator_)
 641     touch_emulator_->CancelTouch();
 642
 643   Send(new InputMsg_SetFocus(routing_id_, false));
 644 }
 645
 646 void RenderWidgetHostImpl::LostCapture() {
 647   if (touch_emulator_)
 648     touch_emulator_->CancelTouch();
 649
 650   Send(new InputMsg_MouseCaptureLost(routing_id_));
 651 }
 652
 653 void RenderWidgetHostImpl::SetActive(bool active) {
 654   Send(new ViewMsg_SetActive(routing_id_, active));
 655 }
 656
 657 void RenderWidgetHostImpl::LostMouseLock() {
 658   Send(new ViewMsg_MouseLockLost(routing_id_));
 659 }
 660
 661 void RenderWidgetHostImpl::ViewDestroyed() {
 662   RejectMouseLockOrUnlockIfNecessary();
 663
 664   // TODO(evanm): tracking this may no longer be necessary;
 665   // eliminate this function if so.
 666   SetView(NULL);
 667 }
 668
 669 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 670   is_loading_ = is_loading;
 671   if (!view_)
 672     return;
 673   view_->SetIsLoading(is_loading);
 674 }
 675
 676 void RenderWidgetHostImpl::CopyFromBackingStore(
 677     const gfx::Rect& src_subrect,
 678     const gfx::Size& accelerated_dst_size,
 679     const base::Callback<void(bool, const SkBitmap&)>& callback,
 680     const SkBitmap::Config& bitmap_config) {
 681   if (view_) {
 682     TRACE_EVENT0("browser",
 683         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 684     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 685         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 686     view_->CopyFromCompositingSurface(
 687         accelerated_copy_rect, accelerated_dst_size, callback, bitmap_config);
 688     return;
 689   }
 690
 691   callback.Run(false, SkBitmap());
 692 }
 693
 694 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 695   if (view_)
 696     return view_->IsSurfaceAvailableForCopy();
 697   return false;
 698 }
 699
 700 #if defined(OS_ANDROID)
 701 void RenderWidgetHostImpl::LockBackingStore() {
 702   if (view_)
 703     view_->LockCompositingSurface();
 704 }
 705
 706 void RenderWidgetHostImpl::UnlockBackingStore() {
 707   if (view_)
 708     view_->UnlockCompositingSurface();
 709 }
 710 #endif
 711
 712 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 713   TRACE_EVENT0("browser",
 714       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 715
 716   if (!CanPauseForPendingResizeOrRepaints())
 717     return;
 718
 719   WaitForSurface();
 720 }
 721
 722 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 723   // Do not pause if the view is hidden.
 724   if (is_hidden())
 725     return false;
 726
 727   // Do not pause if there is not a paint or resize already coming.
 728   if (!repaint_ack_pending_ && !resize_ack_pending_)
 729     return false;
 730
 731   return true;
 732 }
 733
 734 void RenderWidgetHostImpl::WaitForSurface() {
 735   TRACE_EVENT0("browser", "RenderWidgetHostImpl::WaitForSurface");
 736
 737   if (!view_)
 738     return;
 739
 740   // The view_size will be current_size_ for auto-sized views and otherwise the
 741   // size of the view_. (For auto-sized views, current_size_ is updated during
 742   // UpdateRect messages.)
 743   gfx::Size view_size = current_size_;
 744   if (!should_auto_resize_) {
 745     // Get the desired size from the current view bounds.
 746     gfx::Rect view_rect = view_->GetViewBounds();
 747     if (view_rect.IsEmpty())
 748       return;
 749     view_size = view_rect.size();
 750   }
 751
 752   TRACE_EVENT2("renderer_host",
 753                "RenderWidgetHostImpl::WaitForBackingStore",
 754                "width",
 755                base::IntToString(view_size.width()),
 756                "height",
 757                base::IntToString(view_size.height()));
 758
 759   // We should not be asked to paint while we are hidden.  If we are hidden,
 760   // then it means that our consumer failed to call WasShown. If we're not
 761   // force creating the backing store, it's OK since we can feel free to give
 762   // out our cached one if we have it.
 763   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 764
 765   // We should never be called recursively; this can theoretically lead to
 766   // infinite recursion and almost certainly leads to lower performance.
 767   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 768   base::AutoReset<bool> auto_reset_in_get_backing_store(
 769       &in_get_backing_store_, true);
 770
 771   // We might have a surface that we can use!
 772   if (view_->HasAcceleratedSurface(view_size))
 773     return;
 774
 775   // We do not have a suitable backing store in the cache, so send out a
 776   // request to the renderer to paint the view if required.
 777   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 778     repaint_start_time_ = TimeTicks::Now();
 779     repaint_ack_pending_ = true;
 780     TRACE_EVENT_ASYNC_BEGIN0(
 781         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 782     Send(new ViewMsg_Repaint(routing_id_, view_size));
 783   }
 784
 785   TimeDelta max_delay = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 786   TimeTicks end_time = TimeTicks::Now() + max_delay;
 787   do {
 788     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForUpdate");
 789
 790     // When we have asked the RenderWidget to resize, and we are still waiting
 791     // on a response, block for a little while to see if we can't get a response
 792     // before returning the old (incorrectly sized) backing store.
 793     IPC::Message msg;
 794     if (process_->WaitForBackingStoreMsg(routing_id_, max_delay, &msg)) {
 795       OnMessageReceived(msg);
 796
 797       // For auto-resized views, current_size_ determines the view_size and it
 798       // may have changed during the handling of an UpdateRect message.
 799       if (should_auto_resize_)
 800         view_size = current_size_;
 801
 802       // Break now if we got a backing store or accelerated surface of the
 803       // correct size.
 804       if (view_->HasAcceleratedSurface(view_size))
 805         return;
 806     } else {
 807       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 808       break;
 809     }
 810
 811     // Loop if we still have time left and haven't gotten a properly sized
 812     // BackingStore yet. This is necessary to support the GPU path which
 813     // typically has multiple frames pipelined -- we may need to skip one or two
 814     // BackingStore messages to get to the latest.
 815     max_delay = end_time - TimeTicks::Now();
 816   } while (max_delay > TimeDelta::FromSeconds(0));
 817 }
 818
 819 bool RenderWidgetHostImpl::ScheduleComposite() {
 820   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 821       resize_ack_pending_) {
 822     return false;
 823   }
 824
 825   // Send out a request to the renderer to paint the view if required.
