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/browser/renderer_host/render_widget_resize_helper.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 "content/public/common/web_preferences.h"
  63 #include "skia/ext/image_operations.h"
  64 #include "skia/ext/platform_canvas.h"
  65 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  66 #include "ui/events/event.h"
  67 #include "ui/events/keycodes/keyboard_codes.h"
  68 #include "ui/gfx/size_conversions.h"
  69 #include "ui/gfx/skbitmap_operations.h"
  70 #include "ui/gfx/vector2d_conversions.h"
  71 #include "ui/snapshot/snapshot.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 typedef std::pair<int32, int32> RenderWidgetHostID;
  93 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  94     RoutingIDWidgetMap;
  95 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
  96     LAZY_INSTANCE_INITIALIZER;
  97
  98 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
  99     const cc::CompositorFrameMetadata metadata) {
 100   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 101
 102   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 103     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 104
 105   const float window_width_dip = std::ceil(
 106       metadata.page_scale_factor * metadata.scrollable_viewport_size.width());
 107   const float content_width_css = metadata.root_layer_size.width();
 108   if (content_width_css <= window_width_dip)
 109     view_flags |= InputRouter::MOBILE_VIEWPORT;
 110
 111   return view_flags;
 112 }
 113
 114 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 115 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 116 // iteration (or NULL if there isn't any left).
 117 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 118  public:
 119   RenderWidgetHostIteratorImpl()
 120       : current_index_(0) {
 121   }
 122
 123   virtual ~RenderWidgetHostIteratorImpl() {
 124   }
 125
 126   void Add(RenderWidgetHost* host) {
 127     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 128                                         host->GetRoutingID()));
 129   }
 130
 131   // RenderWidgetHostIterator:
 132   virtual RenderWidgetHost* GetNextHost() OVERRIDE {
 133     RenderWidgetHost* host = NULL;
 134     while (current_index_ < hosts_.size() && !host) {
 135       RenderWidgetHostID id = hosts_[current_index_];
 136       host = RenderWidgetHost::FromID(id.first, id.second);
 137       ++current_index_;
 138     }
 139     return host;
 140   }
 141
 142  private:
 143   std::vector<RenderWidgetHostID> hosts_;
 144   size_t current_index_;
 145
 146   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 147 };
 148
 149 }  // namespace
 150
 151 ///////////////////////////////////////////////////////////////////////////////
 152 // RenderWidgetHostImpl
 153
 154 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 155                                            RenderProcessHost* process,
 156                                            int routing_id,
 157                                            bool hidden)
 158     : view_(NULL),
 159       renderer_initialized_(false),
 160       hung_renderer_delay_ms_(kHungRendererDelayMs),
 161       delegate_(delegate),
 162       process_(process),
 163       routing_id_(routing_id),
 164       surface_id_(0),
 165       is_loading_(false),
 166       is_hidden_(hidden),
 167       is_fullscreen_(false),
 168       repaint_ack_pending_(false),
 169       resize_ack_pending_(false),
 170       screen_info_out_of_date_(false),
 171       top_controls_layout_height_(0.f),
 172       should_auto_resize_(false),
 173       waiting_for_screen_rects_ack_(false),
 174       needs_repainting_on_restore_(false),
 175       is_unresponsive_(false),
 176       in_flight_event_count_(0),
 177       in_get_backing_store_(false),
 178       ignore_input_events_(false),
 179       input_method_active_(false),
 180       text_direction_updated_(false),
 181       text_direction_(blink::WebTextDirectionLeftToRight),
 182       text_direction_canceled_(false),
 183       suppress_next_char_events_(false),
 184       pending_mouse_lock_request_(false),
 185       allow_privileged_mouse_lock_(false),
 186       has_touch_handler_(false),
 187       weak_factory_(this),
 188       last_input_number_(static_cast<int64>(GetProcess()->GetID()) << 32),
 189       next_browser_snapshot_id_(1) {
 190   CHECK(delegate_);
 191   if (routing_id_ == MSG_ROUTING_NONE) {
 192     routing_id_ = process_->GetNextRoutingID();
 193     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 194         process_->GetID(),
 195         routing_id_);
 196   } else {
 197     // TODO(piman): This is a O(N) lookup, where we could forward the
 198     // information from the RenderWidgetHelper. The problem is that doing so
 199     // currently leaks outside of content all the way to chrome classes, and
 200     // would be a layering violation. Since we don't expect more than a few
 201     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 202     // problem, for example by tracking in the RenderWidgetHelper the routing id
 203     // (and surface id) that have been created, but whose RWH haven't yet.
 204     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 205         process_->GetID(),
 206         routing_id_);
 207     DCHECK(surface_id_);
 208   }
 209
 210   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 211       g_routing_id_widget_map.Get().insert(std::make_pair(
 212           RenderWidgetHostID(process->GetID(), routing_id_), this));
 213   CHECK(result.second) << "Inserting a duplicate item!";
 214   process_->AddRoute(routing_id_, this);
 215
 216   // If we're initially visible, tell the process host that we're alive.
 217   // Otherwise we'll notify the process host when we are first shown.
 218   if (!hidden)
 219     process_->WidgetRestored();
 220
 221   input_router_.reset(new InputRouterImpl(
 222       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 223
 224   touch_emulator_.reset();
 225
 226   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 227       IsRenderView() ? RenderViewHost::From(this) : NULL);
 228   if (BrowserPluginGuest::IsGuest(rvh) ||
 229       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 230           switches::kDisableHangMonitor)) {
 231     hang_monitor_timeout_.reset(new TimeoutMonitor(
 232         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 233                    weak_factory_.GetWeakPtr())));
 234   }
 235 }
 236
 237 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 238   if (view_weak_)
 239     view_weak_->RenderWidgetHostGone();
 240   SetView(NULL);
 241
 242   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 243   surface_id_ = 0;
 244
 245   process_->RemoveRoute(routing_id_);
 246   g_routing_id_widget_map.Get().erase(
 247       RenderWidgetHostID(process_->GetID(), routing_id_));
 248
 249   if (delegate_)
 250     delegate_->RenderWidgetDeleted(this);
 251 }
 252
 253 // static
 254 RenderWidgetHost* RenderWidgetHost::FromID(
 255     int32 process_id,
 256     int32 routing_id) {
 257   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 258 }
 259
 260 // static
 261 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 262     int32 process_id,
 263     int32 routing_id) {
 264   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 265   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 266   RoutingIDWidgetMap::iterator it = widgets->find(
 267       RenderWidgetHostID(process_id, routing_id));
 268   return it == widgets->end() ? NULL : it->second;
 269 }
 270
 271 // static
 272 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 273   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 274   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 275   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 276        it != widgets->end();
 277        ++it) {
 278     RenderWidgetHost* widget = it->second;
 279
 280     if (!widget->IsRenderView()) {
 281       hosts->Add(widget);
 282       continue;
 283     }
 284
 285     // Add only active RenderViewHosts.
 286     RenderViewHost* rvh = RenderViewHost::From(widget);
 287     if (RenderViewHostImpl::IsRVHStateActive(
 288             static_cast<RenderViewHostImpl*>(rvh)->rvh_state()))
 289       hosts->Add(widget);
 290   }
 291
 292   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 293 }
 294
 295 // static
 296 scoped_ptr<RenderWidgetHostIterator>
 297 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 298   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 299   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 300   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 301        it != widgets->end();
 302        ++it) {
 303     hosts->Add(it->second);
 304   }
 305
 306   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 307 }
 308
 309 // static
 310 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 311   return rwh->AsRenderWidgetHostImpl();
 312 }
 313
 314 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 315   if (view)
 316     view_weak_ = view->GetWeakPtr();
 317   else
 318     view_weak_.reset();
 319   view_ = view;
 320
 321   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 322       surface_id_, GetCompositingSurface());
 323
 324   synthetic_gesture_controller_.reset();
 325 }
 326
 327 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 328   return process_;
 329 }
 330
 331 int RenderWidgetHostImpl::GetRoutingID() const {
 332   return routing_id_;
 333 }
 334
 335 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 336   return view_;
 337 }
 338
 339 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 340   return this;
 341 }
 342
 343 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 344   if (view_)
 345     return view_->GetNativeViewId();
 346   return 0;
 347 }
 348
 349 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 350   if (view_)
 351     return view_->GetCompositingSurface();
 352   return gfx::GLSurfaceHandle();
 353 }
 354
 355 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 356   resize_ack_pending_ = false;
 357   if (repaint_ack_pending_) {
 358     TRACE_EVENT_ASYNC_END0(
 359         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 360   }
 361   repaint_ack_pending_ = false;
 362   last_requested_size_.SetSize(0, 0);
 363 }
 364
 365 void RenderWidgetHostImpl::SendScreenRects() {
 366   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 367     return;
 368
 369   if (is_hidden_) {
 370     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 371     // happens on Win & Mac, and when the view is shown it'll call this again.
