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/i18n/rtl.h"
  16 #include "base/lazy_instance.h"
  17 #include "base/location.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/single_thread_task_runner.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 "base/trace_event/trace_event.h"
  25 #include "cc/base/switches.h"
  26 #include "cc/output/compositor_frame.h"
  27 #include "cc/output/compositor_frame_ack.h"
  28 #include "content/browser/accessibility/accessibility_mode_helper.h"
  29 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  30 #include "content/browser/bad_message.h"
  31 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  32 #include "content/browser/gpu/compositor_util.h"
  33 #include "content/browser/gpu/gpu_process_host.h"
  34 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  35 #include "content/browser/gpu/gpu_surface_tracker.h"
  36 #include "content/browser/renderer_host/dip_util.h"
  37 #include "content/browser/renderer_host/frame_metadata_util.h"
  38 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  39 #include "content/browser/renderer_host/input/input_router_impl.h"
  40 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  41 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  42 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  43 #include "content/browser/renderer_host/input/timeout_monitor.h"
  44 #include "content/browser/renderer_host/input/touch_emulator.h"
  45 #include "content/browser/renderer_host/render_process_host_impl.h"
  46 #include "content/browser/renderer_host/render_view_host_impl.h"
  47 #include "content/browser/renderer_host/render_widget_helper.h"
  48 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  49 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  50 #include "content/browser/renderer_host/render_widget_resize_helper.h"
  51 #include "content/common/content_constants_internal.h"
  52 #include "content/common/cursors/webcursor.h"
  53 #include "content/common/frame_messages.h"
  54 #include "content/common/gpu/gpu_messages.h"
  55 #include "content/common/host_shared_bitmap_manager.h"
  56 #include "content/common/input_messages.h"
  57 #include "content/common/view_messages.h"
  58 #include "content/public/browser/native_web_keyboard_event.h"
  59 #include "content/public/browser/notification_service.h"
  60 #include "content/public/browser/notification_types.h"
  61 #include "content/public/browser/render_widget_host_iterator.h"
  62 #include "content/public/common/content_constants.h"
  63 #include "content/public/common/content_switches.h"
  64 #include "content/public/common/result_codes.h"
  65 #include "content/public/common/web_preferences.h"
  66 #include "gpu/GLES2/gl2extchromium.h"
  67 #include "gpu/command_buffer/service/gpu_switches.h"
  68 #include "skia/ext/image_operations.h"
  69 #include "skia/ext/platform_canvas.h"
  70 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  71 #include "ui/events/event.h"
  72 #include "ui/events/keycodes/keyboard_codes.h"
  73 #include "ui/gfx/geometry/size_conversions.h"
  74 #include "ui/gfx/geometry/vector2d_conversions.h"
  75 #include "ui/gfx/skbitmap_operations.h"
  76 #include "ui/snapshot/snapshot.h"
  77
  78 #if defined(OS_WIN)
  79 #include "content/common/plugin_constants_win.h"
  80 #endif
  81
  82 using base::Time;
  83 using base::TimeDelta;
  84 using base::TimeTicks;
  85 using blink::WebGestureEvent;
  86 using blink::WebInputEvent;
  87 using blink::WebKeyboardEvent;
  88 using blink::WebMouseEvent;
  89 using blink::WebMouseWheelEvent;
  90 using blink::WebTextDirection;
  91
  92 namespace content {
  93 namespace {
  94
  95 bool g_check_for_pending_resize_ack = true;
  96
  97 typedef std::pair<int32, int32> RenderWidgetHostID;
  98 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  99     RoutingIDWidgetMap;
 100 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 101     LAZY_INSTANCE_INITIALIZER;
 102
 103 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 104 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 105 // iteration (or NULL if there isn't any left).
 106 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 107  public:
 108   RenderWidgetHostIteratorImpl()
 109       : current_index_(0) {
 110   }
 111
 112   ~RenderWidgetHostIteratorImpl() override {}
 113
 114   void Add(RenderWidgetHost* host) {
 115     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 116                                         host->GetRoutingID()));
 117   }
 118
 119   // RenderWidgetHostIterator:
 120   RenderWidgetHost* GetNextHost() override {
 121     RenderWidgetHost* host = NULL;
 122     while (current_index_ < hosts_.size() && !host) {
 123       RenderWidgetHostID id = hosts_[current_index_];
 124       host = RenderWidgetHost::FromID(id.first, id.second);
 125       ++current_index_;
 126     }
 127     return host;
 128   }
 129
 130  private:
 131   std::vector<RenderWidgetHostID> hosts_;
 132   size_t current_index_;
 133
 134   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 135 };
 136
 137 }  // namespace
 138
 139 ///////////////////////////////////////////////////////////////////////////////
 140 // RenderWidgetHostImpl
 141
 142 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 143                                            RenderProcessHost* process,
 144                                            int routing_id,
 145                                            bool hidden)
 146     : view_(NULL),
 147       hung_renderer_delay_(
 148           base::TimeDelta::FromMilliseconds(kHungRendererDelayMs)),
 149       renderer_initialized_(false),
 150       delegate_(delegate),
 151       process_(process),
 152       routing_id_(routing_id),
 153       surface_id_(0),
 154       is_loading_(false),
 155       is_hidden_(hidden),
 156       repaint_ack_pending_(false),
 157       resize_ack_pending_(false),
 158       auto_resize_enabled_(false),
 159       waiting_for_screen_rects_ack_(false),
 160       needs_repainting_on_restore_(false),
 161       is_unresponsive_(false),
 162       in_flight_event_count_(0),
 163       in_get_backing_store_(false),
 164       ignore_input_events_(false),
 165       text_direction_updated_(false),
 166       text_direction_(blink::WebTextDirectionLeftToRight),
 167       text_direction_canceled_(false),
 168       suppress_next_char_events_(false),
 169       pending_mouse_lock_request_(false),
 170       allow_privileged_mouse_lock_(false),
 171       has_touch_handler_(false),
 172       next_browser_snapshot_id_(1),
 173       owned_by_render_frame_host_(false),
 174       is_focused_(false),
 175       weak_factory_(this) {
 176   CHECK(delegate_);
 177   if (routing_id_ == MSG_ROUTING_NONE) {
 178     routing_id_ = process_->GetNextRoutingID();
 179     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 180         process_->GetID(),
 181         routing_id_);
 182   } else {
 183     // TODO(piman): This is a O(N) lookup, where we could forward the
 184     // information from the RenderWidgetHelper. The problem is that doing so
 185     // currently leaks outside of content all the way to chrome classes, and
 186     // would be a layering violation. Since we don't expect more than a few
 187     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 188     // problem, for example by tracking in the RenderWidgetHelper the routing id
 189     // (and surface id) that have been created, but whose RWH haven't yet.
 190     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 191         process_->GetID(),
 192         routing_id_);
 193     DCHECK(surface_id_);
 194   }
 195
 196   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 197       g_routing_id_widget_map.Get().insert(std::make_pair(
 198           RenderWidgetHostID(process->GetID(), routing_id_), this));
 199   CHECK(result.second) << "Inserting a duplicate item!";
 200   process_->AddRoute(routing_id_, this);
 201
 202   // If we're initially visible, tell the process host that we're alive.
 203   // Otherwise we'll notify the process host when we are first shown.