 826   repaint_start_time_ = TimeTicks::Now();
 827   repaint_ack_pending_ = true;
 828   TRACE_EVENT_ASYNC_BEGIN0(
 829       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 830   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 831   return true;
 832 }
 833
 834 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 835   if (hang_monitor_timeout_)
 836     hang_monitor_timeout_->Start(delay);
 837 }
 838
 839 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 840   if (hang_monitor_timeout_)
 841     hang_monitor_timeout_->Restart(
 842         base::TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
 843 }
 844
 845 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 846   if (hang_monitor_timeout_)
 847     hang_monitor_timeout_->Stop();
 848   RendererIsResponsive();
 849 }
 850
 851 void RenderWidgetHostImpl::EnableFullAccessibilityMode() {
 852   AddAccessibilityMode(AccessibilityModeComplete);
 853 }
 854
 855 bool RenderWidgetHostImpl::IsFullAccessibilityModeForTesting() {
 856   return accessibility_mode() == AccessibilityModeComplete;
 857 }
 858
 859 void RenderWidgetHostImpl::EnableTreeOnlyAccessibilityMode() {
 860   AddAccessibilityMode(AccessibilityModeTreeOnly);
 861 }
 862
 863 bool RenderWidgetHostImpl::IsTreeOnlyAccessibilityModeForTesting() {
 864   return accessibility_mode() == AccessibilityModeTreeOnly;
 865 }
 866
 867 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 868   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 869 }
 870
 871 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 872       const blink::WebMouseEvent& mouse_event,
 873       const ui::LatencyInfo& ui_latency) {
 874   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 875                "x", mouse_event.x, "y", mouse_event.y);
 876
 877   ui::LatencyInfo latency_info =
 878       CreateRWHLatencyInfoIfNotExist(&ui_latency, mouse_event.type);
 879
 880   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 881     if (mouse_event_callbacks_[i].Run(mouse_event))
 882       return;
 883   }
 884
 885   if (IgnoreInputEvents())
 886     return;
 887
 888   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 889     return;
 890
 891   input_router_->SendMouseEvent(MouseEventWithLatencyInfo(mouse_event,
 892                                                           latency_info));
 893 }
 894
 895 void RenderWidgetHostImpl::OnPointerEventActivate() {
 896 }
 897
 898 void RenderWidgetHostImpl::ForwardWheelEvent(
 899     const WebMouseWheelEvent& wheel_event) {
 900   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 901 }
 902
 903 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 904       const blink::WebMouseWheelEvent& wheel_event,
 905       const ui::LatencyInfo& ui_latency) {
 906   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 907
 908   ui::LatencyInfo latency_info =
 909       CreateRWHLatencyInfoIfNotExist(&ui_latency, wheel_event.type);
 910
 911   if (IgnoreInputEvents())
 912     return;
 913
 914   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 915     return;
 916
 917   input_router_->SendWheelEvent(MouseWheelEventWithLatencyInfo(wheel_event,
 918                                                                latency_info));
 919 }
 920
 921 void RenderWidgetHostImpl::ForwardGestureEvent(
 922     const blink::WebGestureEvent& gesture_event) {
 923   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 924 }
 925
 926 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 927     const blink::WebGestureEvent& gesture_event,
 928     const ui::LatencyInfo& ui_latency) {
 929   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 930   // Early out if necessary, prior to performing latency logic.
 931   if (IgnoreInputEvents())
 932     return;
 933
 934   if (delegate_->PreHandleGestureEvent(gesture_event))
 935     return;
 936
 937   ui::LatencyInfo latency_info =
 938       CreateRWHLatencyInfoIfNotExist(&ui_latency, gesture_event.type);
 939
 940   if (gesture_event.type == blink::WebInputEvent::GestureScrollUpdate) {
 941     latency_info.AddLatencyNumber(
 942         ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT,
 943         GetLatencyComponentId(),
 944         ++last_input_number_);
 945
 946     // Make a copy of the INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT with a
 947     // different name INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT.
 948     // So we can track the latency specifically for scroll update events.
 949     ui::LatencyInfo::LatencyComponent original_component;
 950     if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
 951                                  0,
 952                                  &original_component)) {
 953       latency_info.AddLatencyNumberWithTimestamp(
 954           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
 955           GetLatencyComponentId(),
 956           original_component.sequence_number,
 957           original_component.event_time,
 958           original_component.event_count);
 959     }
 960   }
 961
 962   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, latency_info);
 963   input_router_->SendGestureEvent(gesture_with_latency);
 964 }
 965
 966 void RenderWidgetHostImpl::ForwardTouchEvent(
 967       const blink::WebTouchEvent& touch_event) {
 968   ForwardTouchEventWithLatencyInfo(touch_event, ui::LatencyInfo());
 969 }
 970
 971 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 972       const blink::WebTouchEvent& touch_event,
 973       const ui::LatencyInfo& ui_latency) {
 974   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 975
 976   // Always forward TouchEvents for touch stream consistency. They will be
 977   // ignored if appropriate in FilterInputEvent().
 978
 979   ui::LatencyInfo latency_info =
 980       CreateRWHLatencyInfoIfNotExist(&ui_latency, touch_event.type);
 981   TouchEventWithLatencyInfo touch_with_latency(touch_event, latency_info);
 982   input_router_->SendTouchEvent(touch_with_latency);
 983 }
 984
 985 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 986     const NativeWebKeyboardEvent& key_event) {
 987   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 988   if (IgnoreInputEvents())
 989     return;
 990
 991   if (!process_->HasConnection())
 992     return;
 993
 994   // First, let keypress listeners take a shot at handling the event.  If a
 995   // listener handles the event, it should not be propagated to the renderer.
 996   if (KeyPressListenersHandleEvent(key_event)) {
 997     // Some keypresses that are accepted by the listener might have follow up
 998     // char events, which should be ignored.
 999     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1000       suppress_next_char_events_ = true;
1001     return;
1002   }
1003
1004   if (key_event.type == WebKeyboardEvent::Char &&
1005       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1006        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1007     OnUserGesture();
1008   }
1009
1010   // Double check the type to make sure caller hasn't sent us nonsense that
1011   // will mess up our key queue.
1012   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1013     return;
1014
1015   if (suppress_next_char_events_) {
1016     // If preceding RawKeyDown event was handled by the browser, then we need
1017     // suppress all Char events generated by it. Please note that, one
1018     // RawKeyDown event may generate multiple Char events, so we can't reset
1019     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1020     if (key_event.type == WebKeyboardEvent::Char)
1021       return;
1022     // We get a KeyUp or a RawKeyDown event.
1023     suppress_next_char_events_ = false;
1024   }
1025
1026   bool is_shortcut = false;
1027
1028   // Only pre-handle the key event if it's not handled by the input method.
1029   if (delegate_ && !key_event.skip_in_browser) {
1030     // We need to set |suppress_next_char_events_| to true if
1031     // PreHandleKeyboardEvent() returns true, but |this| may already be
1032     // destroyed at that time. So set |suppress_next_char_events_| true here,
1033     // then revert it afterwards when necessary.
1034     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1035       suppress_next_char_events_ = true;
1036
1037     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1038     // a hung/malicious renderer from interfering.