 372     return;
 373   }
 374
 375   if (!view_)
 376     return;
 377
 378   last_view_screen_rect_ = view_->GetViewBounds();
 379   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 380   Send(new ViewMsg_UpdateScreenRects(
 381       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 382   if (delegate_)
 383     delegate_->DidSendScreenRects(this);
 384   waiting_for_screen_rects_ack_ = true;
 385 }
 386
 387 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 388   suppress_next_char_events_ = true;
 389 }
 390
 391 void RenderWidgetHostImpl::FlushInput() {
 392   input_router_->Flush();
 393   if (synthetic_gesture_controller_)
 394     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 395 }
 396
 397 void RenderWidgetHostImpl::SetNeedsFlush() {
 398   if (view_)
 399     view_->OnSetNeedsFlushInput();
 400 }
 401
 402 void RenderWidgetHostImpl::Init() {
 403   DCHECK(process_->HasConnection());
 404
 405   renderer_initialized_ = true;
 406
 407   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 408       surface_id_, GetCompositingSurface());
 409
 410   // Send the ack along with the information on placement.
 411   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 412   GetProcess()->ResumeRequestsForView(routing_id_);
 413
 414   WasResized();
 415 }
 416
 417 void RenderWidgetHostImpl::Shutdown() {
 418   RejectMouseLockOrUnlockIfNecessary();
 419
 420   if (process_->HasConnection()) {
 421     // Tell the renderer object to close.
 422     bool rv = Send(new ViewMsg_Close(routing_id_));
 423     DCHECK(rv);
 424   }
 425
 426   Destroy();
 427 }
 428
 429 bool RenderWidgetHostImpl::IsLoading() const {
 430   return is_loading_;
 431 }
 432
 433 bool RenderWidgetHostImpl::IsRenderView() const {
 434   return false;
 435 }
 436
 437 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 438   bool handled = true;
 439   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 440     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 441                         OnQueueSyntheticGesture)
 442     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 443                         OnImeCancelComposition)
 444     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 445     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderProcessGone, OnRenderProcessGone)
 446     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 447     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 448                         OnUpdateScreenRectsAck)
 449     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 450     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 451     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 452                                 OnSwapCompositorFrame(msg))
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
 459                         OnTextInputStateChanged)
 460     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 462     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 463                         OnShowDisambiguationPopup)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 466                         OnSelectionBoundsChanged)
 467 #if defined(OS_WIN)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 469                         OnWindowlessPluginDummyWindowCreated)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 471                         OnWindowlessPluginDummyWindowDestroyed)
 472 #endif
 473 #if defined(OS_MACOSX) || defined(USE_AURA)
 474     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 475                         OnImeCompositionRangeChanged)
 476 #endif
 477     IPC_MESSAGE_UNHANDLED(handled = false)
 478   IPC_END_MESSAGE_MAP()
 479
 480   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 481     return true;
 482
 483   if (!handled && view_ && view_->OnMessageReceived(msg))
 484     return true;
 485
 486   return handled;
 487 }
 488
 489 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 490   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 491     return input_router_->SendInput(make_scoped_ptr(msg));
 492
 493   return process_->Send(msg);
 494 }
 495
 496 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 497   is_loading_ = is_loading;
 498   if (!view_)
 499     return;
 500   view_->SetIsLoading(is_loading);
 501 }
 502
 503 void RenderWidgetHostImpl::WasHidden() {
 504   if (is_hidden_)
 505     return;
 506
 507   is_hidden_ = true;
 508
 509   // Don't bother reporting hung state when we aren't active.
 510   StopHangMonitorTimeout();
 511
 512   // If we have a renderer, then inform it that we are being hidden so it can
 513   // reduce its resource utilization.
 514   Send(new ViewMsg_WasHidden(routing_id_));
 515
 516   // Tell the RenderProcessHost we were hidden.
 517   process_->WidgetHidden();
 518
 519   bool is_visible = false;
 520   NotificationService::current()->Notify(
 521       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 522       Source<RenderWidgetHost>(this),
 523       Details<bool>(&is_visible));
 524 }
 525
 526 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 527   if (!is_hidden_)
 528     return;
 529   is_hidden_ = false;
 530
 531   SendScreenRects();
 532
 533   // Always repaint on restore.
 534   bool needs_repainting = true;
 535   needs_repainting_on_restore_ = false;
 536   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 537
 538   process_->WidgetRestored();
 539
 540   bool is_visible = true;
 541   NotificationService::current()->Notify(
 542       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 543       Source<RenderWidgetHost>(this),
 544       Details<bool>(&is_visible));
 545
 546   // It's possible for our size to be out of sync with the renderer. The
 547   // following is one case that leads to this:
 548   // 1. WasResized -> Send ViewMsg_Resize to render
 549   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 550   // 3. WasHidden
 551   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 552   //    is hidden. Now renderer/browser out of sync with what they think size
 553   //    is.
 554   // By invoking WasResized the renderer is updated as necessary. WasResized
 555   // does nothing if the sizes are already in sync.
 556   //
 557   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 558   // could handle both the restore and resize at once. This isn't that big a
 559   // deal as RenderWidget::WasShown delays updating, so that the resize from
 560   // WasResized is usually processed before the renderer is painted.
 561   WasResized();
 562 }
 563
 564 void RenderWidgetHostImpl::WasResized() {
 565   // Skip if the |delegate_| has already been detached because
 566   // it's web contents is being deleted.
 567   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 568       !renderer_initialized_ || should_auto_resize_ || !delegate_) {
 569     return;
 570   }
 571
 572   gfx::Size new_size(view_->GetRequestedRendererSize());
 573
 574   gfx::Size old_physical_backing_size = physical_backing_size_;
 575   physical_backing_size_ = view_->GetPhysicalBackingSize();
 576   bool was_fullscreen = is_fullscreen_;
 577   is_fullscreen_ = IsFullscreen();
 578   float old_top_controls_layout_height =
 579       top_controls_layout_height_;
 580   top_controls_layout_height_ =
 581       view_->GetTopControlsLayoutHeight();
 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_top_controls_layout_height !=
 591           top_controls_layout_height_ ||
 592       old_visible_viewport_size != visible_viewport_size_;
 593
 594   if (!size_changed && !side_payload_changed)
 595     return;
 596
 597   if (!screen_info_) {
 598     screen_info_.reset(new blink::WebScreenInfo);
 599     GetWebScreenInfo(screen_info_.get());
 600   }
 601
 602   // We don't expect to receive an ACK when the requested size or the physical
 603   // backing size is empty, or when the main viewport size didn't change.
 604   if (!new_size.IsEmpty() && !physical_backing_size_.IsEmpty() && size_changed)
 605     resize_ack_pending_ = g_check_for_pending_resize_ack;
 606
 607   ViewMsg_Resize_Params params;
 608   params.screen_info = *screen_info_;
 609   params.new_size = new_size;
 610   params.physical_backing_size = physical_backing_size_;
 611   params.top_controls_layout_height = top_controls_layout_height_;
 612   params.visible_viewport_size = visible_viewport_size_;
 613   params.resizer_rect = GetRootWindowResizerRect();
 614   params.is_fullscreen = is_fullscreen_;
 615   if (!Send(new ViewMsg_Resize(routing_id_, params))) {
 616     resize_ack_pending_ = false;
 617   } else {
 618     last_requested_size_ = new_size;
 619   }
 620 }
 621
 622 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 623   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 624 }
 625
 626 void RenderWidgetHostImpl::GotFocus() {
 627   Focus();
 628 }
 629
 630 void RenderWidgetHostImpl::Focus() {
 631   Send(new InputMsg_SetFocus(routing_id_, true));
 632 }
 633
 634 void RenderWidgetHostImpl::Blur() {
 635   // If there is a pending mouse lock request, we don't want to reject it at
 636   // this point. The user can switch focus back to this view and approve the
 637   // request later.