 204   if (!hidden)
 205     process_->WidgetRestored();
 206
 207   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 208
 209   input_router_.reset(new InputRouterImpl(
 210       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 211
 212   touch_emulator_.reset();
 213
 214   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 215       IsRenderView() ? RenderViewHost::From(this) : NULL);
 216   if (BrowserPluginGuest::IsGuest(rvh) ||
 217       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 218           switches::kDisableHangMonitor)) {
 219     hang_monitor_timeout_.reset(new TimeoutMonitor(
 220         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 221                    weak_factory_.GetWeakPtr())));
 222   }
 223 }
 224
 225 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 226   if (view_weak_)
 227     view_weak_->RenderWidgetHostGone();
 228   SetView(NULL);
 229
 230   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 231   surface_id_ = 0;
 232
 233   process_->RemoveRoute(routing_id_);
 234   g_routing_id_widget_map.Get().erase(
 235       RenderWidgetHostID(process_->GetID(), routing_id_));
 236
 237   if (delegate_)
 238     delegate_->RenderWidgetDeleted(this);
 239 }
 240
 241 // static
 242 RenderWidgetHost* RenderWidgetHost::FromID(
 243     int32 process_id,
 244     int32 routing_id) {
 245   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 246 }
 247
 248 // static
 249 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 250     int32 process_id,
 251     int32 routing_id) {
 252   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 253   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 254   RoutingIDWidgetMap::iterator it = widgets->find(
 255       RenderWidgetHostID(process_id, routing_id));
 256   return it == widgets->end() ? NULL : it->second;
 257 }
 258
 259 // static
 260 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 261   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 262   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 263   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 264        it != widgets->end();
 265        ++it) {
 266     RenderWidgetHost* widget = it->second;
 267
 268     if (!widget->IsRenderView()) {
 269       hosts->Add(widget);
 270       continue;
 271     }
 272
 273     // Add only active RenderViewHosts.
 274     RenderViewHost* rvh = RenderViewHost::From(widget);
 275     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 276       hosts->Add(widget);
 277   }
 278
 279   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 280 }
 281
 282 // static
 283 scoped_ptr<RenderWidgetHostIterator>
 284 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 285   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 286   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 287   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 288        it != widgets->end();
 289        ++it) {
 290     hosts->Add(it->second);
 291   }
 292
 293   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 294 }
 295
 296 // static
 297 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 298   return rwh->AsRenderWidgetHostImpl();
 299 }
 300
 301 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 302   if (view)
 303     view_weak_ = view->GetWeakPtr();
 304   else
 305     view_weak_.reset();
 306   view_ = view;
 307
 308   // If the renderer has not yet been initialized, then the surface ID
 309   // namespace will be sent during initialization.
 310   if (view_ && renderer_initialized_) {
 311     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 312                                            view_->GetSurfaceIdNamespace()));
 313   }
 314
 315   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 316       surface_id_, GetCompositingSurface());
 317
 318   synthetic_gesture_controller_.reset();
 319 }
 320
 321 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 322   return process_;
 323 }
 324
 325 int RenderWidgetHostImpl::GetRoutingID() const {
 326   return routing_id_;
 327 }
 328
 329 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 330   return view_;
 331 }
 332
 333 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 334   return this;
 335 }
 336
 337 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 338   if (view_)
 339     return view_->GetNativeViewId();
 340   return 0;
 341 }
 342
 343 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 344   if (view_)
 345     return view_->GetCompositingSurface();
 346   return gfx::GLSurfaceHandle();
 347 }
 348
 349 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 350   resize_ack_pending_ = false;
 351   if (repaint_ack_pending_) {
 352     TRACE_EVENT_ASYNC_END0(
 353         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 354   }
 355   repaint_ack_pending_ = false;
 356   if (old_resize_params_)
 357     old_resize_params_->new_size = gfx::Size();
 358 }
 359
 360 void RenderWidgetHostImpl::SendScreenRects() {
 361   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 362     return;
 363
 364   if (is_hidden_) {
 365     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 366     // happens on Win & Mac, and when the view is shown it'll call this again.
 367     return;
 368   }
 369
 370   if (!view_)
 371     return;
 372
 373   last_view_screen_rect_ = view_->GetViewBounds();
 374   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 375   Send(new ViewMsg_UpdateScreenRects(
 376       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 377   if (delegate_)
 378     delegate_->DidSendScreenRects(this);
 379   waiting_for_screen_rects_ack_ = true;
 380 }
 381
 382 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 383   suppress_next_char_events_ = true;
 384 }
 385
 386 void RenderWidgetHostImpl::FlushInput() {
 387   input_router_->RequestNotificationWhenFlushed();
 388   if (synthetic_gesture_controller_)
 389     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 390 }
 391
 392 void RenderWidgetHostImpl::SetNeedsFlush() {
 393   if (view_)
 394     view_->OnSetNeedsFlushInput();
 395 }
 396
 397 void RenderWidgetHostImpl::Init() {
 398   DCHECK(process_->HasConnection());
 399
 400   renderer_initialized_ = true;
 401
 402   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 403       surface_id_, GetCompositingSurface());
 404
 405   // Send the ack along with the information on placement.
 406   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 407   GetProcess()->ResumeRequestsForView(routing_id_);
 408
 409   // If the RWHV has not yet been set, the surface ID namespace will get
 410   // passed down by the call to SetView().
 411   if (view_) {
 412     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 413                                            view_->GetSurfaceIdNamespace()));
 414   }
 415
 416   WasResized();
 417 }
 418
 419 void RenderWidgetHostImpl::InitForFrame() {
 420   DCHECK(process_->HasConnection());
 421   renderer_initialized_ = true;
 422 }
 423
 424 void RenderWidgetHostImpl::Shutdown() {
 425   RejectMouseLockOrUnlockIfNecessary();
 426
 427   if (process_->HasConnection()) {
 428     // Tell the renderer object to close.
 429     bool rv = Send(new ViewMsg_Close(routing_id_));
 430     DCHECK(rv);
 431   }
 432
 433   Destroy();
 434 }
 435
 436 bool RenderWidgetHostImpl::IsLoading() const {
 437   return is_loading_;
 438 }
 439
 440 bool RenderWidgetHostImpl::IsRenderView() const {
 441   return false;
 442 }
 443
 444 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 445   bool handled = true;
 446   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 447     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 448     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 449                         OnQueueSyntheticGesture)
 450     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 451                         OnImeCancelComposition)
 452     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 455                         OnUpdateScreenRectsAck)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 458     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 459                                 OnSwapCompositorFrame(msg))
 460     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 462     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputStateChanged,
 465                         OnTextInputStateChanged)
 466     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 469                         OnShowDisambiguationPopup)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 472                         OnSelectionBoundsChanged)
 473 #if defined(OS_WIN)
 474     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 475                         OnWindowlessPluginDummyWindowCreated)
 476     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 477                         OnWindowlessPluginDummyWindowDestroyed)
 478 #endif
 479     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 480                         OnImeCompositionRangeChanged)
 481     IPC_MESSAGE_UNHANDLED(handled = false)
 482   IPC_END_MESSAGE_MAP()
 483
 484   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 485     return true;
 486
 487   if (!handled && view_ && view_->OnMessageReceived(msg))
 488     return true;
 489
 490   return handled;
 491 }
 492
 493 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 494   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 495     return input_router_->SendInput(make_scoped_ptr(msg));
 496
 497   return process_->Send(msg);
 498 }
 499
 500 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 501   is_loading_ = is_loading;
 502   if (!view_)
 503     return;
 504   view_->SetIsLoading(is_loading);
 505 }
 506
 507 void RenderWidgetHostImpl::WasHidden() {
 508   if (is_hidden_)
 509     return;
 510
 511   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 512   is_hidden_ = true;
 513
 514   // Don't bother reporting hung state when we aren't active.
 515   StopHangMonitorTimeout();
 516
 517   // If we have a renderer, then inform it that we are being hidden so it can
 518   // reduce its resource utilization.
 519   Send(new ViewMsg_WasHidden(routing_id_));
 520
 521   // Tell the RenderProcessHost we were hidden.
 522   process_->WidgetHidden();
 523
 524   bool is_visible = false;
 525   NotificationService::current()->Notify(
 526       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 527       Source<RenderWidgetHost>(this),
 528       Details<bool>(&is_visible));
 529 }
 530
 531 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 532   if (!is_hidden_)
 533     return;
 534
 535   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 536   is_hidden_ = false;
 537
 538   SendScreenRects();
 539
 540   // When hidden, timeout monitoring for input events is disabled. Restore it
 541   // now to ensure consistent hang detection.
 542   if (in_flight_event_count_)
 543     RestartHangMonitorTimeout();
 544
 545   // Always repaint on restore.