1039     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1040       return;
1041
1042     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1043       suppress_next_char_events_ = false;
1044   }
1045
1046   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1047     return;
1048
1049   input_router_->SendKeyboardEvent(
1050       key_event,
1051       CreateRWHLatencyInfoIfNotExist(NULL, key_event.type),
1052       is_shortcut);
1053 }
1054
1055 void RenderWidgetHostImpl::QueueSyntheticGesture(
1056     scoped_ptr<SyntheticGesture> synthetic_gesture,
1057     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1058   if (!synthetic_gesture_controller_ && view_) {
1059     synthetic_gesture_controller_.reset(
1060         new SyntheticGestureController(
1061             view_->CreateSyntheticGestureTarget().Pass()));
1062   }
1063   if (synthetic_gesture_controller_) {
1064     synthetic_gesture_controller_->QueueSyntheticGesture(
1065         synthetic_gesture.Pass(), on_complete);
1066   }
1067 }
1068
1069 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1070   if (!view_)
1071     return;
1072   view_->UpdateCursor(cursor);
1073 }
1074
1075 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1076   Send(new ViewMsg_ShowContextMenu(
1077       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1078 }
1079
1080 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1081   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1082 }
1083
1084 int64 RenderWidgetHostImpl::GetLatencyComponentId() {
1085   return GetRoutingID() | (static_cast<int64>(GetProcess()->GetID()) << 32);
1086 }
1087
1088 // static
1089 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1090   g_check_for_pending_resize_ack = false;
1091 }
1092
1093 ui::LatencyInfo RenderWidgetHostImpl::CreateRWHLatencyInfoIfNotExist(
1094     const ui::LatencyInfo* original, WebInputEvent::Type type) {
1095   ui::LatencyInfo info;
1096   if (original)
1097     info = *original;
1098   // In Aura, gesture event will already carry its original touch event's
1099   // INPUT_EVENT_LATENCY_RWH_COMPONENT.
1100   if (!info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1101                         GetLatencyComponentId(),
1102                         NULL)) {
1103     info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1104                           GetLatencyComponentId(),
1105                           ++last_input_number_);
1106     info.TraceEventType(WebInputEventTraits::GetName(type));
1107   }
1108   return info;
1109 }
1110
1111
1112 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1113     const KeyPressEventCallback& callback) {
1114   key_press_event_callbacks_.push_back(callback);
1115 }
1116
1117 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1118     const KeyPressEventCallback& callback) {
1119   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1120     if (key_press_event_callbacks_[i].Equals(callback)) {
1121       key_press_event_callbacks_.erase(
1122           key_press_event_callbacks_.begin() + i);
1123       return;
1124     }
1125   }
1126 }
1127
1128 void RenderWidgetHostImpl::AddMouseEventCallback(
1129     const MouseEventCallback& callback) {
1130   mouse_event_callbacks_.push_back(callback);
1131 }
1132
1133 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1134     const MouseEventCallback& callback) {
1135   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1136     if (mouse_event_callbacks_[i].Equals(callback)) {
1137       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1138       return;
1139     }
1140   }
1141 }
1142
1143 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1144   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1145   if (view_)
1146     view_->GetScreenInfo(result);
1147   else
1148     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1149   screen_info_out_of_date_ = false;
1150 }
1151
1152 const NativeWebKeyboardEvent*
1153     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1154   return input_router_->GetLastKeyboardEvent();
1155 }
1156
1157 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1158   // The resize message (which may not happen immediately) will carry with it
1159   // the screen info as well as the new size (if the screen has changed scale
1160   // factor).
1161   InvalidateScreenInfo();
1162   WasResized();
1163 }
1164
1165 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1166   screen_info_out_of_date_ = true;
1167   screen_info_.reset();
1168 }
1169
1170 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1171                                               size_t offset,
1172                                               const gfx::Range& range) {
1173   if (view_)
1174     view_->SelectionChanged(text, offset, range);
1175 }
1176
1177 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1178     const ViewHostMsg_SelectionBounds_Params& params) {
1179   if (view_) {
1180     view_->SelectionBoundsChanged(params);
1181   }
1182 }
1183
1184 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1185                                                  base::TimeDelta interval) {
1186   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1187 }
1188
1189 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1190                                           int exit_code) {
1191   // Clearing this flag causes us to re-create the renderer when recovering
1192   // from a crashed renderer.
1193   renderer_initialized_ = false;
1194
1195   waiting_for_screen_rects_ack_ = false;
1196
1197   // Must reset these to ensure that keyboard events work with a new renderer.
1198   suppress_next_char_events_ = false;
1199
1200   // Reset some fields in preparation for recovering from a crash.
1201   ResetSizeAndRepaintPendingFlags();
1202   current_size_.SetSize(0, 0);
1203   // After the renderer crashes, the view is destroyed and so the
1204   // RenderWidgetHost cannot track its visibility anymore. We assume such
1205   // RenderWidgetHost to be visible for the sake of internal accounting - be
1206   // careful about changing this - see http://crbug.com/401859.
1207   //
1208   // We need to at least make sure that the RenderProcessHost is notified about
1209   // the |is_hidden_| change, so that the renderer will have correct visibility
1210   // set when respawned.
1211   if (!is_hidden_) {
1212     process_->WidgetRestored();
1213     is_hidden_ = false;
1214   }
1215
1216   // Reset this to ensure the hung renderer mechanism is working properly.
1217   in_flight_event_count_ = 0;
1218
1219   if (view_) {
1220     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1221                                                gfx::GLSurfaceHandle());
1222     view_->RenderProcessGone(status, exit_code);
1223     view_ = NULL;  // The View should be deleted by RenderProcessGone.
1224   }
1225
1226   // Reconstruct the input router to ensure that it has fresh state for a new
1227   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1228   // event. (In particular, the above call to view_->RenderProcessGone will
1229   // destroy the aura window, which may dispatch a synthetic mouse move.)
1230   input_router_.reset(new InputRouterImpl(
1231       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1232
1233   synthetic_gesture_controller_.reset();
1234 }
1235
1236 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1237   text_direction_updated_ = true;
1238   text_direction_ = direction;
1239 }
1240
1241 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1242   if (text_direction_updated_)
1243     text_direction_canceled_ = true;
1244 }
1245
1246 void RenderWidgetHostImpl::NotifyTextDirection() {
1247   if (text_direction_updated_) {
1248     if (!text_direction_canceled_)
1249       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1250     text_direction_updated_ = false;
1251     text_direction_canceled_ = false;
1252   }
1253 }
1254
1255 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1256   input_method_active_ = activate;
1257   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1258 }
1259
1260 void RenderWidgetHostImpl::CandidateWindowShown() {
1261   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1262 }
1263
1264 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1265   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1266 }
1267
1268 void RenderWidgetHostImpl::CandidateWindowHidden() {
1269   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1270 }
1271
1272 void RenderWidgetHostImpl::ImeSetComposition(
1273     const base::string16& text,
1274     const std::vector<blink::WebCompositionUnderline>& underlines,
1275     int selection_start,
1276     int selection_end) {
1277   Send(new ViewMsg_ImeSetComposition(
1278             GetRoutingID(), text, underlines, selection_start, selection_end));
1279 }
1280
1281 void RenderWidgetHostImpl::ImeConfirmComposition(
1282     const base::string16& text,
1283     const gfx::Range& replacement_range,
1284     bool keep_selection) {
1285   Send(new ViewMsg_ImeConfirmComposition(
1286         GetRoutingID(), text, replacement_range, keep_selection));
1287 }
1288
1289 void RenderWidgetHostImpl::ImeCancelComposition() {
1290   Send(new ViewMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1291             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1292 }
1293
1294 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1295   return gfx::Rect();
1296 }
1297
1298 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1299                                               bool last_unlocked_by_target) {
1300   // Directly reject to lock the mouse. Subclass can override this method to
1301   // decide whether to allow mouse lock or not.