 638   if (IsMouseLocked())
 639     view_->UnlockMouse();
 640
 641   if (touch_emulator_)
 642     touch_emulator_->CancelTouch();
 643
 644   Send(new InputMsg_SetFocus(routing_id_, false));
 645 }
 646
 647 void RenderWidgetHostImpl::LostCapture() {
 648   if (touch_emulator_)
 649     touch_emulator_->CancelTouch();
 650
 651   Send(new InputMsg_MouseCaptureLost(routing_id_));
 652 }
 653
 654 void RenderWidgetHostImpl::SetActive(bool active) {
 655   Send(new ViewMsg_SetActive(routing_id_, active));
 656 }
 657
 658 void RenderWidgetHostImpl::LostMouseLock() {
 659   Send(new ViewMsg_MouseLockLost(routing_id_));
 660 }
 661
 662 void RenderWidgetHostImpl::ViewDestroyed() {
 663   RejectMouseLockOrUnlockIfNecessary();
 664
 665   // TODO(evanm): tracking this may no longer be necessary;
 666   // eliminate this function if so.
 667   SetView(NULL);
 668 }
 669
 670 void RenderWidgetHostImpl::CopyFromBackingStore(
 671     const gfx::Rect& src_subrect,
 672     const gfx::Size& accelerated_dst_size,
 673     const base::Callback<void(bool, const SkBitmap&)>& callback,
 674     const SkColorType color_type) {
 675   if (view_) {
 676     TRACE_EVENT0("browser",
 677         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 678     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 679         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 680     view_->CopyFromCompositingSurface(
 681         accelerated_copy_rect, accelerated_dst_size, callback, color_type);
 682     return;
 683   }
 684
 685   callback.Run(false, SkBitmap());
 686 }
 687
 688 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 689   if (view_)
 690     return view_->IsSurfaceAvailableForCopy();
 691   return false;
 692 }
 693
 694 #if defined(OS_ANDROID)
 695 void RenderWidgetHostImpl::LockBackingStore() {
 696   if (view_)
 697     view_->LockCompositingSurface();
 698 }
 699
 700 void RenderWidgetHostImpl::UnlockBackingStore() {
 701   if (view_)
 702     view_->UnlockCompositingSurface();
 703 }
 704 #endif
 705
 706 #if defined(OS_MACOSX)
 707 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 708   TRACE_EVENT0("browser",
 709       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 710
 711   if (!CanPauseForPendingResizeOrRepaints())
 712     return;
 713
 714   WaitForSurface();
 715 }
 716
 717 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 718   // Do not pause if the view is hidden.
 719   if (is_hidden())
 720     return false;
 721
 722   // Do not pause if there is not a paint or resize already coming.
 723   if (!repaint_ack_pending_ && !resize_ack_pending_)
 724     return false;
 725
 726   return true;
 727 }
 728
 729 void RenderWidgetHostImpl::WaitForSurface() {
 730   TRACE_EVENT0("browser", "RenderWidgetHostImpl::WaitForSurface");
 731
 732   // How long to (synchronously) wait for the renderer to respond with a
 733   // new frame when our current frame doesn't exist or is the wrong size.
 734   // This timeout impacts the "choppiness" of our window resize.
 735   const int kPaintMsgTimeoutMS = 50;
 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 (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(max_delay)) {
 795
 796       // For auto-resized views, current_size_ determines the view_size and it
 797       // may have changed during the handling of an UpdateRect message.
 798       if (should_auto_resize_)
 799         view_size = current_size_;
 800
 801       // Break now if we got a backing store or accelerated surface of the
 802       // correct size.
 803       if (view_->HasAcceleratedSurface(view_size))
 804         return;
 805     } else {
 806       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 807       break;
 808     }
 809
 810     // Loop if we still have time left and haven't gotten a properly sized
 811     // BackingStore yet. This is necessary to support the GPU path which
 812     // typically has multiple frames pipelined -- we may need to skip one or two
 813     // BackingStore messages to get to the latest.
 814     max_delay = end_time - TimeTicks::Now();
 815   } while (max_delay > TimeDelta::FromSeconds(0));
 816 }
 817 #endif
 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::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 852   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 853 }
 854
 855 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 856       const blink::WebMouseEvent& mouse_event,
 857       const ui::LatencyInfo& ui_latency) {
 858   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 859                "x", mouse_event.x, "y", mouse_event.y);
 860
 861   ui::LatencyInfo latency_info =
 862       CreateRWHLatencyInfoIfNotExist(&ui_latency, mouse_event.type);
 863
 864   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 865     if (mouse_event_callbacks_[i].Run(mouse_event))
 866       return;
 867   }
 868
 869   if (IgnoreInputEvents())
 870     return;
 871
 872   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 873     return;
 874
 875   input_router_->SendMouseEvent(MouseEventWithLatencyInfo(mouse_event,
 876                                                           latency_info));
 877 }
 878
 879 void RenderWidgetHostImpl::OnPointerEventActivate() {
 880 }
 881
 882 void RenderWidgetHostImpl::ForwardWheelEvent(
 883     const WebMouseWheelEvent& wheel_event) {
 884   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 885 }
 886
 887 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 888       const blink::WebMouseWheelEvent& wheel_event,
 889       const ui::LatencyInfo& ui_latency) {
 890   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 891
 892   ui::LatencyInfo latency_info =
 893       CreateRWHLatencyInfoIfNotExist(&ui_latency, wheel_event.type);
 894
 895   if (IgnoreInputEvents())
 896     return;
 897
 898   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 899     return;
 900
 901   input_router_->SendWheelEvent(MouseWheelEventWithLatencyInfo(wheel_event,
 902                                                                latency_info));
 903 }
 904
 905 void RenderWidgetHostImpl::ForwardGestureEvent(
 906     const blink::WebGestureEvent& gesture_event) {
 907   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 908 }
 909
 910 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 911     const blink::WebGestureEvent& gesture_event,
 912     const ui::LatencyInfo& ui_latency) {
 913   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 914   // Early out if necessary, prior to performing latency logic.
 915   if (IgnoreInputEvents())
 916     return;
 917
 918   if (delegate_->PreHandleGestureEvent(gesture_event))
 919     return;
 920
 921   ui::LatencyInfo latency_info =
 922       CreateRWHLatencyInfoIfNotExist(&ui_latency, gesture_event.type);
 923
 924   if (gesture_event.type == blink::WebInputEvent::GestureScrollUpdate) {
 925     latency_info.AddLatencyNumber(
 926         ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_RWH_COMPONENT,
 927         GetLatencyComponentId(),
 928         ++last_input_number_);
 929
 930     // Make a copy of the INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT with a
 931     // different name INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT.
 932     // So we can track the latency specifically for scroll update events.
 933     ui::LatencyInfo::LatencyComponent original_component;
 934     if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ORIGINAL_COMPONENT,
 935                                  0,
 936                                  &original_component)) {
 937       latency_info.AddLatencyNumberWithTimestamp(
 938           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
 939           GetLatencyComponentId(),
 940           original_component.sequence_number,
 941           original_component.event_time,
 942           original_component.event_count);
 943     }
 944   }
 945
 946   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, latency_info);
 947   input_router_->SendGestureEvent(gesture_with_latency);
 948 }
 949
 950 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 951       const blink::WebTouchEvent& touch_event) {
 952   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 953   ui::LatencyInfo latency_info =
 954       CreateRWHLatencyInfoIfNotExist(NULL, touch_event.type);
 955   TouchEventWithLatencyInfo touch_with_latency(touch_event, latency_info);
 956   input_router_->SendTouchEvent(touch_with_latency);
 957 }
 958
 959 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 960       const blink::WebTouchEvent& touch_event,
 961       const ui::LatencyInfo& ui_latency) {
 962   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 963
 964   // Always forward TouchEvents for touch stream consistency. They will be
 965   // ignored if appropriate in FilterInputEvent().
 966
 967   ui::LatencyInfo latency_info =
 968       CreateRWHLatencyInfoIfNotExist(&ui_latency, touch_event.type);
 969   TouchEventWithLatencyInfo touch_with_latency(touch_event, latency_info);
 970
 971   if (touch_emulator_ &&
 972       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 973     if (view_) {
 974       view_->ProcessAckedTouchEvent(
 975           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 976     }
 977     return;
 978   }
 979
 980   input_router_->SendTouchEvent(touch_with_latency);
 981 }
 982
 983 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 984     const NativeWebKeyboardEvent& key_event) {
 985   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 986   if (IgnoreInputEvents())
 987     return;
 988
 989   if (!process_->HasConnection())
 990     return;
 991
 992   // First, let keypress listeners take a shot at handling the event.  If a
 993   // listener handles the event, it should not be propagated to the renderer.
 994   if (KeyPressListenersHandleEvent(key_event)) {
 995     // Some keypresses that are accepted by the listener might have follow up
 996     // char events, which should be ignored.
 997     if (key_event.type == WebKeyboardEvent::RawKeyDown)
 998       suppress_next_char_events_ = true;
 999     return;
1000   }
1001
1002   if (key_event.type == WebKeyboardEvent::Char &&
1003       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1004        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1005     OnUserGesture();
1006   }
1007
1008   // Double check the type to make sure caller hasn't sent us nonsense that
1009   // will mess up our key queue.