 546   bool needs_repainting = true;
 547   needs_repainting_on_restore_ = false;
 548   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 549
 550   process_->WidgetRestored();
 551
 552   bool is_visible = true;
 553   NotificationService::current()->Notify(
 554       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 555       Source<RenderWidgetHost>(this),
 556       Details<bool>(&is_visible));
 557
 558   // It's possible for our size to be out of sync with the renderer. The
 559   // following is one case that leads to this:
 560   // 1. WasResized -> Send ViewMsg_Resize to render
 561   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 562   // 3. WasHidden
 563   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 564   //    is hidden. Now renderer/browser out of sync with what they think size
 565   //    is.
 566   // By invoking WasResized the renderer is updated as necessary. WasResized
 567   // does nothing if the sizes are already in sync.
 568   //
 569   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 570   // could handle both the restore and resize at once. This isn't that big a
 571   // deal as RenderWidget::WasShown delays updating, so that the resize from
 572   // WasResized is usually processed before the renderer is painted.
 573   WasResized();
 574 }
 575
 576 bool RenderWidgetHostImpl::GetResizeParams(
 577     ViewMsg_Resize_Params* resize_params) {
 578   *resize_params = ViewMsg_Resize_Params();
 579
 580   GetWebScreenInfo(&resize_params->screen_info);
 581   resize_params->resizer_rect = GetRootWindowResizerRect();
 582
 583   if (view_) {
 584     resize_params->new_size = view_->GetRequestedRendererSize();
 585     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 586     resize_params->top_controls_height = view_->GetTopControlsHeight();
 587     resize_params->top_controls_shrink_blink_size =
 588         view_->DoTopControlsShrinkBlinkSize();
 589     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 590     resize_params->is_fullscreen_granted = IsFullscreenGranted();
 591     resize_params->display_mode = GetDisplayMode();
 592   }
 593
 594   const bool size_changed =
 595       !old_resize_params_ ||
 596       old_resize_params_->new_size != resize_params->new_size ||
 597       (old_resize_params_->physical_backing_size.IsEmpty() &&
 598        !resize_params->physical_backing_size.IsEmpty());
 599   bool dirty = size_changed ||
 600       old_resize_params_->screen_info != resize_params->screen_info ||
 601       old_resize_params_->physical_backing_size !=
 602           resize_params->physical_backing_size ||
 603       old_resize_params_->is_fullscreen_granted !=
 604           resize_params->is_fullscreen_granted ||
 605       old_resize_params_->display_mode != resize_params->display_mode ||
 606       old_resize_params_->top_controls_height !=
 607           resize_params->top_controls_height ||
 608       old_resize_params_->top_controls_shrink_blink_size !=
 609           resize_params->top_controls_shrink_blink_size ||
 610       old_resize_params_->visible_viewport_size !=
 611           resize_params->visible_viewport_size;
 612
 613   // We don't expect to receive an ACK when the requested size or the physical
 614   // backing size is empty, or when the main viewport size didn't change.
 615   resize_params->needs_resize_ack =
 616       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 617       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 618
 619   return dirty;
 620 }
 621
 622 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 623     const ViewMsg_Resize_Params& resize_params) {
 624   resize_ack_pending_ = resize_params.needs_resize_ack;
 625
 626   old_resize_params_ =
 627       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 628 }
 629
 630 void RenderWidgetHostImpl::WasResized() {
 631   // Skip if the |delegate_| has already been detached because
 632   // it's web contents is being deleted.
 633   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 634       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 635     return;
 636   }
 637
 638   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 639   if (!GetResizeParams(params.get()))
 640     return;
 641
 642   bool width_changed =
 643       !old_resize_params_ ||
 644       old_resize_params_->new_size.width() != params->new_size.width();
 645   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 646     resize_ack_pending_ = params->needs_resize_ack;
 647     old_resize_params_.swap(params);
 648   }
 649
 650   if (delegate_)
 651     delegate_->RenderWidgetWasResized(this, width_changed);
 652 }
 653
 654 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 655   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 656 }
 657
 658 void RenderWidgetHostImpl::GotFocus() {
 659   Focus();
 660   if (delegate_)
 661     delegate_->RenderWidgetGotFocus(this);
 662 }
 663
 664 void RenderWidgetHostImpl::Focus() {
 665   is_focused_ = true;
 666
 667   Send(new InputMsg_SetFocus(routing_id_, true));
 668 }
 669
 670 void RenderWidgetHostImpl::Blur() {
 671   is_focused_ = false;
 672
 673   // If there is a pending mouse lock request, we don't want to reject it at
 674   // this point. The user can switch focus back to this view and approve the
 675   // request later.
 676   if (IsMouseLocked())
 677     view_->UnlockMouse();
 678
 679   if (touch_emulator_)
 680     touch_emulator_->CancelTouch();
 681
 682   Send(new InputMsg_SetFocus(routing_id_, false));
 683 }
 684
 685 void RenderWidgetHostImpl::LostCapture() {
 686   if (touch_emulator_)
 687     touch_emulator_->CancelTouch();
 688
 689   Send(new InputMsg_MouseCaptureLost(routing_id_));
 690 }
 691
 692 void RenderWidgetHostImpl::SetActive(bool active) {
 693   Send(new ViewMsg_SetActive(routing_id_, active));
 694 }
 695
 696 void RenderWidgetHostImpl::LostMouseLock() {
 697   Send(new ViewMsg_MouseLockLost(routing_id_));
 698 }
 699
 700 void RenderWidgetHostImpl::ViewDestroyed() {
 701   RejectMouseLockOrUnlockIfNecessary();
 702
 703   // TODO(evanm): tracking this may no longer be necessary;
 704   // eliminate this function if so.
 705   SetView(NULL);
 706 }
 707
 708 void RenderWidgetHostImpl::CopyFromBackingStore(
 709     const gfx::Rect& src_subrect,
 710     const gfx::Size& accelerated_dst_size,
 711     ReadbackRequestCallback& callback,
 712     const SkColorType preferred_color_type) {
 713   if (view_) {
 714     TRACE_EVENT0("browser",
 715         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 716     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 717         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 718     view_->CopyFromCompositingSurface(accelerated_copy_rect,
 719                                       accelerated_dst_size, callback,
 720                                       preferred_color_type);
 721     return;
 722   }
 723
 724   callback.Run(SkBitmap(), content::READBACK_FAILED);
 725 }
 726
 727 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 728   if (view_)
 729     return view_->IsSurfaceAvailableForCopy();
 730   return false;
 731 }
 732
 733 #if defined(OS_ANDROID)
 734 void RenderWidgetHostImpl::LockBackingStore() {
 735   if (view_)
 736     view_->LockCompositingSurface();
 737 }
 738
 739 void RenderWidgetHostImpl::UnlockBackingStore() {
 740   if (view_)
 741     view_->UnlockCompositingSurface();
 742 }
 743 #endif
 744
 745 #if defined(OS_MACOSX)
 746 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 747   TRACE_EVENT0("browser",
 748       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 749
 750   if (!CanPauseForPendingResizeOrRepaints())
 751     return;
 752
 753   WaitForSurface();
 754 }
 755
 756 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 757   // Do not pause if the view is hidden.
 758   if (is_hidden())
 759     return false;
 760
 761   // Do not pause if there is not a paint or resize already coming.
 762   if (!repaint_ack_pending_ && !resize_ack_pending_)
 763     return false;
 764
 765   return true;
 766 }
 767
 768 void RenderWidgetHostImpl::WaitForSurface() {
 769   // How long to (synchronously) wait for the renderer to respond with a
 770   // new frame when our current frame doesn't exist or is the wrong size.
 771   // This timeout impacts the "choppiness" of our window resize.
 772   const int kPaintMsgTimeoutMS = 50;
 773
 774   if (!view_)
 775     return;
 776
 777   // The view_size will be current_size_ for auto-sized views and otherwise the
 778   // size of the view_. (For auto-sized views, current_size_ is updated during
 779   // UpdateRect messages.)