1302   GotResponseToLockMouseRequest(false);
1303 }
1304
1305 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1306   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1307   if (pending_mouse_lock_request_) {
1308     pending_mouse_lock_request_ = false;
1309     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1310   } else if (IsMouseLocked()) {
1311     view_->UnlockMouse();
1312   }
1313 }
1314
1315 bool RenderWidgetHostImpl::IsMouseLocked() const {
1316   return view_ ? view_->IsMouseLocked() : false;
1317 }
1318
1319 bool RenderWidgetHostImpl::IsFullscreen() const {
1320   return false;
1321 }
1322
1323 void RenderWidgetHostImpl::SetShouldAutoResize(bool enable) {
1324   should_auto_resize_ = enable;
1325 }
1326
1327 void RenderWidgetHostImpl::Destroy() {
1328   NotificationService::current()->Notify(
1329       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1330       Source<RenderWidgetHost>(this),
1331       NotificationService::NoDetails());
1332
1333   // Tell the view to die.
1334   // Note that in the process of the view shutting down, it can call a ton
1335   // of other messages on us.  So if you do any other deinitialization here,
1336   // do it after this call to view_->Destroy().
1337   if (view_)
1338     view_->Destroy();
1339
1340   delete this;
1341 }
1342
1343 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1344   NotificationService::current()->Notify(
1345       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1346       Source<RenderWidgetHost>(this),
1347       NotificationService::NoDetails());
1348   is_unresponsive_ = true;
1349   NotifyRendererUnresponsive();
1350 }
1351
1352 void RenderWidgetHostImpl::RendererIsResponsive() {
1353   if (is_unresponsive_) {
1354     is_unresponsive_ = false;
1355     NotifyRendererResponsive();
1356   }
1357 }
1358
1359 void RenderWidgetHostImpl::OnRenderViewReady() {
1360   SendScreenRects();
1361   WasResized();
1362 }
1363
1364 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1365   // TODO(evanm): This synchronously ends up calling "delete this".
1366   // Is that really what we want in response to this message?  I'm matching
1367   // previous behavior of the code here.
1368   Destroy();
1369 }
1370
1371 void RenderWidgetHostImpl::OnClose() {
1372   Shutdown();
1373 }
1374
1375 void RenderWidgetHostImpl::OnSetTooltipText(
1376     const base::string16& tooltip_text,
1377     WebTextDirection text_direction_hint) {
1378   // First, add directionality marks around tooltip text if necessary.
1379   // A naive solution would be to simply always wrap the text. However, on
1380   // windows, Unicode directional embedding characters can't be displayed on
1381   // systems that lack RTL fonts and are instead displayed as empty squares.
1382   //
1383   // To get around this we only wrap the string when we deem it necessary i.e.
1384   // when the locale direction is different than the tooltip direction hint.
1385   //
1386   // Currently, we use element's directionality as the tooltip direction hint.
1387   // An alternate solution would be to set the overall directionality based on
1388   // trying to detect the directionality from the tooltip text rather than the
1389   // element direction.  One could argue that would be a preferable solution
1390   // but we use the current approach to match Fx & IE's behavior.
1391   base::string16 wrapped_tooltip_text = tooltip_text;
1392   if (!tooltip_text.empty()) {
1393     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1394       // Force the tooltip to have LTR directionality.
1395       wrapped_tooltip_text =
1396           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1397     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1398                !base::i18n::IsRTL()) {
1399       // Force the tooltip to have RTL directionality.
1400       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1401     }
1402   }
1403   if (GetView())
1404     view_->SetTooltipText(wrapped_tooltip_text);
1405 }
1406
1407 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1408   waiting_for_screen_rects_ack_ = false;
1409   if (!view_)
1410     return;
1411
1412   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1413       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1414     return;
1415   }
1416
1417   SendScreenRects();
1418 }
1419
1420 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1421   if (view_) {
1422     view_->SetBounds(pos);
1423     Send(new ViewMsg_Move_ACK(routing_id_));
1424   }
1425 }
1426
1427 #if defined(OS_MACOSX)
1428 void RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwapped(
1429       const ViewHostMsg_CompositorSurfaceBuffersSwapped_Params& params) {
1430   // This trace event is used in
1431   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1432   TRACE_EVENT0("renderer_host",
1433                "RenderWidgetHostImpl::OnCompositorSurfaceBuffersSwapped");
1434   // This trace event is used in
1435   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1436   UNSHIPPED_TRACE_EVENT0("test_fps",
1437                          TRACE_DISABLED_BY_DEFAULT("OnSwapCompositorFrame"));
1438   if (!ui::LatencyInfo::Verify(params.latency_info,
1439                                "ViewHostMsg_CompositorSurfaceBuffersSwapped"))
1440     return;
1441   if (!view_) {
1442     AcceleratedSurfaceMsg_BufferPresented_Params ack_params;
1443     ack_params.sync_point = 0;
1444     RenderWidgetHostImpl::AcknowledgeBufferPresent(params.route_id,
1445                                                    params.gpu_process_host_id,
1446                                                    ack_params);
1447     return;
1448   }
1449   GpuHostMsg_AcceleratedSurfaceBuffersSwapped_Params gpu_params;
1450   gpu_params.surface_id = params.surface_id;
1451   gpu_params.surface_handle = params.surface_handle;
1452   gpu_params.route_id = params.route_id;
1453   gpu_params.size = params.size;
1454   gpu_params.scale_factor = params.scale_factor;
1455   gpu_params.latency_info = params.latency_info;
1456   for (size_t i = 0; i < gpu_params.latency_info.size(); i++)
1457     AddLatencyInfoComponentIds(&gpu_params.latency_info[i]);
1458   view_->AcceleratedSurfaceBuffersSwapped(gpu_params,
1459                                           params.gpu_process_host_id);
1460   view_->DidReceiveRendererFrame();
1461 }
1462 #endif  // OS_MACOSX
1463
1464 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1465     const IPC::Message& message) {
1466   // This trace event is used in
1467   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1468   UNSHIPPED_TRACE_EVENT0("test_fps",
1469                          TRACE_DISABLED_BY_DEFAULT("OnSwapCompositorFrame"));
1470   ViewHostMsg_SwapCompositorFrame::Param param;
1471   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1472     return false;
1473   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1474   uint32 output_surface_id = param.a;
1475   param.b.AssignTo(frame.get());
1476
1477   for (size_t i = 0; i < frame->metadata.latency_info.size(); i++)
1478     AddLatencyInfoComponentIds(&frame->metadata.latency_info[i]);
1479
1480   input_router_->OnViewUpdated(
1481       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1482
1483   if (view_) {
1484     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1485     view_->DidReceiveRendererFrame();
1486   } else {
1487     cc::CompositorFrameAck ack;
1488     if (frame->gl_frame_data) {
1489       ack.gl_frame_data = frame->gl_frame_data.Pass();
1490       ack.gl_frame_data->sync_point = 0;
1491     } else if (frame->delegated_frame_data) {
1492       cc::TransferableResource::ReturnResources(
1493           frame->delegated_frame_data->resource_list,
1494           &ack.resources);
1495     } else if (frame->software_frame_data) {
1496       ack.last_software_frame_id = frame->software_frame_data->id;
1497     }
1498     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1499                                process_->GetID(), ack);
1500   }
1501   return true;
1502 }
1503
1504 void RenderWidgetHostImpl::OnFlingingStopped() {
1505   if (view_)
1506     view_->DidStopFlinging();
1507 }
1508
1509 void RenderWidgetHostImpl::OnUpdateRect(
1510     const ViewHostMsg_UpdateRect_Params& params) {
1511   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1512   TimeTicks paint_start = TimeTicks::Now();
1513
1514   // Update our knowledge of the RenderWidget's size.