1010   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1011     return;
1012
1013   if (suppress_next_char_events_) {
1014     // If preceding RawKeyDown event was handled by the browser, then we need
1015     // suppress all Char events generated by it. Please note that, one
1016     // RawKeyDown event may generate multiple Char events, so we can't reset
1017     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1018     if (key_event.type == WebKeyboardEvent::Char)
1019       return;
1020     // We get a KeyUp or a RawKeyDown event.
1021     suppress_next_char_events_ = false;
1022   }
1023
1024   bool is_shortcut = false;
1025
1026   // Only pre-handle the key event if it's not handled by the input method.
1027   if (delegate_ && !key_event.skip_in_browser) {
1028     // We need to set |suppress_next_char_events_| to true if
1029     // PreHandleKeyboardEvent() returns true, but |this| may already be
1030     // destroyed at that time. So set |suppress_next_char_events_| true here,
1031     // then revert it afterwards when necessary.
1032     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1033       suppress_next_char_events_ = true;
1034
1035     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1036     // a hung/malicious renderer from interfering.
1037     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1038       return;
1039
1040     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1041       suppress_next_char_events_ = false;
1042   }
1043
1044   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1045     return;
1046
1047   input_router_->SendKeyboardEvent(
1048       key_event,
1049       CreateRWHLatencyInfoIfNotExist(NULL, key_event.type),
1050       is_shortcut);
1051 }
1052
1053 void RenderWidgetHostImpl::QueueSyntheticGesture(
1054     scoped_ptr<SyntheticGesture> synthetic_gesture,
1055     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1056   if (!synthetic_gesture_controller_ && view_) {
1057     synthetic_gesture_controller_.reset(
1058         new SyntheticGestureController(
1059             view_->CreateSyntheticGestureTarget().Pass()));
1060   }
1061   if (synthetic_gesture_controller_) {
1062     synthetic_gesture_controller_->QueueSyntheticGesture(
1063         synthetic_gesture.Pass(), on_complete);
1064   }
1065 }
1066
1067 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1068   if (!view_)
1069     return;
1070   view_->UpdateCursor(cursor);
1071 }
1072
1073 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1074   Send(new ViewMsg_ShowContextMenu(
1075       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1076 }
1077
1078 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1079   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1080 }
1081
1082 int64 RenderWidgetHostImpl::GetLatencyComponentId() {
1083   return GetRoutingID() | (static_cast<int64>(GetProcess()->GetID()) << 32);
1084 }
1085
1086 // static
1087 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1088   g_check_for_pending_resize_ack = false;
1089 }
1090
1091 ui::LatencyInfo RenderWidgetHostImpl::CreateRWHLatencyInfoIfNotExist(
1092     const ui::LatencyInfo* original, WebInputEvent::Type type) {
1093   ui::LatencyInfo info;
1094   if (original)
1095     info = *original;
1096   // In Aura, gesture event will already carry its original touch event's
1097   // INPUT_EVENT_LATENCY_RWH_COMPONENT.
1098   if (!info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1099                         GetLatencyComponentId(),
1100                         NULL)) {
1101     info.AddLatencyNumber(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
1102                           GetLatencyComponentId(),
1103                           ++last_input_number_);
1104     info.TraceEventType(WebInputEventTraits::GetName(type));
1105   }
1106   return info;
1107 }
1108
1109
1110 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1111     const KeyPressEventCallback& callback) {
1112   key_press_event_callbacks_.push_back(callback);
1113 }
1114
1115 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1116     const KeyPressEventCallback& callback) {
1117   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1118     if (key_press_event_callbacks_[i].Equals(callback)) {
1119       key_press_event_callbacks_.erase(
1120           key_press_event_callbacks_.begin() + i);
1121       return;
1122     }
1123   }
1124 }
1125
1126 void RenderWidgetHostImpl::AddMouseEventCallback(
1127     const MouseEventCallback& callback) {
1128   mouse_event_callbacks_.push_back(callback);
1129 }
1130
1131 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1132     const MouseEventCallback& callback) {
1133   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1134     if (mouse_event_callbacks_[i].Equals(callback)) {
1135       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1136       return;
1137     }
1138   }
1139 }
1140
1141 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1142   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1143   if (view_)
1144     view_->GetScreenInfo(result);
1145   else
1146     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1147   screen_info_out_of_date_ = false;
1148 }
1149
1150 const NativeWebKeyboardEvent*
1151     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1152   return input_router_->GetLastKeyboardEvent();
1153 }
1154
1155 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1156   // The resize message (which may not happen immediately) will carry with it
1157   // the screen info as well as the new size (if the screen has changed scale
1158   // factor).
1159   InvalidateScreenInfo();
1160   WasResized();
1161 }
1162
1163 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1164   screen_info_out_of_date_ = true;
1165   screen_info_.reset();
1166 }
1167
1168 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1169     const base::Callback<void(const unsigned char*,size_t)> callback) {
1170   int id = next_browser_snapshot_id_++;
1171   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1172   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1173 }
1174
1175 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1176                                               size_t offset,
1177                                               const gfx::Range& range) {
1178   if (view_)
1179     view_->SelectionChanged(text, offset, range);
1180 }
1181
1182 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1183     const ViewHostMsg_SelectionBounds_Params& params) {
1184   if (view_) {
1185     view_->SelectionBoundsChanged(params);
1186   }
1187 }
1188
1189 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1190                                                  base::TimeDelta interval) {
1191   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1192 }
1193
1194 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1195                                           int exit_code) {
1196   // Clearing this flag causes us to re-create the renderer when recovering
1197   // from a crashed renderer.
1198   renderer_initialized_ = false;
1199
1200   waiting_for_screen_rects_ack_ = false;
1201
1202   // Must reset these to ensure that keyboard events work with a new renderer.
1203   suppress_next_char_events_ = false;
1204
1205   // Reset some fields in preparation for recovering from a crash.
1206   ResetSizeAndRepaintPendingFlags();
1207   current_size_.SetSize(0, 0);
1208   // After the renderer crashes, the view is destroyed and so the
1209   // RenderWidgetHost cannot track its visibility anymore. We assume such
1210   // RenderWidgetHost to be visible for the sake of internal accounting - be
1211   // careful about changing this - see http://crbug.com/401859.
1212   //
1213   // We need to at least make sure that the RenderProcessHost is notified about
1214   // the |is_hidden_| change, so that the renderer will have correct visibility
1215   // set when respawned.
1216   if (is_hidden_) {
1217     process_->WidgetRestored();
1218     is_hidden_ = false;
1219   }
1220
1221   // Reset this to ensure the hung renderer mechanism is working properly.
1222   in_flight_event_count_ = 0;
1223
1224   if (view_) {
1225     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1226                                                gfx::GLSurfaceHandle());
1227     view_->RenderProcessGone(status, exit_code);
1228     view_ = NULL; // The View should be deleted by RenderProcessGone.
1229     view_weak_.reset();
1230   }
1231
1232   // Reconstruct the input router to ensure that it has fresh state for a new
1233   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1234   // event. (In particular, the above call to view_->RenderProcessGone will
1235   // destroy the aura window, which may dispatch a synthetic mouse move.)
1236   input_router_.reset(new InputRouterImpl(
1237       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1238
1239   synthetic_gesture_controller_.reset();
1240 }
1241
1242 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1243   text_direction_updated_ = true;
1244   text_direction_ = direction;
1245 }
1246
1247 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1248   if (text_direction_updated_)
1249     text_direction_canceled_ = true;
1250 }
1251
1252 void RenderWidgetHostImpl::NotifyTextDirection() {
1253   if (text_direction_updated_) {
1254     if (!text_direction_canceled_)
1255       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1256     text_direction_updated_ = false;
1257     text_direction_canceled_ = false;
1258   }
1259 }
1260
1261 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1262   input_method_active_ = activate;
1263   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1264 }
1265
1266 void RenderWidgetHostImpl::CandidateWindowShown() {
1267   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1268 }
1269
1270 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1271   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1272 }
1273
1274 void RenderWidgetHostImpl::CandidateWindowHidden() {
1275   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1276 }
1277
1278 void RenderWidgetHostImpl::ImeSetComposition(
1279     const base::string16& text,
1280     const std::vector<blink::WebCompositionUnderline>& underlines,
1281     int selection_start,
1282     int selection_end) {
1283   Send(new InputMsg_ImeSetComposition(
1284             GetRoutingID(), text, underlines, selection_start, selection_end));
1285 }
1286
1287 void RenderWidgetHostImpl::ImeConfirmComposition(
1288     const base::string16& text,
1289     const gfx::Range& replacement_range,
1290     bool keep_selection) {
1291   Send(new InputMsg_ImeConfirmComposition(
1292         GetRoutingID(), text, replacement_range, keep_selection));
1293 }
1294
1295 void RenderWidgetHostImpl::ImeCancelComposition() {
1296   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1297             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1298 }
1299
1300 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1301   return gfx::Rect();
1302 }
1303
1304 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1305                                               bool last_unlocked_by_target) {
1306   // Directly reject to lock the mouse. Subclass can override this method to
1307   // decide whether to allow mouse lock or not.