 780   gfx::Size view_size = current_size_;
 781   if (!auto_resize_enabled_) {
 782     // Get the desired size from the current view bounds.
 783     gfx::Rect view_rect = view_->GetViewBounds();
 784     if (view_rect.IsEmpty())
 785       return;
 786     view_size = view_rect.size();
 787   }
 788
 789   TRACE_EVENT2("renderer_host",
 790                "RenderWidgetHostImpl::WaitForSurface",
 791                "width",
 792                base::IntToString(view_size.width()),
 793                "height",
 794                base::IntToString(view_size.height()));
 795
 796   // We should not be asked to paint while we are hidden.  If we are hidden,
 797   // then it means that our consumer failed to call WasShown.
 798   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 799
 800   // We should never be called recursively; this can theoretically lead to
 801   // infinite recursion and almost certainly leads to lower performance.
 802   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 803   base::AutoReset<bool> auto_reset_in_get_backing_store(
 804       &in_get_backing_store_, true);
 805
 806   // We might have a surface that we can use already.
 807   if (view_->HasAcceleratedSurface(view_size))
 808     return;
 809
 810   // Request that the renderer produce a frame of the right size, if it
 811   // hasn't been requested already.
 812   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 813     repaint_start_time_ = TimeTicks::Now();
 814     repaint_ack_pending_ = true;
 815     TRACE_EVENT_ASYNC_BEGIN0(
 816         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 817     Send(new ViewMsg_Repaint(routing_id_, view_size));
 818   }
 819
 820   // Pump a nested message loop until we time out or get a frame of the right
 821   // size.
 822   TimeTicks start_time = TimeTicks::Now();
 823   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 824   TimeTicks timeout_time = start_time + time_left;
 825   while (1) {
 826     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 827     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 828       // For auto-resized views, current_size_ determines the view_size and it
 829       // may have changed during the handling of an UpdateRect message.
 830       if (auto_resize_enabled_)
 831         view_size = current_size_;
 832       if (view_->HasAcceleratedSurface(view_size))
 833         break;
 834     }
 835     time_left = timeout_time - TimeTicks::Now();
 836     if (time_left <= TimeDelta::FromSeconds(0)) {
 837       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 838       break;
 839     }
 840   }
 841
 842   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 843                              TimeTicks::Now() - start_time,
 844                              TimeDelta::FromMilliseconds(1),
 845                              TimeDelta::FromMilliseconds(200), 50);
 846 }
 847 #endif
 848
 849 bool RenderWidgetHostImpl::ScheduleComposite() {
 850   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 851       resize_ack_pending_) {
 852     return false;
 853   }
 854
 855   // Send out a request to the renderer to paint the view if required.
 856   repaint_start_time_ = TimeTicks::Now();
 857   repaint_ack_pending_ = true;
 858   TRACE_EVENT_ASYNC_BEGIN0(
 859       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 860   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 861   return true;
 862 }
 863
 864 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 865   if (hang_monitor_timeout_)
 866     hang_monitor_timeout_->Start(delay);
 867 }
 868
 869 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 870   if (hang_monitor_timeout_)
 871     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 872 }
 873
 874 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 875   if (hang_monitor_timeout_)
 876     hang_monitor_timeout_->Stop();
 877   RendererIsResponsive();
 878 }
 879
 880 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 881   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 882 }
 883
 884 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 885       const blink::WebMouseEvent& mouse_event,
 886       const ui::LatencyInfo& ui_latency) {
 887   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 888                "x", mouse_event.x, "y", mouse_event.y);
 889
 890   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 891     if (mouse_event_callbacks_[i].Run(mouse_event))
 892       return;
 893   }
 894
 895   if (IgnoreInputEvents())
 896     return;
 897
 898   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 899     return;
 900
 901   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 902   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 903   input_router_->SendMouseEvent(mouse_with_latency);
 904
 905   // Pass mouse state to gpu service if the subscribe uniform
 906   // extension is enabled.
 907   if (process_->SubscribeUniformEnabled()) {
 908     gpu::ValueState state;
 909     state.int_value[0] = mouse_event.x;
 910     state.int_value[1] = mouse_event.y;
 911     // TODO(orglofch) Separate the mapping of pending value states to the
 912     // Gpu Service to be per RWH not per process
 913     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 914   }
 915 }
 916
 917 void RenderWidgetHostImpl::ForwardWheelEvent(
 918     const WebMouseWheelEvent& wheel_event) {
 919   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 920 }
 921
 922 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 923       const blink::WebMouseWheelEvent& wheel_event,
 924       const ui::LatencyInfo& ui_latency) {
 925   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardWheelEvent",
 926                "dx", wheel_event.deltaX, "dy", wheel_event.deltaY);
 927
 928   if (IgnoreInputEvents())
 929     return;
 930
 931   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 932     return;
 933
 934   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 935   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 936   input_router_->SendWheelEvent(wheel_with_latency);
 937 }
 938
 939 void RenderWidgetHostImpl::ForwardGestureEvent(
 940     const blink::WebGestureEvent& gesture_event) {
 941   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 942 }
 943
 944 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 945     const blink::WebGestureEvent& gesture_event,
 946     const ui::LatencyInfo& ui_latency) {
 947   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 948   // Early out if necessary, prior to performing latency logic.
 949   if (IgnoreInputEvents())
 950     return;
 951
 952   if (delegate_->PreHandleGestureEvent(gesture_event))
 953     return;
 954
 955   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 956   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 957   input_router_->SendGestureEvent(gesture_with_latency);
 958 }
 959
 960 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 961       const blink::WebTouchEvent& touch_event) {
 962   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 963
 964   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 965   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 966   input_router_->SendTouchEvent(touch_with_latency);
 967 }
 968
 969 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 970       const blink::WebTouchEvent& touch_event,
 971       const ui::LatencyInfo& ui_latency) {
 972   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 973
 974   // Always forward TouchEvents for touch stream consistency. They will be
 975   // ignored if appropriate in FilterInputEvent().
 976
 977   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 978   if (touch_emulator_ &&
 979       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 980     if (view_) {
 981       view_->ProcessAckedTouchEvent(
 982           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 983     }
 984     return;
 985   }
 986
 987   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 988   input_router_->SendTouchEvent(touch_with_latency);
 989 }
 990
 991 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 992     const NativeWebKeyboardEvent& key_event) {
 993   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 994   if (IgnoreInputEvents())
 995     return;
 996
 997   if (!process_->HasConnection())
 998     return;
 999
1000   // First, let keypress listeners take a shot at handling the event.  If a
1001   // listener handles the event, it should not be propagated to the renderer.
1002   if (KeyPressListenersHandleEvent(key_event)) {
1003     // Some keypresses that are accepted by the listener might have follow up
1004     // char events, which should be ignored.
1005     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1006       suppress_next_char_events_ = true;
1007     return;
1008   }
1009
1010   if (key_event.type == WebKeyboardEvent::Char &&
1011       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1012        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1013     OnUserGesture();
1014   }
1015
1016   // Double check the type to make sure caller hasn't sent us nonsense that
1017   // will mess up our key queue.
1018   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1019     return;
1020
1021   if (suppress_next_char_events_) {
1022     // If preceding RawKeyDown event was handled by the browser, then we need
1023     // suppress all Char events generated by it. Please note that, one
1024     // RawKeyDown event may generate multiple Char events, so we can't reset
1025     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1026     if (key_event.type == WebKeyboardEvent::Char)
1027       return;
1028     // We get a KeyUp or a RawKeyDown event.
1029     suppress_next_char_events_ = false;
1030   }
1031
1032   bool is_shortcut = false;
1033
1034   // Only pre-handle the key event if it's not handled by the input method.
1035   if (delegate_ && !key_event.skip_in_browser) {
1036     // We need to set |suppress_next_char_events_| to true if
1037     // PreHandleKeyboardEvent() returns true, but |this| may already be
1038     // destroyed at that time. So set |suppress_next_char_events_| true here,
1039     // then revert it afterwards when necessary.
1040     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1041       suppress_next_char_events_ = true;
1042
1043     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1044     // a hung/malicious renderer from interfering.