1515   current_size_ = params.view_size;
1516   // Update our knowledge of the RenderWidget's scroll offset.
1517   last_scroll_offset_ = params.scroll_offset;
1518
1519   bool is_resize_ack =
1520       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1521
1522   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1523   // that will end up reaching GetBackingStore.
1524   if (is_resize_ack) {
1525     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1526     resize_ack_pending_ = false;
1527   }
1528
1529   bool is_repaint_ack =
1530       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1531   if (is_repaint_ack) {
1532     DCHECK(repaint_ack_pending_);
1533     TRACE_EVENT_ASYNC_END0(
1534         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1535     repaint_ack_pending_ = false;
1536     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1537     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1538   }
1539
1540   DCHECK(!params.view_size.IsEmpty());
1541
1542   DidUpdateBackingStore(params, paint_start);
1543
1544   if (should_auto_resize_) {
1545     bool post_callback = new_auto_size_.IsEmpty();
1546     new_auto_size_ = params.view_size;
1547     if (post_callback) {
1548       base::MessageLoop::current()->PostTask(
1549           FROM_HERE,
1550           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1551                      weak_factory_.GetWeakPtr()));
1552     }
1553   }
1554
1555   // Log the time delta for processing a paint message. On platforms that don't
1556   // support asynchronous painting, this is equivalent to
1557   // MPArch.RWH_TotalPaintTime.
1558   TimeDelta delta = TimeTicks::Now() - paint_start;
1559   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1560 }
1561
1562 void RenderWidgetHostImpl::DidUpdateBackingStore(
1563     const ViewHostMsg_UpdateRect_Params& params,
1564     const TimeTicks& paint_start) {
1565   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1566   TimeTicks update_start = TimeTicks::Now();
1567
1568   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1569   // will not be re-issued, so must move them now, regardless of whether we
1570   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1571   // in the process could dispatch other window messages which could cause the
1572   // view to be destroyed.
1573   if (view_)
1574     view_->MovePluginWindows(params.plugin_window_moves);
1575
1576   NotificationService::current()->Notify(
1577       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1578       Source<RenderWidgetHost>(this),
1579       NotificationService::NoDetails());
1580
1581   // We don't need to update the view if the view is hidden. We must do this
1582   // early return after the ACK is sent, however, or the renderer will not send
1583   // us more data.
1584   if (is_hidden_)
1585     return;
1586
1587   // If we got a resize ack, then perhaps we have another resize to send?
1588   bool is_resize_ack =
1589       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1590   if (is_resize_ack)
1591     WasResized();
1592
1593   // Log the time delta for processing a paint message.
1594   TimeTicks now = TimeTicks::Now();
1595   TimeDelta delta = now - update_start;
1596   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1597 }
1598
1599 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1600     const SyntheticGesturePacket& gesture_packet) {
1601   // Only allow untrustworthy gestures if explicitly enabled.
1602   if (!CommandLine::ForCurrentProcess()->HasSwitch(
1603           cc::switches::kEnableGpuBenchmarking)) {
1604     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH7"));
1605     GetProcess()->ReceivedBadMessage();
1606     return;
1607   }
1608
1609   QueueSyntheticGesture(
1610         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1611         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1612                    weak_factory_.GetWeakPtr()));
1613 }
1614
1615 void RenderWidgetHostImpl::OnFocus() {
1616   // Only RenderViewHost can deal with that message.
1617   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH4"));
1618   GetProcess()->ReceivedBadMessage();
1619 }
1620
1621 void RenderWidgetHostImpl::OnBlur() {
1622   // Only RenderViewHost can deal with that message.
1623   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
1624   GetProcess()->ReceivedBadMessage();
1625 }
1626
1627 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1628   SetCursor(cursor);
1629 }
1630
1631 void RenderWidgetHostImpl::OnSetTouchEventEmulationEnabled(
1632     bool enabled, bool allow_pinch) {
1633   if (delegate_)
1634     delegate_->OnTouchEmulationEnabled(enabled);
1635
1636   if (enabled) {
1637     if (!touch_emulator_)
1638       touch_emulator_.reset(new TouchEmulator(this));
1639     touch_emulator_->Enable(allow_pinch);
1640   } else {
1641     if (touch_emulator_)
1642       touch_emulator_->Disable();
1643   }
1644 }
1645
1646 void RenderWidgetHostImpl::OnTextInputStateChanged(
1647     const ViewHostMsg_TextInputState_Params& params) {
1648   if (view_)
1649     view_->TextInputStateChanged(params);
1650 }
1651
1652 #if defined(OS_MACOSX) || defined(USE_AURA)
1653 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1654     const gfx::Range& range,
1655     const std::vector<gfx::Rect>& character_bounds) {
1656   if (view_)
1657     view_->ImeCompositionRangeChanged(range, character_bounds);
1658 }
1659 #endif
1660
1661 void RenderWidgetHostImpl::OnImeCancelComposition() {
1662   if (view_)
1663     view_->ImeCancelComposition();
1664 }
1665
1666 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1667                                        bool last_unlocked_by_target,
1668                                        bool privileged) {
1669
1670   if (pending_mouse_lock_request_) {
1671     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1672     return;
1673   } else if (IsMouseLocked()) {
1674     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1675     return;
1676   }
1677
1678   pending_mouse_lock_request_ = true;
1679   if (privileged && allow_privileged_mouse_lock_) {
1680     // Directly approve to lock the mouse.
1681     GotResponseToLockMouseRequest(true);
1682   } else {
1683     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1684   }
1685 }
1686
1687 void RenderWidgetHostImpl::OnUnlockMouse() {
1688   RejectMouseLockOrUnlockIfNecessary();
1689 }
1690
1691 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1692     const gfx::Rect& rect,
1693     const gfx::Size& size,
1694     const cc::SharedBitmapId& id) {
1695   DCHECK(!rect.IsEmpty());
1696   DCHECK(!size.IsEmpty());
1697
1698   scoped_ptr<cc::SharedBitmap> bitmap =
1699       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1700   if (!bitmap) {
1701     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH6"));
1702     GetProcess()->ReceivedBadMessage();
1703     return;
1704   }
1705
1706   DCHECK(bitmap->pixels());
1707
1708   SkBitmap zoomed_bitmap;
1709   zoomed_bitmap.setConfig(SkBitmap::kARGB_8888_Config,
1710       size.width(), size.height());
1711   zoomed_bitmap.setPixels(bitmap->pixels());
1712
1713 #if defined(OS_ANDROID)
1714   if (view_)
1715     view_->ShowDisambiguationPopup(rect, zoomed_bitmap);
1716 #else
1717   NOTIMPLEMENTED();
1718 #endif
1719
1720   zoomed_bitmap.setPixels(0);
1721   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1722 }
1723
1724 #if defined(OS_WIN)
1725 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1726     gfx::NativeViewId dummy_activation_window) {
1727   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1728
1729   // This may happen as a result of a race condition when the plugin is going
1730   // away.