1308   GotResponseToLockMouseRequest(false);
1309 }
1310
1311 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1312   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1313   if (pending_mouse_lock_request_) {
1314     pending_mouse_lock_request_ = false;
1315     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1316   } else if (IsMouseLocked()) {
1317     view_->UnlockMouse();
1318   }
1319 }
1320
1321 bool RenderWidgetHostImpl::IsMouseLocked() const {
1322   return view_ ? view_->IsMouseLocked() : false;
1323 }
1324
1325 bool RenderWidgetHostImpl::IsFullscreen() const {
1326   return false;
1327 }
1328
1329 void RenderWidgetHostImpl::SetShouldAutoResize(bool enable) {
1330   should_auto_resize_ = enable;
1331 }
1332
1333 void RenderWidgetHostImpl::Destroy() {
1334   NotificationService::current()->Notify(
1335       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1336       Source<RenderWidgetHost>(this),
1337       NotificationService::NoDetails());
1338
1339   // Tell the view to die.
1340   // Note that in the process of the view shutting down, it can call a ton
1341   // of other messages on us.  So if you do any other deinitialization here,
1342   // do it after this call to view_->Destroy().
1343   if (view_)
1344     view_->Destroy();
1345
1346   delete this;
1347 }
1348
1349 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1350   NotificationService::current()->Notify(
1351       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1352       Source<RenderWidgetHost>(this),
1353       NotificationService::NoDetails());
1354   is_unresponsive_ = true;
1355   NotifyRendererUnresponsive();
1356 }
1357
1358 void RenderWidgetHostImpl::RendererIsResponsive() {
1359   if (is_unresponsive_) {
1360     is_unresponsive_ = false;
1361     NotifyRendererResponsive();
1362   }
1363 }
1364
1365 void RenderWidgetHostImpl::OnRenderViewReady() {
1366   SendScreenRects();
1367   WasResized();
1368 }
1369
1370 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1371   // TODO(evanm): This synchronously ends up calling "delete this".
1372   // Is that really what we want in response to this message?  I'm matching
1373   // previous behavior of the code here.
1374   Destroy();
1375 }
1376
1377 void RenderWidgetHostImpl::OnClose() {
1378   Shutdown();
1379 }
1380
1381 void RenderWidgetHostImpl::OnSetTooltipText(
1382     const base::string16& tooltip_text,
1383     WebTextDirection text_direction_hint) {
1384   // First, add directionality marks around tooltip text if necessary.
1385   // A naive solution would be to simply always wrap the text. However, on
1386   // windows, Unicode directional embedding characters can't be displayed on
1387   // systems that lack RTL fonts and are instead displayed as empty squares.
1388   //
1389   // To get around this we only wrap the string when we deem it necessary i.e.
1390   // when the locale direction is different than the tooltip direction hint.
1391   //
1392   // Currently, we use element's directionality as the tooltip direction hint.
1393   // An alternate solution would be to set the overall directionality based on
1394   // trying to detect the directionality from the tooltip text rather than the
1395   // element direction.  One could argue that would be a preferable solution
1396   // but we use the current approach to match Fx & IE's behavior.
1397   base::string16 wrapped_tooltip_text = tooltip_text;
1398   if (!tooltip_text.empty()) {
1399     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1400       // Force the tooltip to have LTR directionality.
1401       wrapped_tooltip_text =
1402           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1403     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1404                !base::i18n::IsRTL()) {
1405       // Force the tooltip to have RTL directionality.
1406       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1407     }
1408   }
1409   if (GetView())
1410     view_->SetTooltipText(wrapped_tooltip_text);
1411 }
1412
1413 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1414   waiting_for_screen_rects_ack_ = false;
1415   if (!view_)
1416     return;
1417
1418   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1419       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1420     return;
1421   }
1422
1423   SendScreenRects();
1424 }
1425
1426 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1427   if (view_) {
1428     view_->SetBounds(pos);
1429     Send(new ViewMsg_Move_ACK(routing_id_));
1430   }
1431 }
1432
1433 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1434     const IPC::Message& message) {
1435   // This trace event is used in
1436   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1437   TRACE_EVENT0("test_fps",
1438                TRACE_DISABLED_BY_DEFAULT("OnSwapCompositorFrame"));
1439   ViewHostMsg_SwapCompositorFrame::Param param;
1440   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1441     return false;
1442   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1443   uint32 output_surface_id = param.a;
1444   param.b.AssignTo(frame.get());
1445   std::vector<IPC::Message> messages_to_deliver_with_frame;
1446   messages_to_deliver_with_frame.swap(param.c);
1447
1448   for (size_t i = 0; i < frame->metadata.latency_info.size(); i++)
1449     AddLatencyInfoComponentIds(&frame->metadata.latency_info[i]);
1450
1451   input_router_->OnViewUpdated(
1452       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1453
1454   if (view_) {
1455     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1456     view_->DidReceiveRendererFrame();
1457   } else {
1458     cc::CompositorFrameAck ack;
1459     if (frame->gl_frame_data) {
1460       ack.gl_frame_data = frame->gl_frame_data.Pass();
1461       ack.gl_frame_data->sync_point = 0;
1462     } else if (frame->delegated_frame_data) {
1463       cc::TransferableResource::ReturnResources(
1464           frame->delegated_frame_data->resource_list,
1465           &ack.resources);
1466     } else if (frame->software_frame_data) {
1467       ack.last_software_frame_id = frame->software_frame_data->id;
1468     }
1469     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1470                                process_->GetID(), ack);
1471   }
1472
1473   RenderProcessHost* rph = GetProcess();
1474   for (std::vector<IPC::Message>::const_iterator i =
1475            messages_to_deliver_with_frame.begin();
1476        i != messages_to_deliver_with_frame.end();
1477        ++i) {
1478     rph->OnMessageReceived(*i);
1479     if (i->dispatch_error())
1480       rph->OnBadMessageReceived(*i);
1481   }
1482   messages_to_deliver_with_frame.clear();
1483
1484   return true;
1485 }
1486
1487 void RenderWidgetHostImpl::OnFlingingStopped() {
1488   if (view_)
1489     view_->DidStopFlinging();
1490 }
1491
1492 void RenderWidgetHostImpl::OnUpdateRect(
1493     const ViewHostMsg_UpdateRect_Params& params) {
1494   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1495   TimeTicks paint_start = TimeTicks::Now();
1496
1497   // Update our knowledge of the RenderWidget's size.
1498   current_size_ = params.view_size;
1499
1500   bool is_resize_ack =
1501       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1502
1503   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1504   // that will end up reaching GetBackingStore.
1505   if (is_resize_ack) {
1506     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1507     resize_ack_pending_ = false;
1508   }
1509
1510   bool is_repaint_ack =
1511       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1512   if (is_repaint_ack) {
1513     DCHECK(repaint_ack_pending_);
1514     TRACE_EVENT_ASYNC_END0(
1515         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1516     repaint_ack_pending_ = false;
1517     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1518     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1519   }
1520
1521   DCHECK(!params.view_size.IsEmpty());
1522
1523   DidUpdateBackingStore(params, paint_start);
1524
1525   if (should_auto_resize_) {
1526     bool post_callback = new_auto_size_.IsEmpty();
1527     new_auto_size_ = params.view_size;
1528     if (post_callback) {
1529       base::MessageLoop::current()->PostTask(
1530           FROM_HERE,
1531           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1532                      weak_factory_.GetWeakPtr()));
1533     }
1534   }
1535
1536   // Log the time delta for processing a paint message. On platforms that don't
1537   // support asynchronous painting, this is equivalent to
1538   // MPArch.RWH_TotalPaintTime.
1539   TimeDelta delta = TimeTicks::Now() - paint_start;
1540   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1541 }
1542
1543 void RenderWidgetHostImpl::DidUpdateBackingStore(
1544     const ViewHostMsg_UpdateRect_Params& params,
1545     const TimeTicks& paint_start) {
1546   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1547   TimeTicks update_start = TimeTicks::Now();
1548
1549   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1550   // will not be re-issued, so must move them now, regardless of whether we
1551   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1552   // in the process could dispatch other window messages which could cause the
1553   // view to be destroyed.
