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       input_method_active_(false),
 166       text_direction_updated_(false),
 167       text_direction_(blink::WebTextDirectionLeftToRight),
 168       text_direction_canceled_(false),
 169       suppress_next_char_events_(false),
 170       pending_mouse_lock_request_(false),
 171       allow_privileged_mouse_lock_(false),
 172       has_touch_handler_(false),
 173       next_browser_snapshot_id_(1),
 174       owned_by_render_frame_host_(false),
 175       is_focused_(false),
 176       weak_factory_(this) {
 177   CHECK(delegate_);
 178   if (routing_id_ == MSG_ROUTING_NONE) {
 179     routing_id_ = process_->GetNextRoutingID();
 180     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 181         process_->GetID(),
 182         routing_id_);
 183   } else {
 184     // TODO(piman): This is a O(N) lookup, where we could forward the
 185     // information from the RenderWidgetHelper. The problem is that doing so
 186     // currently leaks outside of content all the way to chrome classes, and
 187     // would be a layering violation. Since we don't expect more than a few
 188     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 189     // problem, for example by tracking in the RenderWidgetHelper the routing id
 190     // (and surface id) that have been created, but whose RWH haven't yet.
 191     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 192         process_->GetID(),
 193         routing_id_);
 194     DCHECK(surface_id_);
 195   }
 196
 197   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 198       g_routing_id_widget_map.Get().insert(std::make_pair(
 199           RenderWidgetHostID(process->GetID(), routing_id_), this));
 200   CHECK(result.second) << "Inserting a duplicate item!";
 201   process_->AddRoute(routing_id_, this);
 202
 203   // If we're initially visible, tell the process host that we're alive.
 204   // Otherwise we'll notify the process host when we are first shown.
 205   if (!hidden)
 206     process_->WidgetRestored();
 207
 208   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 209
 210   input_router_.reset(new InputRouterImpl(
 211       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 212
 213   touch_emulator_.reset();
 214
 215   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 216       IsRenderView() ? RenderViewHost::From(this) : NULL);
 217   if (BrowserPluginGuest::IsGuest(rvh) ||
 218       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 219           switches::kDisableHangMonitor)) {
 220     hang_monitor_timeout_.reset(new TimeoutMonitor(
 221         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 222                    weak_factory_.GetWeakPtr())));
 223   }
 224 }
 225
 226 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 227   if (view_weak_)
 228     view_weak_->RenderWidgetHostGone();
 229   SetView(NULL);
 230
 231   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 232   surface_id_ = 0;
 233
 234   process_->RemoveRoute(routing_id_);
 235   g_routing_id_widget_map.Get().erase(
 236       RenderWidgetHostID(process_->GetID(), routing_id_));
 237
 238   if (delegate_)
 239     delegate_->RenderWidgetDeleted(this);
 240 }
 241
 242 // static
 243 RenderWidgetHost* RenderWidgetHost::FromID(
 244     int32 process_id,
 245     int32 routing_id) {
 246   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 247 }
 248
 249 // static
 250 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 251     int32 process_id,
 252     int32 routing_id) {
 253   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 254   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 255   RoutingIDWidgetMap::iterator it = widgets->find(
 256       RenderWidgetHostID(process_id, routing_id));
 257   return it == widgets->end() ? NULL : it->second;
 258 }
 259
 260 // static
 261 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 262   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 263   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 264   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 265        it != widgets->end();
 266        ++it) {
 267     RenderWidgetHost* widget = it->second;
 268
 269     if (!widget->IsRenderView()) {
 270       hosts->Add(widget);
 271       continue;
 272     }
 273
 274     // Add only active RenderViewHosts.
 275     RenderViewHost* rvh = RenderViewHost::From(widget);
 276     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 277       hosts->Add(widget);
 278   }
 279
 280   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 281 }
 282
 283 // static
 284 scoped_ptr<RenderWidgetHostIterator>
 285 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 286   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 287   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 288   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 289        it != widgets->end();
 290        ++it) {
 291     hosts->Add(it->second);
 292   }
 293
 294   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 295 }
 296
 297 // static
 298 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 299   return rwh->AsRenderWidgetHostImpl();
 300 }
 301
 302 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 303   if (view)
 304     view_weak_ = view->GetWeakPtr();
 305   else
 306     view_weak_.reset();
 307   view_ = view;
 308
 309   // If the renderer has not yet been initialized, then the surface ID
 310   // namespace will be sent during initialization.