1731   wchar_t window_title[MAX_PATH + 1] = {0};
1732   if (!IsWindow(hwnd) ||
1733       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1734       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1735     return;
1736   }
1737
1738 #if defined(USE_AURA)
1739   SetParent(hwnd,
1740             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1741 #else
1742   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1743 #endif
1744   dummy_windows_for_activation_.push_back(hwnd);
1745 }
1746
1747 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1748     gfx::NativeViewId dummy_activation_window) {
1749   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1750   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1751   for (; i != dummy_windows_for_activation_.end(); ++i) {
1752     if ((*i) == hwnd) {
1753       dummy_windows_for_activation_.erase(i);
1754       return;
1755     }
1756   }
1757   NOTREACHED() << "Unknown dummy window";
1758 }
1759 #endif
1760
1761 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1762   ignore_input_events_ = ignore_input_events;
1763 }
1764
1765 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1766     const NativeWebKeyboardEvent& event) {
1767   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1768     return false;
1769
1770   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1771     size_t original_size = key_press_event_callbacks_.size();
1772     if (key_press_event_callbacks_[i].Run(event))
1773       return true;
1774
1775     // Check whether the callback that just ran removed itself, in which case
1776     // the iterator needs to be decremented to properly account for the removal.
1777     size_t current_size = key_press_event_callbacks_.size();
1778     if (current_size != original_size) {
1779       DCHECK_EQ(original_size - 1, current_size);
1780       --i;
1781     }
1782   }
1783
1784   return false;
1785 }
1786
1787 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1788     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1789   // Don't ignore touch cancel events, since they may be sent while input
1790   // events are being ignored in order to keep the renderer from getting
1791   // confused about how many touches are active.
1792   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1793     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1794
1795   if (!process_->HasConnection())
1796     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1797
1798   if (event.type == WebInputEvent::MouseDown)
1799     OnUserGesture();
1800
1801   return view_ ? view_->FilterInputEvent(event)
1802                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1803 }
1804
1805 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1806   StartHangMonitorTimeout(
1807       TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
1808   increment_in_flight_event_count();
1809 }
1810
1811 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1812   DCHECK_GE(in_flight_event_count_, 0);
1813   // Cancel pending hung renderer checks since the renderer is responsive.
1814   if (decrement_in_flight_event_count() <= 0)
1815     StopHangMonitorTimeout();
1816 }
1817
1818 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1819   has_touch_handler_ = has_handlers;
1820 }
1821
1822 void RenderWidgetHostImpl::DidFlush() {
1823   if (synthetic_gesture_controller_)
1824     synthetic_gesture_controller_->OnDidFlushInput();
1825   if (view_)
1826     view_->OnDidFlushInput();
1827 }
1828
1829 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1830   if (view_)
1831     view_->DidOverscroll(params);
1832 }
1833
1834 void RenderWidgetHostImpl::OnKeyboardEventAck(
1835       const NativeWebKeyboardEvent& event,
1836       InputEventAckState ack_result) {
1837 #if defined(OS_MACOSX)
1838   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1839     return;
1840 #endif
1841
1842   // We only send unprocessed key event upwards if we are not hidden,
1843   // because the user has moved away from us and no longer expect any effect
1844   // of this key event.
1845   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1846   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1847     delegate_->HandleKeyboardEvent(event);
1848
1849     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1850     // (i.e.  in the case of Ctrl+W, where the call to
1851     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1852   }
1853 }
1854
1855 void RenderWidgetHostImpl::OnWheelEventAck(
1856     const MouseWheelEventWithLatencyInfo& wheel_event,
1857     InputEventAckState ack_result) {
1858   if (!wheel_event.latency.FindLatency(
1859           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1860     // MouseWheelEvent latency ends when it is acked but does not cause any
1861     // rendering scheduled.
1862     ui::LatencyInfo latency = wheel_event.latency;
1863     latency.AddLatencyNumber(
1864         ui::INPUT_EVENT_LATENCY_TERMINATED_MOUSE_COMPONENT, 0, 0);
1865   }
1866
1867   if (!is_hidden() && view_) {
1868     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1869         delegate_->HandleWheelEvent(wheel_event.event)) {
1870       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1871     }
1872     view_->WheelEventAck(wheel_event.event, ack_result);
1873   }
1874 }
1875
1876 void RenderWidgetHostImpl::OnGestureEventAck(
1877     const GestureEventWithLatencyInfo& event,
1878     InputEventAckState ack_result) {
1879   if (!event.latency.FindLatency(
1880           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1881     // GestureEvent latency ends when it is acked but does not cause any
1882     // rendering scheduled.
1883     ui::LatencyInfo latency = event.latency;
1884     latency.AddLatencyNumber(
1885         ui::INPUT_EVENT_LATENCY_TERMINATED_GESTURE_COMPONENT, 0 ,0);
1886   }
1887
1888   if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED) {
1889     if (delegate_->HandleGestureEvent(event.event))
1890       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1891   }
1892
1893   if (view_)
1894     view_->GestureEventAck(event.event, ack_result);
1895 }
1896
1897 void RenderWidgetHostImpl::OnTouchEventAck(
1898     const TouchEventWithLatencyInfo& event,
1899     InputEventAckState ack_result) {
1900   TouchEventWithLatencyInfo touch_event = event;
1901   touch_event.latency.AddLatencyNumber(
1902       ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, 0);
1903   // TouchEvent latency ends at ack if it didn't cause any rendering.