1554   if (view_)
1555     view_->MovePluginWindows(params.plugin_window_moves);
1556
1557   NotificationService::current()->Notify(
1558       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1559       Source<RenderWidgetHost>(this),
1560       NotificationService::NoDetails());
1561
1562   // We don't need to update the view if the view is hidden. We must do this
1563   // early return after the ACK is sent, however, or the renderer will not send
1564   // us more data.
1565   if (is_hidden_)
1566     return;
1567
1568   // If we got a resize ack, then perhaps we have another resize to send?
1569   bool is_resize_ack =
1570       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1571   if (is_resize_ack)
1572     WasResized();
1573
1574   // Log the time delta for processing a paint message.
1575   TimeTicks now = TimeTicks::Now();
1576   TimeDelta delta = now - update_start;
1577   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1578 }
1579
1580 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1581     const SyntheticGesturePacket& gesture_packet) {
1582   // Only allow untrustworthy gestures if explicitly enabled.
1583   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1584           cc::switches::kEnableGpuBenchmarking)) {
1585     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH7"));
1586     GetProcess()->ReceivedBadMessage();
1587     return;
1588   }
1589
1590   QueueSyntheticGesture(
1591         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1592         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1593                    weak_factory_.GetWeakPtr()));
1594 }
1595
1596 void RenderWidgetHostImpl::OnFocus() {
1597   // Only RenderViewHost can deal with that message.
1598   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH4"));
1599   GetProcess()->ReceivedBadMessage();
1600 }
1601
1602 void RenderWidgetHostImpl::OnBlur() {
1603   // Only RenderViewHost can deal with that message.
1604   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
1605   GetProcess()->ReceivedBadMessage();
1606 }
1607
1608 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1609   SetCursor(cursor);
1610 }
1611
1612 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(bool enabled) {
1613   if (enabled) {
1614     if (!touch_emulator_)
1615       touch_emulator_.reset(new TouchEmulator(this));
1616     touch_emulator_->Enable();
1617   } else {
1618     if (touch_emulator_)
1619       touch_emulator_->Disable();
1620   }
1621 }
1622
1623 void RenderWidgetHostImpl::OnTextInputStateChanged(
1624     const ViewHostMsg_TextInputState_Params& params) {
1625   if (view_)
1626     view_->TextInputStateChanged(params);
1627 }
1628
1629 #if defined(OS_MACOSX) || defined(USE_AURA)
1630 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1631     const gfx::Range& range,
1632     const std::vector<gfx::Rect>& character_bounds) {
1633   if (view_)
1634     view_->ImeCompositionRangeChanged(range, character_bounds);
1635 }
1636 #endif
1637
1638 void RenderWidgetHostImpl::OnImeCancelComposition() {
1639   if (view_)
1640     view_->ImeCancelComposition();
1641 }
1642
1643 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1644                                        bool last_unlocked_by_target,
1645                                        bool privileged) {
1646
1647   if (pending_mouse_lock_request_) {
1648     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1649     return;
1650   } else if (IsMouseLocked()) {
1651     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1652     return;
1653   }
1654
1655   pending_mouse_lock_request_ = true;
1656   if (privileged && allow_privileged_mouse_lock_) {
1657     // Directly approve to lock the mouse.
1658     GotResponseToLockMouseRequest(true);
1659   } else {
1660     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1661   }
1662 }
1663
1664 void RenderWidgetHostImpl::OnUnlockMouse() {
1665   RejectMouseLockOrUnlockIfNecessary();
1666 }
1667
1668 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1669     const gfx::Rect& rect,
1670     const gfx::Size& size,
1671     const cc::SharedBitmapId& id) {
1672   DCHECK(!rect.IsEmpty());
1673   DCHECK(!size.IsEmpty());
1674
1675   scoped_ptr<cc::SharedBitmap> bitmap =
1676       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1677   if (!bitmap) {
1678     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH6"));
1679     GetProcess()->ReceivedBadMessage();
1680     return;
1681   }
1682
1683   DCHECK(bitmap->pixels());
1684
1685   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1686   SkBitmap zoomed_bitmap;
1687   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1688
1689 #if defined(OS_ANDROID)
1690   if (view_)
1691     view_->ShowDisambiguationPopup(rect, zoomed_bitmap);
1692 #else
1693   NOTIMPLEMENTED();
1694 #endif
1695
1696   zoomed_bitmap.setPixels(0);
1697   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1698 }
1699
1700 #if defined(OS_WIN)
1701 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1702     gfx::NativeViewId dummy_activation_window) {
1703   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1704
1705   // This may happen as a result of a race condition when the plugin is going
1706   // away.
1707   wchar_t window_title[MAX_PATH + 1] = {0};
1708   if (!IsWindow(hwnd) ||
1709       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1710       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1711     return;
1712   }
1713
1714 #if defined(USE_AURA)
1715   SetParent(hwnd,
1716             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1717 #else
1718   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1719 #endif
1720   dummy_windows_for_activation_.push_back(hwnd);
1721 }
1722
1723 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1724     gfx::NativeViewId dummy_activation_window) {
1725   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1726   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1727   for (; i != dummy_windows_for_activation_.end(); ++i) {
1728     if ((*i) == hwnd) {
1729       dummy_windows_for_activation_.erase(i);
1730       return;
1731     }
1732   }
1733   NOTREACHED() << "Unknown dummy window";
1734 }
1735 #endif
1736
1737 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1738   ignore_input_events_ = ignore_input_events;
1739 }
1740
1741 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1742     const NativeWebKeyboardEvent& event) {
1743   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1744     return false;
1745
1746   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1747     size_t original_size = key_press_event_callbacks_.size();
1748     if (key_press_event_callbacks_[i].Run(event))
1749       return true;
1750
1751     // Check whether the callback that just ran removed itself, in which case
1752     // the iterator needs to be decremented to properly account for the removal.
1753     size_t current_size = key_press_event_callbacks_.size();
1754     if (current_size != original_size) {
1755       DCHECK_EQ(original_size - 1, current_size);
1756       --i;
1757     }
1758   }
1759
1760   return false;
1761 }
1762
1763 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1764     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1765   // Don't ignore touch cancel events, since they may be sent while input
1766   // events are being ignored in order to keep the renderer from getting
1767   // confused about how many touches are active.
1768   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1769     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1770
1771   if (!process_->HasConnection())
1772     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1773
1774   if (event.type == WebInputEvent::MouseDown)
1775     OnUserGesture();
1776
1777   return view_ ? view_->FilterInputEvent(event)
1778                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1779 }
1780
1781 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1782   StartHangMonitorTimeout(
1783       TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
1784   increment_in_flight_event_count();
1785 }
1786
1787 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1788   DCHECK_GE(in_flight_event_count_, 0);
1789   if (decrement_in_flight_event_count() <= 0) {
1790     // Cancel pending hung renderer checks since the renderer is responsive.
1791     StopHangMonitorTimeout();
1792   } else {
1793     // The renderer is responsive, but there are in-flight events to wait for.
1794     RestartHangMonitorTimeout();
1795   }
1796 }
1797
1798 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1799   has_touch_handler_ = has_handlers;
1800 }
1801
1802 void RenderWidgetHostImpl::DidFlush() {
1803   if (synthetic_gesture_controller_)
1804     synthetic_gesture_controller_->OnDidFlushInput();
1805   if (view_)
1806     view_->OnDidFlushInput();
1807 }
1808
1809 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1810   if (view_)
1811     view_->DidOverscroll(params);
1812 }
1813
1814 void RenderWidgetHostImpl::OnKeyboardEventAck(
1815       const NativeWebKeyboardEvent& event,
1816       InputEventAckState ack_result) {
1817 #if defined(OS_MACOSX)
1818   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1819     return;
1820 #endif
1821
1822   // We only send unprocessed key event upwards if we are not hidden,
1823   // because the user has moved away from us and no longer expect any effect
1824   // of this key event.
1825   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1826   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1827     delegate_->HandleKeyboardEvent(event);
1828
1829     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1830     // (i.e.  in the case of Ctrl+W, where the call to
1831     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1832   }
1833 }
1834
1835 void RenderWidgetHostImpl::OnWheelEventAck(
1836     const MouseWheelEventWithLatencyInfo& wheel_event,
1837     InputEventAckState ack_result) {
1838   if (!wheel_event.latency.FindLatency(
1839           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1840     // MouseWheelEvent latency ends when it is acked but does not cause any
1841     // rendering scheduled.