 311   if (view_ && renderer_initialized_) {
 312     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 313                                            view_->GetSurfaceIdNamespace()));
 314   }
 315
 316   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 317       surface_id_, GetCompositingSurface());
 318
 319   synthetic_gesture_controller_.reset();
 320 }
 321
 322 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 323   return process_;
 324 }
 325
 326 int RenderWidgetHostImpl::GetRoutingID() const {
 327   return routing_id_;
 328 }
 329
 330 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 331   return view_;
 332 }
 333
 334 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 335   return this;
 336 }
 337
 338 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 339   if (view_)
 340     return view_->GetNativeViewId();
 341   return 0;
 342 }
 343
 344 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 345   if (view_)
 346     return view_->GetCompositingSurface();
 347   return gfx::GLSurfaceHandle();
 348 }
 349
 350 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 351   resize_ack_pending_ = false;
 352   if (repaint_ack_pending_) {
 353     TRACE_EVENT_ASYNC_END0(
 354         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 355   }
 356   repaint_ack_pending_ = false;
 357   if (old_resize_params_)
 358     old_resize_params_->new_size = gfx::Size();
 359 }
 360
 361 void RenderWidgetHostImpl::SendScreenRects() {
 362   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 363     return;
 364
 365   if (is_hidden_) {
 366     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 367     // happens on Win & Mac, and when the view is shown it'll call this again.
 368     return;
 369   }
 370
 371   if (!view_)
 372     return;
 373
 374   last_view_screen_rect_ = view_->GetViewBounds();
 375   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 376   Send(new ViewMsg_UpdateScreenRects(
 377       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 378   if (delegate_)
 379     delegate_->DidSendScreenRects(this);
 380   waiting_for_screen_rects_ack_ = true;
 381 }
 382
 383 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 384   suppress_next_char_events_ = true;
 385 }
 386
 387 void RenderWidgetHostImpl::FlushInput() {
 388   input_router_->RequestNotificationWhenFlushed();
 389   if (synthetic_gesture_controller_)
 390     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 391 }
 392
 393 void RenderWidgetHostImpl::SetNeedsFlush() {
 394   if (view_)
 395     view_->OnSetNeedsFlushInput();
 396 }
 397
 398 void RenderWidgetHostImpl::Init() {
 399   DCHECK(process_->HasConnection());
 400
 401   renderer_initialized_ = true;
 402
 403   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 404       surface_id_, GetCompositingSurface());
 405
 406   // Send the ack along with the information on placement.
 407   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 408   GetProcess()->ResumeRequestsForView(routing_id_);
 409
 410   // If the RWHV has not yet been set, the surface ID namespace will get
 411   // passed down by the call to SetView().
 412   if (view_) {
 413     Send(new ViewMsg_SetSurfaceIdNamespace(routing_id_,
 414                                            view_->GetSurfaceIdNamespace()));
 415   }
 416
 417   WasResized();
 418 }
 419
 420 void RenderWidgetHostImpl::InitForFrame() {
 421   DCHECK(process_->HasConnection());
 422   renderer_initialized_ = true;
 423 }
 424
 425 void RenderWidgetHostImpl::Shutdown() {
 426   RejectMouseLockOrUnlockIfNecessary();
 427
 428   if (process_->HasConnection()) {
 429     // Tell the renderer object to close.
 430     bool rv = Send(new ViewMsg_Close(routing_id_));
 431     DCHECK(rv);
 432   }
 433
 434   Destroy();
 435 }
 436
 437 bool RenderWidgetHostImpl::IsLoading() const {
 438   return is_loading_;
 439 }
 440
 441 bool RenderWidgetHostImpl::IsRenderView() const {
 442   return false;
 443 }
 444
 445 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 446   bool handled = true;
 447   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 448     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 449     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 450                         OnQueueSyntheticGesture)
 451     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 452                         OnImeCancelComposition)
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 456                         OnUpdateScreenRectsAck)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 459     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 460                                 OnSwapCompositorFrame(msg))
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 462     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 466                         OnTextInputTypeChanged)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 469     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 470                         OnShowDisambiguationPopup)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 472     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 473                         OnSelectionBoundsChanged)
 474 #if defined(OS_WIN)
 475     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 476                         OnWindowlessPluginDummyWindowCreated)
 477     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 478                         OnWindowlessPluginDummyWindowDestroyed)
 479 #endif
 480     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 481                         OnImeCompositionRangeChanged)
 482     IPC_MESSAGE_UNHANDLED(handled = false)
 483   IPC_END_MESSAGE_MAP()
 484
 485   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 486     return true;
 487
 488   if (!handled && view_ && view_->OnMessageReceived(msg))
 489     return true;
 490
 491   return handled;
 492 }
 493
 494 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 495   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 496     return input_router_->SendInput(make_scoped_ptr(msg));
 497
 498   return process_->Send(msg);
 499 }
 500
 501 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 502   is_loading_ = is_loading;
 503   if (!view_)
 504     return;
 505   view_->SetIsLoading(is_loading);
 506 }
 507
 508 void RenderWidgetHostImpl::WasHidden() {
 509   if (is_hidden_)
 510     return;
 511
 512   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasHidden");
 513   is_hidden_ = true;
 514
 515   // Don't bother reporting hung state when we aren't active.