1045     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1046       return;
1047
1048     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1049       suppress_next_char_events_ = false;
1050   }
1051
1052   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1053     return;
1054
1055   NativeWebKeyboardEventWithLatencyInfo key_event_with_latency(key_event);
1056   latency_tracker_.OnInputEvent(key_event, &key_event_with_latency.latency);
1057   input_router_->SendKeyboardEvent(key_event_with_latency, is_shortcut);
1058 }
1059
1060 void RenderWidgetHostImpl::QueueSyntheticGesture(
1061     scoped_ptr<SyntheticGesture> synthetic_gesture,
1062     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1063   if (!synthetic_gesture_controller_ && view_) {
1064     synthetic_gesture_controller_.reset(
1065         new SyntheticGestureController(
1066             view_->CreateSyntheticGestureTarget().Pass()));
1067   }
1068   if (synthetic_gesture_controller_) {
1069     synthetic_gesture_controller_->QueueSyntheticGesture(
1070         synthetic_gesture.Pass(), on_complete);
1071   }
1072 }
1073
1074 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1075   if (!view_)
1076     return;
1077   view_->UpdateCursor(cursor);
1078 }
1079
1080 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1081   Send(new ViewMsg_ShowContextMenu(
1082       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1083 }
1084
1085 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1086   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1087 }
1088
1089 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1090   return latency_tracker_.latency_component_id();
1091 }
1092
1093 // static
1094 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1095   g_check_for_pending_resize_ack = false;
1096 }
1097
1098 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1099     const KeyPressEventCallback& callback) {
1100   key_press_event_callbacks_.push_back(callback);
1101 }
1102
1103 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1104     const KeyPressEventCallback& callback) {
1105   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1106     if (key_press_event_callbacks_[i].Equals(callback)) {
1107       key_press_event_callbacks_.erase(
1108           key_press_event_callbacks_.begin() + i);
1109       return;
1110     }
1111   }
1112 }
1113
1114 void RenderWidgetHostImpl::AddMouseEventCallback(
1115     const MouseEventCallback& callback) {
1116   mouse_event_callbacks_.push_back(callback);
1117 }
1118
1119 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1120     const MouseEventCallback& callback) {
1121   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1122     if (mouse_event_callbacks_[i].Equals(callback)) {
1123       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1124       return;
1125     }
1126   }
1127 }
1128
1129 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1130   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1131   if (view_)
1132     view_->GetScreenInfo(result);
1133   else
1134     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1135   // TODO(sievers): find a way to make this done another way so the method
1136   // can be const.
1137   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1138 }
1139
1140 const NativeWebKeyboardEvent*
1141     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1142   return input_router_->GetLastKeyboardEvent();
1143 }
1144
1145 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1146   if (delegate_)
1147     delegate_->ScreenInfoChanged();
1148
1149   // The resize message (which may not happen immediately) will carry with it
1150   // the screen info as well as the new size (if the screen has changed scale
1151   // factor).
1152   WasResized();
1153 }
1154
1155 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1156     const base::Callback<void(const unsigned char*,size_t)> callback) {
1157   int id = next_browser_snapshot_id_++;
1158   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1159   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1160 }
1161
1162 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1163                                               size_t offset,
1164                                               const gfx::Range& range) {
1165   if (view_)
1166     view_->SelectionChanged(text, offset, range);
1167 }
1168
1169 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1170     const ViewHostMsg_SelectionBounds_Params& params) {
1171   if (view_) {
1172     view_->SelectionBoundsChanged(params);
1173   }
1174 }
1175
1176 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1177                                                  base::TimeDelta interval) {
1178   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1179 }
1180
1181 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1182                                           int exit_code) {
1183   if (!renderer_initialized_)
1184     return;
1185
1186   // Clearing this flag causes us to re-create the renderer when recovering
1187   // from a crashed renderer.
1188   renderer_initialized_ = false;
1189
1190   waiting_for_screen_rects_ack_ = false;
1191
1192   // Must reset these to ensure that keyboard events work with a new renderer.
1193   suppress_next_char_events_ = false;
1194
1195   // Reset some fields in preparation for recovering from a crash.
1196   ResetSizeAndRepaintPendingFlags();
1197   current_size_.SetSize(0, 0);
1198   // After the renderer crashes, the view is destroyed and so the
1199   // RenderWidgetHost cannot track its visibility anymore. We assume such
1200   // RenderWidgetHost to be visible for the sake of internal accounting - be
1201   // careful about changing this - see http://crbug.com/401859.
1202   //
1203   // We need to at least make sure that the RenderProcessHost is notified about
1204   // the |is_hidden_| change, so that the renderer will have correct visibility
1205   // set when respawned.
1206   if (is_hidden_) {
1207     process_->WidgetRestored();
1208     is_hidden_ = false;
1209   }
1210
1211   // Reset this to ensure the hung renderer mechanism is working properly.
1212   in_flight_event_count_ = 0;
1213   StopHangMonitorTimeout();
1214
1215   if (view_) {
1216     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1217                                                gfx::GLSurfaceHandle());
1218     view_->RenderProcessGone(status, exit_code);
1219     view_ = NULL; // The View should be deleted by RenderProcessGone.
1220     view_weak_.reset();
1221   }
1222
1223   // Reconstruct the input router to ensure that it has fresh state for a new
1224   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1225   // event. (In particular, the above call to view_->RenderProcessGone will
1226   // destroy the aura window, which may dispatch a synthetic mouse move.)
1227   input_router_.reset(new InputRouterImpl(
1228       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1229
1230   synthetic_gesture_controller_.reset();
1231 }
1232
1233 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1234   text_direction_updated_ = true;
1235   text_direction_ = direction;
1236 }
1237
1238 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1239   if (text_direction_updated_)
1240     text_direction_canceled_ = true;
1241 }
1242
1243 void RenderWidgetHostImpl::NotifyTextDirection() {
1244   if (text_direction_updated_) {
1245     if (!text_direction_canceled_)
1246       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1247     text_direction_updated_ = false;
1248     text_direction_canceled_ = false;
1249   }
1250 }
1251
1252 void RenderWidgetHostImpl::ImeSetComposition(
1253     const base::string16& text,
1254     const std::vector<blink::WebCompositionUnderline>& underlines,
1255     int selection_start,
1256     int selection_end) {
1257   Send(new InputMsg_ImeSetComposition(
1258             GetRoutingID(), text, underlines, selection_start, selection_end));
1259 }
1260
1261 void RenderWidgetHostImpl::ImeConfirmComposition(
1262     const base::string16& text,
1263     const gfx::Range& replacement_range,
1264     bool keep_selection) {
1265   Send(new InputMsg_ImeConfirmComposition(
1266         GetRoutingID(), text, replacement_range, keep_selection));
1267 }
1268
1269 void RenderWidgetHostImpl::ImeCancelComposition() {
1270   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1271             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1272 }
1273
1274 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1275   return gfx::Rect();
1276 }
1277
1278 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1279                                               bool last_unlocked_by_target) {
1280   // Directly reject to lock the mouse. Subclass can override this method to
1281   // decide whether to allow mouse lock or not.
1282   GotResponseToLockMouseRequest(false);
1283 }
1284
1285 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1286   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1287   if (pending_mouse_lock_request_) {
1288     pending_mouse_lock_request_ = false;
1289     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1290   } else if (IsMouseLocked()) {
1291     view_->UnlockMouse();
1292   }
1293 }
1294
1295 bool RenderWidgetHostImpl::IsMouseLocked() const {
1296   return view_ ? view_->IsMouseLocked() : false;
1297 }
1298
1299 bool RenderWidgetHostImpl::IsFullscreenGranted() const {
1300   return false;
1301 }
1302
1303 blink::WebDisplayMode RenderWidgetHostImpl::GetDisplayMode() const {
1304   return blink::WebDisplayModeBrowser;
1305 }
1306
1307 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1308                                          const gfx::Size& min_size,
1309                                          const gfx::Size& max_size) {
1310   auto_resize_enabled_ = enable;
1311   min_size_for_auto_resize_ = min_size;
1312   max_size_for_auto_resize_ = max_size;
1313 }
1314
1315 void RenderWidgetHostImpl::Destroy() {
1316   NotificationService::current()->Notify(
1317       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1318       Source<RenderWidgetHost>(this),
1319       NotificationService::NoDetails());
1320
1321   // Tell the view to die.