1842     ui::LatencyInfo latency = wheel_event.latency;
1843     latency.AddLatencyNumber(
1844         ui::INPUT_EVENT_LATENCY_TERMINATED_MOUSE_COMPONENT, 0, 0);
1845   }
1846
1847   if (!is_hidden() && view_) {
1848     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1849         delegate_->HandleWheelEvent(wheel_event.event)) {
1850       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1851     }
1852     view_->WheelEventAck(wheel_event.event, ack_result);
1853   }
1854 }
1855
1856 void RenderWidgetHostImpl::OnGestureEventAck(
1857     const GestureEventWithLatencyInfo& event,
1858     InputEventAckState ack_result) {
1859   if (!event.latency.FindLatency(
1860           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1861     // GestureEvent latency ends when it is acked but does not cause any
1862     // rendering scheduled.
1863     ui::LatencyInfo latency = event.latency;
1864     latency.AddLatencyNumber(
1865         ui::INPUT_EVENT_LATENCY_TERMINATED_GESTURE_COMPONENT, 0 ,0);
1866   }
1867
1868   if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED) {
1869     if (delegate_->HandleGestureEvent(event.event))
1870       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1871   }
1872
1873   if (view_)
1874     view_->GestureEventAck(event.event, ack_result);
1875 }
1876
1877 void RenderWidgetHostImpl::OnTouchEventAck(
1878     const TouchEventWithLatencyInfo& event,
1879     InputEventAckState ack_result) {
1880   TouchEventWithLatencyInfo touch_event = event;
1881   touch_event.latency.AddLatencyNumber(
1882       ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT, 0, 0);
1883   // TouchEvent latency ends at ack if it didn't cause any rendering.
1884   if (!touch_event.latency.FindLatency(
1885           ui::INPUT_EVENT_LATENCY_RENDERING_SCHEDULED_COMPONENT, 0, NULL)) {
1886     touch_event.latency.AddLatencyNumber(
1887         ui::INPUT_EVENT_LATENCY_TERMINATED_TOUCH_COMPONENT, 0, 0);
1888   }
1889   ComputeTouchLatency(touch_event.latency);
1890
1891   if (touch_emulator_ &&
1892       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1893     return;
1894   }
1895
1896   if (view_)
1897     view_->ProcessAckedTouchEvent(touch_event, ack_result);
1898 }
1899
1900 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1901   if (type == BAD_ACK_MESSAGE) {
1902     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
1903     process_->ReceivedBadMessage();
1904   } else if (type == UNEXPECTED_EVENT_TYPE) {
1905     suppress_next_char_events_ = false;
1906   }
1907 }
1908
1909 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1910     SyntheticGesture::Result result) {
1911   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1912 }
1913
1914 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1915   return ignore_input_events_ || process_->IgnoreInputEvents();
1916 }
1917
1918 bool RenderWidgetHostImpl::ShouldForwardTouchEvent() const {
1919   // It's important that the emulator sees a complete native touch stream,
1920   // allowing it to perform touch filtering as appropriate.
1921   // TODO(dgozman): Remove when touch stream forwarding issues resolved, see
1922   // crbug.com/375940.
1923   if (touch_emulator_ && touch_emulator_->enabled())
1924     return true;
1925
1926   return input_router_->ShouldForwardTouchEvent();
1927 }
1928
1929 void RenderWidgetHostImpl::StartUserGesture() {
1930   OnUserGesture();
1931 }
1932
1933 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1934   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1935 }
1936
1937 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1938     const std::vector<EditCommand>& commands) {
1939   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1940 }
1941
1942 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1943                                               const std::string& value) {
1944   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1945 }
1946
1947 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1948     const gfx::Rect& rect) {
1949   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1950 }
1951
1952 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1953   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1954 }
1955
1956 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1957   if (!allowed) {
1958     RejectMouseLockOrUnlockIfNecessary();
1959     return false;
1960   } else {
1961     if (!pending_mouse_lock_request_) {
1962       // This is possible, e.g., the plugin sends us an unlock request before
1963       // the user allows to lock to mouse.
1964       return false;
1965     }
1966
1967     pending_mouse_lock_request_ = false;
1968     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1969       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1970       return false;
1971     } else {
1972       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1973       return true;
1974     }
1975   }
1976 }
1977
1978 // static
1979 void RenderWidgetHostImpl::AcknowledgeBufferPresent(
1980     int32 route_id, int gpu_host_id,
1981     const AcceleratedSurfaceMsg_BufferPresented_Params& params) {
1982   GpuProcessHostUIShim* ui_shim = GpuProcessHostUIShim::FromID(gpu_host_id);
1983   if (ui_shim) {
1984     ui_shim->Send(new AcceleratedSurfaceMsg_BufferPresented(route_id,
1985                                                             params));
1986   }
1987 }
1988
1989 // static
1990 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1991     int32 route_id,
1992     uint32 output_surface_id,
1993     int renderer_host_id,
1994     const cc::CompositorFrameAck& ack) {
1995   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1996   if (!host)
1997     return;
1998   host->Send(new ViewMsg_SwapCompositorFrameAck(
1999       route_id, output_surface_id, ack));
2000 }
2001
2002 // static
2003 void RenderWidgetHostImpl::SendReclaimCompositorResources(
2004     int32 route_id,
2005     uint32 output_surface_id,
2006     int renderer_host_id,
2007     const cc::CompositorFrameAck& ack) {
2008   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
2009   if (!host)
2010     return;
2011   host->Send(
2012       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
2013 }
2014
2015 void RenderWidgetHostImpl::DelayedAutoResized() {
2016   gfx::Size new_size = new_auto_size_;
2017   // Clear the new_auto_size_ since the empty value is used as a flag to
2018   // indicate that no callback is in progress (i.e. without this line
2019   // DelayedAutoResized will not get called again).
2020   new_auto_size_.SetSize(0, 0);
2021   if (!should_auto_resize_)
2022     return;
2023
2024   OnRenderAutoResized(new_size);
2025 }
2026
2027 void RenderWidgetHostImpl::DetachDelegate() {
2028   delegate_ = NULL;
2029 }
2030
2031 void RenderWidgetHostImpl::ComputeTouchLatency(
2032     const ui::LatencyInfo& latency_info) {
2033   ui::LatencyInfo::LatencyComponent ui_component;
2034   ui::LatencyInfo::LatencyComponent rwh_component;
2035   ui::LatencyInfo::LatencyComponent acked_component;
2036
2037   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_UI_COMPONENT,
2038                                 0,
2039                                 &ui_component) ||
2040       !latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2041                                 GetLatencyComponentId(),
2042                                 &rwh_component))
2043     return;
2044
2045   DCHECK(ui_component.event_count == 1);
2046   DCHECK(rwh_component.event_count == 1);
2047
2048   base::TimeDelta ui_delta =
2049       rwh_component.event_time - ui_component.event_time;
2050   UMA_HISTOGRAM_CUSTOM_COUNTS(
2051       "Event.Latency.Browser.TouchUI",
2052       ui_delta.InMicroseconds(),
2053       1,
2054       20000,
2055       100);
2056
2057   if (latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_ACKED_TOUCH_COMPONENT,
2058                                0,
2059                                &acked_component)) {
2060     DCHECK(acked_component.event_count == 1);
2061     base::TimeDelta acked_delta =
2062         acked_component.event_time - rwh_component.event_time;
2063     UMA_HISTOGRAM_CUSTOM_COUNTS(
2064         "Event.Latency.Browser.TouchAcked",
2065         acked_delta.InMicroseconds(),
2066         1,
2067         1000000,
2068         100);
2069   }
2070 }
2071
2072 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
2073   ui::LatencyInfo::LatencyComponent window_snapshot_component;
2074   if (latency_info.FindLatency(ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2075                                GetLatencyComponentId(),
2076                                &window_snapshot_component)) {
2077     WindowOldSnapshotReachedScreen(
2078         static_cast<int>(window_snapshot_component.sequence_number));
2079   }
2080   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2081                                GetLatencyComponentId(),
2082                                &window_snapshot_component)) {
2083     int sequence_number = static_cast<int>(
2084         window_snapshot_component.sequence_number);
2085 #if defined(OS_MACOSX)
2086     // On Mac, when using CoreAnmation, there is a delay between when content
2087     // is drawn to the screen, and when the snapshot will actually pick up
2088     // that content. Insert a manual delay of 1/6th of a second (to simulate
2089     // 10 frames at 60 fps) before actually taking the snapshot.