1904   if (!touch_event.latency.FindLatency(
1905           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1906     touch_event.latency.AddLatencyNumber(
1907         ui::INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT, 0, 0);
1908   }
1909   ComputeTouchLatency(touch_event.latency);
1910
1911   if (touch_emulator_ && touch_emulator_->HandleTouchEventAck(ack_result))
1912     return;
1913
1914   if (view_)
1915     view_->ProcessAckedTouchEvent(touch_event, ack_result);
1916 }
1917
1918 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1919   if (type == BAD_ACK_MESSAGE) {
1920     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
1921     process_->ReceivedBadMessage();
1922   } else if (type == UNEXPECTED_EVENT_TYPE) {
1923     suppress_next_char_events_ = false;
1924   }
1925 }
1926
1927 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1928     SyntheticGesture::Result result) {
1929   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1930 }
1931
1932 const gfx::Vector2d& RenderWidgetHostImpl::GetLastScrollOffset() const {
1933   return last_scroll_offset_;
1934 }
1935
1936 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1937   return ignore_input_events_ || process_->IgnoreInputEvents();
1938 }
1939
1940 bool RenderWidgetHostImpl::ShouldForwardTouchEvent() const {
1941   return input_router_->ShouldForwardTouchEvent();
1942 }
1943
1944 void RenderWidgetHostImpl::StartUserGesture() {
1945   OnUserGesture();
1946 }
1947
1948 void RenderWidgetHostImpl::Stop() {
1949   Send(new ViewMsg_Stop(GetRoutingID()));
1950 }
1951
1952 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1953   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1954 }
1955
1956 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1957     const std::vector<EditCommand>& commands) {
1958   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1959 }
1960
1961 void RenderWidgetHostImpl::AddAccessibilityMode(AccessibilityMode mode) {
1962   SetAccessibilityMode(
1963       content::AddAccessibilityModeTo(accessibility_mode_, mode));
1964 }
1965
1966 void RenderWidgetHostImpl::RemoveAccessibilityMode(AccessibilityMode mode) {
1967   SetAccessibilityMode(
1968       content::RemoveAccessibilityModeFrom(accessibility_mode_, mode));
1969 }
1970
1971 void RenderWidgetHostImpl::ResetAccessibilityMode() {
1972   SetAccessibilityMode(
1973       BrowserAccessibilityStateImpl::GetInstance()->accessibility_mode());
1974 }
1975
1976 void RenderWidgetHostImpl::SetAccessibilityMode(AccessibilityMode mode) {
1977   accessibility_mode_ = mode;
1978   Send(new ViewMsg_SetAccessibilityMode(GetRoutingID(), mode));
1979 }
1980
1981 void RenderWidgetHostImpl::AccessibilitySetFocus(int object_id) {
1982   Send(new AccessibilityMsg_SetFocus(GetRoutingID(), object_id));
1983   view_->OnAccessibilitySetFocus(object_id);
1984 }
1985
1986 void RenderWidgetHostImpl::AccessibilityDoDefaultAction(int object_id) {
1987   Send(new AccessibilityMsg_DoDefaultAction(GetRoutingID(), object_id));
1988 }
1989
1990 void RenderWidgetHostImpl::AccessibilityShowMenu(int object_id) {
1991   view_->AccessibilityShowMenu(object_id);
1992 }
1993
1994 void RenderWidgetHostImpl::AccessibilityScrollToMakeVisible(
1995     int acc_obj_id, gfx::Rect subfocus) {
1996   Send(new AccessibilityMsg_ScrollToMakeVisible(
1997       GetRoutingID(), acc_obj_id, subfocus));
1998 }
1999
2000 void RenderWidgetHostImpl::AccessibilityScrollToPoint(
2001     int acc_obj_id, gfx::Point point) {
2002   Send(new AccessibilityMsg_ScrollToPoint(
2003       GetRoutingID(), acc_obj_id, point));
2004 }
2005
2006 void RenderWidgetHostImpl::AccessibilitySetTextSelection(
2007     int object_id, int start_offset, int end_offset) {
2008   Send(new AccessibilityMsg_SetTextSelection(
2009       GetRoutingID(), object_id, start_offset, end_offset));
2010 }
2011
2012 bool RenderWidgetHostImpl::AccessibilityViewHasFocus() const {
2013   return view_->HasFocus();
2014 }
2015
2016 gfx::Rect RenderWidgetHostImpl::AccessibilityGetViewBounds() const {
2017   return view_->GetViewBounds();
2018 }
2019
2020 gfx::Point RenderWidgetHostImpl::AccessibilityOriginInScreen(
2021     const gfx::Rect& bounds) const {
2022   return view_->AccessibilityOriginInScreen(bounds);
2023 }
2024
2025 void RenderWidgetHostImpl::AccessibilityHitTest(const gfx::Point& point) {
2026   Send(new AccessibilityMsg_HitTest(GetRoutingID(), point));
2027 }
2028
2029 void RenderWidgetHostImpl::AccessibilityFatalError() {
2030   Send(new AccessibilityMsg_FatalError(GetRoutingID()));
2031   view_->SetBrowserAccessibilityManager(NULL);
2032 }
2033
2034 #if defined(OS_WIN)
2035 void RenderWidgetHostImpl::SetParentNativeViewAccessible(
2036     gfx::NativeViewAccessible accessible_parent) {
2037   if (view_)
2038     view_->SetParentNativeViewAccessible(accessible_parent);
2039 }
2040
2041 gfx::NativeViewAccessible
2042 RenderWidgetHostImpl::GetParentNativeViewAccessible() const {
2043   return delegate_->GetParentNativeViewAccessible();
2044 }
2045 #endif
2046
2047 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
2048                                               const std::string& value) {
2049   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
2050 }
2051
2052 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
2053     const gfx::Rect& rect) {
2054   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
2055 }
2056
2057 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
2058   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
2059 }
2060
2061 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
2062   if (!allowed) {
2063     RejectMouseLockOrUnlockIfNecessary();
2064     return false;
2065   } else {
2066     if (!pending_mouse_lock_request_) {
2067       // This is possible, e.g., the plugin sends us an unlock request before
2068       // the user allows to lock to mouse.
2069       return false;
2070     }
2071
2072     pending_mouse_lock_request_ = false;
2073     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
2074       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
2075       return false;
2076     } else {
2077       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
2078       return true;
2079     }
2080   }
2081 }
2082
2083 // static
2084 void RenderWidgetHostImpl::AcknowledgeBufferPresent(
2085     int32 route_id, int gpu_host_id,
2086     const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
2087   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
2088   if (ui_shim) {
2089     ui_shim->Send(new AcceleratedSurfaceMsg_BufferPresented(route_id,
2090                                                             params));
2091   }
2092 }
2093
2094 // static
2095 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
2096     int32 route_id,
2097     uint32 output_surface_id,
2098     int renderer_host_id,
2099     const cc::CompositorFrameAck& ack) {
2100   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2101   if (!host)
2102     return;
2103   host->Send(new ViewMsg_SwapCompositorFrameAck(
2104       route_id, output_surface_id, ack));
2105 }
2106
2107 // static
2108 void RenderWidgetHostImpl::SendReclaimCompositorResources(
2109     int32 route_id,
2110     uint32 output_surface_id,
2111     int renderer_host_id,
2112     const cc::CompositorFrameAck& ack) {
2113   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2114   if (!host)
2115     return;
2116   host->Send(
2117       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
2118 }
2119
2120 void RenderWidgetHostImpl::DelayedAutoResized() {
2121   gfx::Size new_size = new_auto_size_;
2122   // Clear the new_auto_size_ since the empty value is used as a flag to
2123   // indicate that no callback is in progress (i.e. without this line
2124   // DelayedAutoResized will not get called again).
2125   new_auto_size_.SetSize(0, 0);
2126   if (!should_auto_resize_)
2127     return;
2128
2129   OnRenderAutoResized(new_size);
2130 }
2131
2132 void RenderWidgetHostImpl::DetachDelegate() {
2133   delegate_ = NULL;
2134 }
2135
2136 void RenderWidgetHostImpl::ComputeTouchLatency(
2137     const ui::LatencyInfo& latency_info) {
2138   ui::LatencyInfo::LatencyComponent ui_component;
2139   ui::LatencyInfo::LatencyComponent rwh_component;
2140   ui::LatencyInfo::LatencyComponent acked_component;
2141
2142   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_UI_COMPONENT,
2143                                 0,
2144                                 &ui_component) ||
2145       !latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2146                                 GetLatencyComponentId(),
2147                                 &rwh_component))
2148     return;
2149
2150   DCHECK(ui_component.event_count == 1);
2151   DCHECK(rwh_component.event_count == 1);
2152
2153   base::TimeDelta ui_delta =
2154       rwh_component.event_time - ui_component.event_time;
2155   UMA_HISTOGRAM_CUSTOM_COUNTS(
2156       "Event.Latency.Browser.TouchUI",
2157       ui_delta.InMicroseconds(),
2158       1,
2159       20000,
2160       100);
2161
2162   if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT,
2163                                0,
2164                                &acked_component)) {
2165     DCHECK(acked_component.event_count == 1);
2166     base::TimeDelta acked_delta =
2167         acked_component.event_time - rwh_component.event_time;
2168     UMA_HISTOGRAM_CUSTOM_COUNTS(
2169         "Event.Latency.Browser.TouchAcked",
2170         acked_delta.InMicroseconds(),
2171         1,
2172         1000000,
2173         100);
2174   }
2175 }
2176
2177 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2178   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2179   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2180                                GetLatencyComponentId(),
2181                                &window_snapshot_component)) {
2182     int sequence_number = static_cast<int>(
2183         window_snapshot_component.sequence_number);
2184 #if defined(OS_MACOSX)
2185     // On Mac, when using CoreAnmation, there is a delay between when content
2186     // is drawn to the screen, and when the snapshot will actually pick up
2187     // that content. Insert a manual delay of 1/6th of a second (to simulate
2188     // 10 frames at 60 fps) before actually taking the snapshot.