1322   // Note that in the process of the view shutting down, it can call a ton
1323   // of other messages on us.  So if you do any other deinitialization here,
1324   // do it after this call to view_->Destroy().
1325   if (view_) {
1326     view_->Destroy();
1327     view_ = nullptr;
1328   }
1329
1330   delete this;
1331 }
1332
1333 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1334   NotificationService::current()->Notify(
1335       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1336       Source<RenderWidgetHost>(this),
1337       NotificationService::NoDetails());
1338   is_unresponsive_ = true;
1339   NotifyRendererUnresponsive();
1340 }
1341
1342 void RenderWidgetHostImpl::RendererIsResponsive() {
1343   if (is_unresponsive_) {
1344     is_unresponsive_ = false;
1345     NotifyRendererResponsive();
1346   }
1347 }
1348
1349 void RenderWidgetHostImpl::OnRenderViewReady() {
1350   SendScreenRects();
1351   WasResized();
1352 }
1353
1354 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1355   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1356   // it handles destruction.
1357   if (!owned_by_render_frame_host_) {
1358     // TODO(evanm): This synchronously ends up calling "delete this".
1359     // Is that really what we want in response to this message?  I'm matching
1360     // previous behavior of the code here.
1361     Destroy();
1362   } else {
1363     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1364   }
1365 }
1366
1367 void RenderWidgetHostImpl::OnClose() {
1368   Shutdown();
1369 }
1370
1371 void RenderWidgetHostImpl::OnSetTooltipText(
1372     const base::string16& tooltip_text,
1373     WebTextDirection text_direction_hint) {
1374   // First, add directionality marks around tooltip text if necessary.
1375   // A naive solution would be to simply always wrap the text. However, on
1376   // windows, Unicode directional embedding characters can't be displayed on
1377   // systems that lack RTL fonts and are instead displayed as empty squares.
1378   //
1379   // To get around this we only wrap the string when we deem it necessary i.e.
1380   // when the locale direction is different than the tooltip direction hint.
1381   //
1382   // Currently, we use element's directionality as the tooltip direction hint.
1383   // An alternate solution would be to set the overall directionality based on
1384   // trying to detect the directionality from the tooltip text rather than the
1385   // element direction.  One could argue that would be a preferable solution
1386   // but we use the current approach to match Fx & IE's behavior.
1387   base::string16 wrapped_tooltip_text = tooltip_text;
1388   if (!tooltip_text.empty()) {
1389     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1390       // Force the tooltip to have LTR directionality.
1391       wrapped_tooltip_text =
1392           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1393     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1394                !base::i18n::IsRTL()) {
1395       // Force the tooltip to have RTL directionality.
1396       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1397     }
1398   }
1399   if (GetView())
1400     view_->SetTooltipText(wrapped_tooltip_text);
1401 }
1402
1403 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1404   waiting_for_screen_rects_ack_ = false;
1405   if (!view_)
1406     return;
1407
1408   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1409       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1410     return;
1411   }
1412
1413   SendScreenRects();
1414 }
1415
1416 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1417   if (view_) {
1418     view_->SetBounds(pos);
1419     Send(new ViewMsg_Move_ACK(routing_id_));
1420   }
1421 }
1422
1423 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1424     const IPC::Message& message) {
1425   // This trace event is used in
1426   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1427   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1428   ViewHostMsg_SwapCompositorFrame::Param param;
1429   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1430     return false;
1431   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1432   uint32 output_surface_id = base::get<0>(param);
1433   base::get<1>(param).AssignTo(frame.get());
1434   std::vector<IPC::Message> messages_to_deliver_with_frame;
1435   messages_to_deliver_with_frame.swap(base::get<2>(param));
1436
1437   if (!ui::LatencyInfo::Verify(frame->metadata.latency_info,
1438                                "RenderWidgetHostImpl::OnSwapCompositorFrame"))
1439     return false;
1440
1441   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1442
1443   bool is_mobile_optimized = IsMobileOptimizedFrame(frame->metadata);
1444   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
1445   if (touch_emulator_)
1446     touch_emulator_->SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);
1447
1448   if (view_) {
1449     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1450     view_->DidReceiveRendererFrame();
1451   } else {
1452     cc::CompositorFrameAck ack;
1453     if (frame->gl_frame_data) {
1454       ack.gl_frame_data = frame->gl_frame_data.Pass();
1455       ack.gl_frame_data->sync_point = 0;
1456     } else if (frame->delegated_frame_data) {
1457       cc::TransferableResource::ReturnResources(
1458           frame->delegated_frame_data->resource_list,
1459           &ack.resources);
1460     }
1461     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1462                                process_->GetID(), ack);
1463   }
1464
1465   RenderProcessHost* rph = GetProcess();
1466   for (std::vector<IPC::Message>::const_iterator i =
1467            messages_to_deliver_with_frame.begin();
1468        i != messages_to_deliver_with_frame.end();
1469        ++i) {
1470     rph->OnMessageReceived(*i);
1471     if (i->dispatch_error())
1472       rph->OnBadMessageReceived(*i);
1473   }
1474   messages_to_deliver_with_frame.clear();
1475
1476   return true;
1477 }
1478
1479 void RenderWidgetHostImpl::OnUpdateRect(
1480     const ViewHostMsg_UpdateRect_Params& params) {
1481   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1482   TimeTicks paint_start = TimeTicks::Now();
1483
1484   // Update our knowledge of the RenderWidget's size.
1485   current_size_ = params.view_size;
1486
1487   bool is_resize_ack =
1488       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1489
1490   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1491   // that will end up reaching GetBackingStore.
1492   if (is_resize_ack) {
1493     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1494     resize_ack_pending_ = false;
1495   }
1496
1497   bool is_repaint_ack =
1498       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1499   if (is_repaint_ack) {
1500     DCHECK(repaint_ack_pending_);
1501     TRACE_EVENT_ASYNC_END0(
1502         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1503     repaint_ack_pending_ = false;
1504     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1505     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1506   }
1507
1508   DCHECK(!params.view_size.IsEmpty());
1509
1510   DidUpdateBackingStore(params, paint_start);
1511
1512   if (auto_resize_enabled_) {
1513     bool post_callback = new_auto_size_.IsEmpty();
1514     new_auto_size_ = params.view_size;
1515     if (post_callback) {
1516       base::ThreadTaskRunnerHandle::Get()->PostTask(
1517           FROM_HERE, base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1518                                 weak_factory_.GetWeakPtr()));
1519     }
1520   }
1521
1522   // Log the time delta for processing a paint message. On platforms that don't
1523   // support asynchronous painting, this is equivalent to
1524   // MPArch.RWH_TotalPaintTime.
1525   TimeDelta delta = TimeTicks::Now() - paint_start;
1526   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1527 }
1528
1529 void RenderWidgetHostImpl::DidUpdateBackingStore(
1530     const ViewHostMsg_UpdateRect_Params& params,
1531     const TimeTicks& paint_start) {
1532   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1533   TimeTicks update_start = TimeTicks::Now();
1534
1535   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1536   // will not be re-issued, so must move them now, regardless of whether we
1537   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1538   // in the process could dispatch other window messages which could cause the
1539   // view to be destroyed.
1540   if (view_)
1541     view_->MovePluginWindows(params.plugin_window_moves);
1542
1543   NotificationService::current()->Notify(
1544       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1545       Source<RenderWidgetHost>(this),
1546       NotificationService::NoDetails());
1547
1548   // We don't need to update the view if the view is hidden. We must do this
1549   // early return after the ACK is sent, however, or the renderer will not send
1550   // us more data.
1551   if (is_hidden_)
1552     return;
1553
1554   // If we got a resize ack, then perhaps we have another resize to send?