2090     base::MessageLoop::current()->PostDelayedTask(
2091         FROM_HERE,
2092         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2093                    weak_factory_.GetWeakPtr(),
2094                    sequence_number),
2095         base::TimeDelta::FromSecondsD(1. / 6));
2096 #else
2097     WindowSnapshotReachedScreen(sequence_number);
2098 #endif
2099   }
2100
2101   ui::LatencyInfo::LatencyComponent swap_component;
2102   if (!latency_info.FindLatency(
2103           ui::INPUT_EVENT_LATENCY_TERMINATED_FRAME_SWAP_COMPONENT,
2104           0,
2105           &swap_component)) {
2106     return;
2107   }
2108   ui::LatencyInfo::LatencyComponent tab_switch_component;
2109   if (latency_info.FindLatency(ui::TAB_SHOW_COMPONENT,
2110                                GetLatencyComponentId(),
2111                                &tab_switch_component)) {
2112     base::TimeDelta delta =
2113         swap_component.event_time - tab_switch_component.event_time;
2114     for (size_t i = 0; i < tab_switch_component.event_count; i++) {
2115       UMA_HISTOGRAM_TIMES("MPArch.RWH_TabSwitchPaintDuration", delta);
2116     }
2117   }
2118
2119   ui::LatencyInfo::LatencyComponent rwh_component;
2120   if (!latency_info.FindLatency(ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT,
2121                                 GetLatencyComponentId(),
2122                                 &rwh_component)) {
2123     return;
2124   }
2125
2126   ui::LatencyInfo::LatencyComponent original_component;
2127   if (latency_info.FindLatency(
2128           ui::INPUT_EVENT_LATENCY_SCROLL_UPDATE_ORIGINAL_COMPONENT,
2129           GetLatencyComponentId(),
2130           &original_component)) {
2131     // This UMA metric tracks the time from when the original touch event is
2132     // created (averaged if there are multiple) to when the scroll gesture
2133     // results in final frame swap.
2134     base::TimeDelta delta =
2135         swap_component.event_time - original_component.event_time;
2136     for (size_t i = 0; i < original_component.event_count; i++) {
2137       UMA_HISTOGRAM_CUSTOM_COUNTS(
2138           "Event.Latency.TouchToScrollUpdateSwap",
2139           delta.InMicroseconds(),
2140           1,
2141           1000000,
2142           100);
2143     }
2144   }
2145 }
2146
2147 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2148   view_->DidReceiveRendererFrame();
2149 }
2150
2151 void RenderWidgetHostImpl::WindowSnapshotAsyncCallback(
2152     int routing_id,
2153     int snapshot_id,
2154     gfx::Size snapshot_size,
2155     scoped_refptr<base::RefCountedBytes> png_data) {
2156   if (!png_data.get()) {
2157     std::vector<unsigned char> png_vector;
2158     Send(new ViewMsg_WindowSnapshotCompleted(
2159         routing_id, snapshot_id, gfx::Size(), png_vector));
2160     return;
2161   }
2162
2163   Send(new ViewMsg_WindowSnapshotCompleted(
2164       routing_id, snapshot_id, snapshot_size, png_data->data()));
2165 }
2166
2167 void RenderWidgetHostImpl::WindowOldSnapshotReachedScreen(int snapshot_id) {
2168   DCHECK(base::MessageLoopForUI::IsCurrent());
2169
2170   std::vector<unsigned char> png;
2171
2172   // This feature is behind the kEnableGpuBenchmarking command line switch
2173   // because it poses security concerns and should only be used for testing.
2174   const base::CommandLine& command_line =
2175       *base::CommandLine::ForCurrentProcess();
2176   if (!command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
2177     Send(new ViewMsg_WindowSnapshotCompleted(
2178         GetRoutingID(), snapshot_id, gfx::Size(), png));
2179     return;
2180   }
2181
2182   gfx::Rect view_bounds = GetView()->GetViewBounds();
2183   gfx::Rect snapshot_bounds(view_bounds.size());
2184   gfx::Size snapshot_size = snapshot_bounds.size();
2185
2186   if (ui::GrabViewSnapshot(
2187           GetView()->GetNativeView(), &png, snapshot_bounds)) {
2188     Send(new ViewMsg_WindowSnapshotCompleted(
2189         GetRoutingID(), snapshot_id, snapshot_size, png));
2190     return;
2191   }
2192
2193   ui::GrabViewSnapshotAsync(
2194       GetView()->GetNativeView(),
2195       snapshot_bounds,
2196       base::ThreadTaskRunnerHandle::Get(),
2197       base::Bind(&RenderWidgetHostImpl::WindowSnapshotAsyncCallback,
2198                  weak_factory_.GetWeakPtr(),
2199                  GetRoutingID(),
2200                  snapshot_id,
2201                  snapshot_size));
2202 }
2203
2204 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2205   DCHECK(base::MessageLoopForUI::IsCurrent());
2206
2207   gfx::Rect view_bounds = GetView()->GetViewBounds();
2208   gfx::Rect snapshot_bounds(view_bounds.size());
2209
2210   std::vector<unsigned char> png;
2211   if (ui::GrabViewSnapshot(
2212       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2213     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2214     return;
2215   }
2216
2217   ui::GrabViewSnapshotAsync(
2218       GetView()->GetNativeView(),
2219       snapshot_bounds,
2220       base::ThreadTaskRunnerHandle::Get(),
2221       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2222                  weak_factory_.GetWeakPtr(),
2223                  snapshot_id));
2224 }
2225
2226 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2227                                                   const unsigned char* data,
2228                                                   size_t size) {
2229   // Any pending snapshots with a lower ID than the one received are considered
2230   // to be implicitly complete, and returned the same snapshot data.
2231   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2232   while(it != pending_browser_snapshots_.end()) {
2233       if (it->first <= snapshot_id) {
2234         it->second.Run(data, size);
2235         pending_browser_snapshots_.erase(it++);
2236       } else {
2237         ++it;
2238       }
2239   }
2240 }
2241
2242 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2243     int snapshot_id,
2244     scoped_refptr<base::RefCountedBytes> png_data) {
2245   if (png_data.get())
2246     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2247   else
2248     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2249 }
2250
2251 // static
2252 void RenderWidgetHostImpl::CompositorFrameDrawn(
2253     const std::vector<ui::LatencyInfo>& latency_info) {
2254   for (size_t i = 0; i < latency_info.size(); i++) {
2255     std::set<RenderWidgetHostImpl*> rwhi_set;
2256     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2257              latency_info[i].latency_components.begin();
2258          b != latency_info[i].latency_components.end();
2259          ++b) {
2260       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2261           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2262           b->first.first == ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2263           b->first.first == ui::TAB_SHOW_COMPONENT) {
2264         // Matches with GetLatencyComponentId
2265         int routing_id = b->first.second & 0xffffffff;
2266         int process_id = (b->first.second >> 32) & 0xffffffff;
2267         RenderWidgetHost* rwh =
2268             RenderWidgetHost::FromID(process_id, routing_id);
2269         if (!rwh) {
2270           continue;
2271         }
2272         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2273         if (rwhi_set.insert(rwhi).second)
2274           rwhi->FrameSwapped(latency_info[i]);
2275       }
2276     }
2277   }
2278 }
2279
2280 void RenderWidgetHostImpl::AddLatencyInfoComponentIds(
2281     ui::LatencyInfo* latency_info) {
2282   ui::LatencyInfo::LatencyMap new_components;
2283   ui::LatencyInfo::LatencyMap::iterator lc =
2284       latency_info->latency_components.begin();
2285   while (lc != latency_info->latency_components.end()) {
2286     ui::LatencyComponentType component_type = lc->first.first;
2287     if (component_type == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2288         component_type == ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT) {
2289       // Generate a new component entry with the correct component ID
2290       ui::LatencyInfo::LatencyMap::key_type key =
2291           std::make_pair(component_type, GetLatencyComponentId());
2292       new_components[key] = lc->second;
2293
2294       // Remove the old entry
2295       latency_info->latency_components.erase(lc++);
2296     } else {
2297       ++lc;
2298     }
2299   }
2300
2301   // Add newly generated components into the latency info
2302   for (lc = new_components.begin(); lc != new_components.end(); ++lc) {
2303     latency_info->latency_components[lc->first] = lc->second;
2304   }
2305 }
2306
2307 BrowserAccessibilityManager*
2308     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2309   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2310 }
2311
2312 BrowserAccessibilityManager*
2313     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2314   return delegate_ ?
2315       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2316 }
2317
2318 #if defined(OS_WIN)
2319 gfx::NativeViewAccessible
2320     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2321   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2322 }
2323 #endif
2324
2325 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
2326   if (view_)
2327     return view_->PreferredReadbackFormat();
2328   return kN32_SkColorType;
2329 }
2330
2331 }  // namespace content