2189     base::MessageLoop::current()->PostDelayedTask(
2190         FROM_HERE,
2191         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2192                    weak_factory_.GetWeakPtr(),
2193                    sequence_number),
2194         base::TimeDelta::FromSecondsD(1. / 6));
2195 #else
2196     WindowSnapshotReachedScreen(sequence_number);
2197 #endif
2198   }
2199
2200   ui::LatencyInfo::LatencyComponent rwh_component;
2201   ui::LatencyInfo::LatencyComponent swap_component;
2202   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2203                                 GetLatencyComponentId(),
2204                                 &rwh_component) ||
2205       !latency_info.FindLatency(
2206           ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT,
2207           0, &swap_component)) {
2208     return;
2209   }
2210
2211   ui::LatencyInfo::LatencyComponent original_component;
2212   if (latency_info.FindLatency(
2213           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
2214           GetLatencyComponentId(),
2215           &original_component)) {
2216     // This UMA metric tracks the time from when the original touch event is
2217     // created (averaged if there are multiple) to when the scroll gesture
2218     // results in final frame swap.
2219     base::TimeDelta delta =
2220         swap_component.event_time - original_component.event_time;
2221     for (size_t i = 0; i < original_component.event_count; i++) {
2222       UMA_HISTOGRAM_CUSTOM_COUNTS(
2223           "Event.Latency.TouchToScrollUpdateSwap",
2224           delta.InMicroseconds(),
2225           1,
2226           1000000,
2227           100);
2228     }
2229   }
2230 }
2231
2232 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2233   view_->DidReceiveRendererFrame();
2234 }
2235
2236 void RenderWidgetHostImpl::WindowSnapshotAsyncCallback(
2237     int routing_id,
2238     int snapshot_id,
2239     gfx::Size snapshot_size,
2240     scoped_refptr<base::RefCountedBytes> png_data) {
2241   if (!png_data) {
2242     std::vector<unsigned char> png_vector;
2243     Send(new ViewMsg_WindowSnapshotCompleted(
2244         routing_id, snapshot_id, gfx::Size(), png_vector));
2245     return;
2246   }
2247
2248   Send(new ViewMsg_WindowSnapshotCompleted(
2249       routing_id, snapshot_id, snapshot_size, png_data->data()));
2250 }
2251
2252 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2253   DCHECK(base::MessageLoopForUI::IsCurrent());
2254
2255   std::vector<unsigned char> png;
2256
2257   // This feature is behind the kEnableGpuBenchmarking command line switch
2258   // because it poses security concerns and should only be used for testing.
2259   const CommandLine& command_line = *CommandLine::ForCurrentProcess();
2260   if (!command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
2261     Send(new ViewMsg_WindowSnapshotCompleted(
2262         GetRoutingID(), snapshot_id, gfx::Size(), png));
2263     return;
2264   }
2265
2266   gfx::Rect view_bounds = GetView()->GetViewBounds();
2267   gfx::Rect snapshot_bounds(view_bounds.size());
2268   gfx::Size snapshot_size = snapshot_bounds.size();
2269
2270   if (ui::GrabViewSnapshot(
2271           GetView()->GetNativeView(), &png, snapshot_bounds)) {
2272     Send(new ViewMsg_WindowSnapshotCompleted(
2273         GetRoutingID(), snapshot_id, snapshot_size, png));
2274     return;
2275   }
2276
2277   ui::GrabViewSnapshotAsync(
2278       GetView()->GetNativeView(),
2279       snapshot_bounds,
2280       base::ThreadTaskRunnerHandle::Get(),
2281       base::Bind(&RenderWidgetHostImpl::WindowSnapshotAsyncCallback,
2282                  weak_factory_.GetWeakPtr(),
2283                  GetRoutingID(),
2284                  snapshot_id,
2285                  snapshot_size));
2286 }
2287
2288 // static
2289 void RenderWidgetHostImpl::CompositorFrameDrawn(
2290     const std::vector<ui::LatencyInfo>& latency_info) {
2291   for (size_t i = 0; i < latency_info.size(); i++) {
2292     std::set<RenderWidgetHostImpl*> rwhi_set;
2293     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2294              latency_info[i].latency_components.begin();
2295          b != latency_info[i].latency_components.end();
2296          ++b) {
2297       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2298           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT) {
2299         // Matches with GetLatencyComponentId
2300         int routing_id = b->first.second & 0xffffffff;
2301         int process_id = (b->first.second >> 32) & 0xffffffff;
2302         RenderWidgetHost* rwh =
2303             RenderWidgetHost::FromID(process_id, routing_id);
2304         if (!rwh) {
2305           continue;
2306         }
2307         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2308         if (rwhi_set.insert(rwhi).second)
2309           rwhi->FrameSwapped(latency_info[i]);
2310       }
2311     }
2312   }
2313 }
2314
2315 void RenderWidgetHostImpl::AddLatencyInfoComponentIds(
2316     ui::LatencyInfo* latency_info) {
2317   ui::LatencyInfo::LatencyMap new_components;
2318   ui::LatencyInfo::LatencyMap::iterator lc =
2319       latency_info->latency_components.begin();
2320   while (lc != latency_info->latency_components.end()) {
2321     ui::LatencyComponentType component_type = lc->first.first;
2322     if (component_type == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT) {
2323       // Generate a new component entry with the correct component ID
2324       ui::LatencyInfo::LatencyMap::key_type key =
2325           std::make_pair(component_type, GetLatencyComponentId());
2326       new_components[key] = lc->second;
2327
2328       // Remove the old entry
2329       latency_info->latency_components.erase(lc++);
2330     } else {
2331       ++lc;
2332     }
2333   }
2334
2335   // Add newly generated components into the latency info
2336   for (lc = new_components.begin(); lc != new_components.end(); ++lc) {
2337     latency_info->latency_components[lc->first] = lc->second;
2338   }
2339 }
2340
2341 SkBitmap::Config RenderWidgetHostImpl::PreferredReadbackFormat() {
2342   if (view_)
2343     return view_->PreferredReadbackFormat();
2344   return SkBitmap::kARGB_8888_Config;
2345 }
2346
2347 }  // namespace content