1555   bool is_resize_ack =
1556       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1557   if (is_resize_ack)
1558     WasResized();
1559
1560   // Log the time delta for processing a paint message.
1561   TimeTicks now = TimeTicks::Now();
1562   TimeDelta delta = now - update_start;
1563   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1564 }
1565
1566 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1567     const SyntheticGesturePacket& gesture_packet) {
1568   // Only allow untrustworthy gestures if explicitly enabled.
1569   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1570           cc::switches::kEnableGpuBenchmarking)) {
1571     bad_message::ReceivedBadMessage(GetProcess(),
1572                                     bad_message::RWH_SYNTHETIC_GESTURE);
1573     return;
1574   }
1575
1576   QueueSyntheticGesture(
1577         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1578         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1579                    weak_factory_.GetWeakPtr()));
1580 }
1581
1582 void RenderWidgetHostImpl::OnFocus() {
1583   // Only RenderViewHost can deal with that message.
1584   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1585 }
1586
1587 void RenderWidgetHostImpl::OnBlur() {
1588   // Only RenderViewHost can deal with that message.
1589   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1590 }
1591
1592 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1593   SetCursor(cursor);
1594 }
1595
1596 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1597     bool enabled, ui::GestureProviderConfigType config_type) {
1598   if (enabled) {
1599     if (!touch_emulator_) {
1600       touch_emulator_.reset(new TouchEmulator(
1601           this, view_ ? content::GetScaleFactorForView(view_) : 1.0f));
1602     }
1603     touch_emulator_->Enable(config_type);
1604   } else {
1605     if (touch_emulator_)
1606       touch_emulator_->Disable();
1607   }
1608 }
1609
1610 void RenderWidgetHostImpl::OnTextInputStateChanged(
1611     const ViewHostMsg_TextInputState_Params& params) {
1612   if (view_)
1613     view_->TextInputStateChanged(params);
1614 }
1615
1616 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1617     const gfx::Range& range,
1618     const std::vector<gfx::Rect>& character_bounds) {
1619   if (view_)
1620     view_->ImeCompositionRangeChanged(range, character_bounds);
1621 }
1622
1623 void RenderWidgetHostImpl::OnImeCancelComposition() {
1624   if (view_)
1625     view_->ImeCancelComposition();
1626 }
1627
1628 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1629                                        bool last_unlocked_by_target,
1630                                        bool privileged) {
1631
1632   if (pending_mouse_lock_request_) {
1633     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1634     return;
1635   } else if (IsMouseLocked()) {
1636     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1637     return;
1638   }
1639
1640   pending_mouse_lock_request_ = true;
1641   if (privileged && allow_privileged_mouse_lock_) {
1642     // Directly approve to lock the mouse.
1643     GotResponseToLockMouseRequest(true);
1644   } else {
1645     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1646   }
1647 }
1648
1649 void RenderWidgetHostImpl::OnUnlockMouse() {
1650   RejectMouseLockOrUnlockIfNecessary();
1651 }
1652
1653 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1654     const gfx::Rect& rect_pixels,
1655     const gfx::Size& size,
1656     const cc::SharedBitmapId& id) {
1657   DCHECK(!rect_pixels.IsEmpty());
1658   DCHECK(!size.IsEmpty());
1659
1660   scoped_ptr<cc::SharedBitmap> bitmap =
1661       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1662   if (!bitmap) {
1663     bad_message::ReceivedBadMessage(GetProcess(),
1664                                     bad_message::RWH_SHARED_BITMAP);
1665     return;
1666   }
1667
1668   DCHECK(bitmap->pixels());
1669
1670   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1671   SkBitmap zoomed_bitmap;
1672   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1673
1674   // Note that |rect| is in coordinates of pixels relative to the window origin.
1675   // Aura-based systems will want to convert this to DIPs.
1676   if (view_)
1677     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1678
1679   // It is assumed that the disambiguation popup will make a copy of the
1680   // provided zoomed image, so we delete this one.
1681   zoomed_bitmap.setPixels(0);
1682   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1683 }
1684
1685 #if defined(OS_WIN)
1686 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1687     gfx::NativeViewId dummy_activation_window) {
1688   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1689
1690   // This may happen as a result of a race condition when the plugin is going
1691   // away.
1692   wchar_t window_title[MAX_PATH + 1] = {0};
1693   if (!IsWindow(hwnd) ||
1694       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1695       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1696     return;
1697   }
1698
1699 #if defined(USE_AURA)
1700   SetParent(hwnd,
1701             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1702 #else
1703   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1704 #endif
1705   dummy_windows_for_activation_.push_back(hwnd);
1706 }
1707
1708 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1709     gfx::NativeViewId dummy_activation_window) {
1710   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1711   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1712   for (; i != dummy_windows_for_activation_.end(); ++i) {
1713     if ((*i) == hwnd) {
1714       dummy_windows_for_activation_.erase(i);
1715       return;
1716     }
1717   }
1718   NOTREACHED() << "Unknown dummy window";
1719 }
1720 #endif
1721
1722 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1723   ignore_input_events_ = ignore_input_events;
1724 }
1725
1726 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1727     const NativeWebKeyboardEvent& event) {
1728   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1729     return false;
1730
1731   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1732     size_t original_size = key_press_event_callbacks_.size();
1733     if (key_press_event_callbacks_[i].Run(event))
1734       return true;
1735
1736     // Check whether the callback that just ran removed itself, in which case
1737     // the iterator needs to be decremented to properly account for the removal.
1738     size_t current_size = key_press_event_callbacks_.size();
1739     if (current_size != original_size) {
1740       DCHECK_EQ(original_size - 1, current_size);
1741       --i;
1742     }
1743   }
1744
1745   return false;
1746 }
1747
1748 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1749     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1750   // Don't ignore touch cancel events, since they may be sent while input
1751   // events are being ignored in order to keep the renderer from getting
1752   // confused about how many touches are active.
1753   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1754     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1755
1756   if (!process_->HasConnection())
1757     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1758
1759   if (event.type == WebInputEvent::MouseDown ||
1760       event.type == WebInputEvent::GestureTapDown) {
1761     OnUserGesture();
1762   }
1763
1764   return view_ ? view_->FilterInputEvent(event)
1765                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1766 }
1767
1768 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1769   increment_in_flight_event_count();
1770   if (!is_hidden_)
1771     StartHangMonitorTimeout(hung_renderer_delay_);
1772 }
1773
1774 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1775   if (decrement_in_flight_event_count() <= 0) {
1776     // Cancel pending hung renderer checks since the renderer is responsive.
1777     StopHangMonitorTimeout();
1778   } else {
1779     // The renderer is responsive, but there are in-flight events to wait for.
1780     if (!is_hidden_)
1781       RestartHangMonitorTimeout();
1782   }
1783 }
1784
1785 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1786   has_touch_handler_ = has_handlers;
1787 }
1788
1789 void RenderWidgetHostImpl::DidFlush() {
1790   if (synthetic_gesture_controller_)
1791     synthetic_gesture_controller_->OnDidFlushInput();
1792 }
1793
1794 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1795   if (view_)
1796     view_->DidOverscroll(params);
1797 }
1798
1799 void RenderWidgetHostImpl::DidStopFlinging() {
1800   if (view_)
1801     view_->DidStopFlinging();
1802 }
1803
1804 void RenderWidgetHostImpl::OnKeyboardEventAck(
1805       const NativeWebKeyboardEventWithLatencyInfo& event,
1806       InputEventAckState ack_result) {
1807   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1808
1809 #if defined(OS_MACOSX)
1810   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event.event))
1811     return;
1812 #endif
1813
1814   // We only send unprocessed key event upwards if we are not hidden,
1815   // because the user has moved away from us and no longer expect any effect
1816   // of this key event.
1817   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1818   if (delegate_ && !processed && !is_hidden() && !event.event.skip_in_browser) {
1819     delegate_->HandleKeyboardEvent(event.event);
1820
1821     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1822     // (i.e.  in the case of Ctrl+W, where the call to
1823     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1824   }
1825 }
1826
1827 void RenderWidgetHostImpl::OnMouseEventAck(
1828     const MouseEventWithLatencyInfo& mouse_event,
1829     InputEventAckState ack_result) {
1830   latency_tracker_.OnInputEventAck(mouse_event.event, &mouse_event.latency);
1831 }
1832
1833 void RenderWidgetHostImpl::OnWheelEventAck(
1834     const MouseWheelEventWithLatencyInfo& wheel_event,
1835     InputEventAckState ack_result) {
1836   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1837
1838   if (!is_hidden() && view_) {
1839     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1840         delegate_->HandleWheelEvent(wheel_event.event)) {
1841       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1842     }
1843     view_->WheelEventAck(wheel_event.event, ack_result);
1844   }
1845 }
1846
1847 void RenderWidgetHostImpl::OnGestureEventAck(
1848     const GestureEventWithLatencyInfo& event,
1849     InputEventAckState ack_result) {
1850   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1851
1852   if (view_)
1853     view_->GestureEventAck(event.event, ack_result);
1854 }
1855
1856 void RenderWidgetHostImpl::OnTouchEventAck(
1857     const TouchEventWithLatencyInfo& event,
1858     InputEventAckState ack_result) {
1859   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1860
1861   if (touch_emulator_ &&
1862       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1863     return;
1864   }
1865
1866   if (view_)
1867     view_->ProcessAckedTouchEvent(event, ack_result);
1868 }
1869
1870 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1871   if (type == BAD_ACK_MESSAGE) {
1872     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1873   } else if (type == UNEXPECTED_EVENT_TYPE) {
1874     suppress_next_char_events_ = false;
1875   }
1876 }
1877
1878 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1879     SyntheticGesture::Result result) {
1880   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1881 }
1882
1883 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1884   return ignore_input_events_ || process_->IgnoreInputEvents();
1885 }
1886
1887 void RenderWidgetHostImpl::StartUserGesture() {
1888   OnUserGesture();
1889 }
1890
1891 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1892   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1893 }
1894
1895 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1896     const std::vector<EditCommand>& commands) {
1897   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1898 }
1899
1900 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1901                                               const std::string& value) {
1902   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1903 }
1904
1905 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1906     const gfx::Rect& rect) {
1907   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1908 }
1909
1910 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1911   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1912 }
1913
1914 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1915   if (!allowed) {
1916     RejectMouseLockOrUnlockIfNecessary();
1917     return false;
1918   } else {
1919     if (!pending_mouse_lock_request_) {
1920       // This is possible, e.g., the plugin sends us an unlock request before
1921       // the user allows to lock to mouse.
1922       return false;
1923     }
1924
1925     pending_mouse_lock_request_ = false;
1926     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1927       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1928       return false;
1929     } else {
1930       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1931       return true;
1932     }
1933   }
1934 }
1935
1936 // static
1937 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1938     int32 route_id,
1939     uint32 output_surface_id,
1940     int renderer_host_id,
1941     const cc::CompositorFrameAck& ack) {
1942   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1943   if (!host)
1944     return;
1945   host->Send(new ViewMsg_SwapCompositorFrameAck(
1946       route_id, output_surface_id, ack));
1947 }
1948
1949 // static
1950 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1951     int32 route_id,
1952     uint32 output_surface_id,
1953     int renderer_host_id,
1954     const cc::CompositorFrameAck& ack) {
1955   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1956   if (!host)
1957     return;
1958   host->Send(
1959       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1960 }
1961
1962 void RenderWidgetHostImpl::DelayedAutoResized() {
1963   gfx::Size new_size = new_auto_size_;
1964   // Clear the new_auto_size_ since the empty value is used as a flag to
1965   // indicate that no callback is in progress (i.e. without this line
1966   // DelayedAutoResized will not get called again).
1967   new_auto_size_.SetSize(0, 0);
1968   if (!auto_resize_enabled_)
1969     return;
1970
1971   OnRenderAutoResized(new_size);
1972 }
1973
1974 void RenderWidgetHostImpl::DetachDelegate() {
1975   delegate_ = NULL;
1976 }
1977
1978 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1979   ui::LatencyInfo::LatencyComponent window_snapshot_component;
1980   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1981                                GetLatencyComponentId(),
1982                                &window_snapshot_component)) {
1983     int sequence_number = static_cast<int>(
1984         window_snapshot_component.sequence_number);
1985 #if defined(OS_MACOSX)
1986     // On Mac, when using CoreAnmation, there is a delay between when content
1987     // is drawn to the screen, and when the snapshot will actually pick up
1988     // that content. Insert a manual delay of 1/6th of a second (to simulate
1989     // 10 frames at 60 fps) before actually taking the snapshot.
1990     base::MessageLoop::current()->PostDelayedTask(
1991         FROM_HERE,
1992         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
1993                    weak_factory_.GetWeakPtr(),
1994                    sequence_number),
1995         base::TimeDelta::FromSecondsD(1. / 6));
1996 #else
1997     WindowSnapshotReachedScreen(sequence_number);
1998 #endif
1999   }
2000
2001   latency_tracker_.OnFrameSwapped(latency_info);
2002 }
2003
2004 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2005   view_->DidReceiveRendererFrame();
2006 }
2007
2008 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2009   DCHECK(base::MessageLoopForUI::IsCurrent());
2010
2011   gfx::Rect view_bounds = GetView()->GetViewBounds();
2012   gfx::Rect snapshot_bounds(view_bounds.size());
2013
2014   std::vector<unsigned char> png;
2015   if (ui::GrabViewSnapshot(
2016       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2017     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2018     return;
2019   }
2020
2021   ui::GrabViewSnapshotAsync(
2022       GetView()->GetNativeView(),
2023       snapshot_bounds,
2024       base::ThreadTaskRunnerHandle::Get(),
2025       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2026                  weak_factory_.GetWeakPtr(),
2027                  snapshot_id));
2028 }
2029
2030 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2031                                                   const unsigned char* data,
2032                                                   size_t size) {
2033   // Any pending snapshots with a lower ID than the one received are considered
2034   // to be implicitly complete, and returned the same snapshot data.
2035   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2036   while(it != pending_browser_snapshots_.end()) {
2037       if (it->first <= snapshot_id) {
2038         it->second.Run(data, size);
2039         pending_browser_snapshots_.erase(it++);
2040       } else {
2041         ++it;
2042       }
2043   }
2044 }
2045
2046 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2047     int snapshot_id,
2048     scoped_refptr<base::RefCountedBytes> png_data) {
2049   if (png_data.get())
2050     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2051   else
2052     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2053 }
2054
2055 // static
2056 void RenderWidgetHostImpl::CompositorFrameDrawn(
2057     const std::vector<ui::LatencyInfo>& latency_info) {
2058   for (size_t i = 0; i < latency_info.size(); i++) {
2059     std::set<RenderWidgetHostImpl*> rwhi_set;
2060     for (const auto& lc : latency_info[i].latency_components()) {
2061       if (lc.first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2062           lc.first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2063           lc.first.first == ui::TAB_SHOW_COMPONENT) {
2064         // Matches with GetLatencyComponentId
2065         int routing_id = lc.first.second & 0xffffffff;
2066         int process_id = (lc.first.second >> 32) & 0xffffffff;
2067         RenderWidgetHost* rwh =
2068             RenderWidgetHost::FromID(process_id, routing_id);
2069         if (!rwh) {
2070           continue;
2071         }
2072         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2073         if (rwhi_set.insert(rwhi).second)
2074           rwhi->FrameSwapped(latency_info[i]);
2075       }
2076     }
2077   }
2078 }
2079
2080 BrowserAccessibilityManager*
2081     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2082   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2083 }
2084
2085 BrowserAccessibilityManager*
2086     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2087   return delegate_ ?
2088       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2089 }
2090
2091 #if defined(OS_WIN)
2092 gfx::NativeViewAccessible
2093     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2094   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2095 }
2096 #endif
2097
2098 }  // namespace content