 516   StopHangMonitorTimeout();
 517
 518   // If we have a renderer, then inform it that we are being hidden so it can
 519   // reduce its resource utilization.
 520   Send(new ViewMsg_WasHidden(routing_id_));
 521
 522   // Tell the RenderProcessHost we were hidden.
 523   process_->WidgetHidden();
 524
 525   bool is_visible = false;
 526   NotificationService::current()->Notify(
 527       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 528       Source<RenderWidgetHost>(this),
 529       Details<bool>(&is_visible));
 530 }
 531
 532 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 533   if (!is_hidden_)
 534     return;
 535
 536   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::WasShown");
 537   is_hidden_ = false;
 538
 539   SendScreenRects();
 540
 541   // When hidden, timeout monitoring for input events is disabled. Restore it
 542   // now to ensure consistent hang detection.
 543   if (in_flight_event_count_)
 544     RestartHangMonitorTimeout();
 545
 546   // Always repaint on restore.
 547   bool needs_repainting = true;
 548   needs_repainting_on_restore_ = false;
 549   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 550
 551   process_->WidgetRestored();
 552
 553   bool is_visible = true;
 554   NotificationService::current()->Notify(
 555       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 556       Source<RenderWidgetHost>(this),
 557       Details<bool>(&is_visible));
 558
 559   // It's possible for our size to be out of sync with the renderer. The
 560   // following is one case that leads to this:
 561   // 1. WasResized -> Send ViewMsg_Resize to render
 562   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 563   // 3. WasHidden
 564   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 565   //    is hidden. Now renderer/browser out of sync with what they think size
 566   //    is.
 567   // By invoking WasResized the renderer is updated as necessary. WasResized
 568   // does nothing if the sizes are already in sync.
 569   //
 570   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 571   // could handle both the restore and resize at once. This isn't that big a
 572   // deal as RenderWidget::WasShown delays updating, so that the resize from
 573   // WasResized is usually processed before the renderer is painted.
 574   WasResized();
 575 }
 576
 577 bool RenderWidgetHostImpl::GetResizeParams(
 578     ViewMsg_Resize_Params* resize_params) {
 579   *resize_params = ViewMsg_Resize_Params();
 580
 581   GetWebScreenInfo(&resize_params->screen_info);
 582   resize_params->resizer_rect = GetRootWindowResizerRect();
 583
 584   if (view_) {
 585     resize_params->new_size = view_->GetRequestedRendererSize();
 586     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 587     resize_params->top_controls_height = view_->GetTopControlsHeight();
 588     resize_params->top_controls_shrink_blink_size =
 589         view_->DoTopControlsShrinkBlinkSize();
 590     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 591     resize_params->is_fullscreen_granted = IsFullscreenGranted();
 592     resize_params->display_mode = GetDisplayMode();
 593   }
 594
 595   const bool size_changed =
 596       !old_resize_params_ ||
 597       old_resize_params_->new_size != resize_params->new_size ||
 598       (old_resize_params_->physical_backing_size.IsEmpty() &&
 599        !resize_params->physical_backing_size.IsEmpty());
 600   bool dirty = size_changed ||
 601       old_resize_params_->screen_info != resize_params->screen_info ||
 602       old_resize_params_->physical_backing_size !=
 603           resize_params->physical_backing_size ||
 604       old_resize_params_->is_fullscreen_granted !=
 605           resize_params->is_fullscreen_granted ||
 606       old_resize_params_->display_mode != resize_params->display_mode ||
 607       old_resize_params_->top_controls_height !=
 608           resize_params->top_controls_height ||
 609       old_resize_params_->top_controls_shrink_blink_size !=
 610           resize_params->top_controls_shrink_blink_size ||
 611       old_resize_params_->visible_viewport_size !=
 612           resize_params->visible_viewport_size;
 613
 614   // We don't expect to receive an ACK when the requested size or the physical
 615   // backing size is empty, or when the main viewport size didn't change.
 616   resize_params->needs_resize_ack =
 617       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 618       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 619
 620   return dirty;
 621 }
 622
 623 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 624     const ViewMsg_Resize_Params& resize_params) {
 625   resize_ack_pending_ = resize_params.needs_resize_ack;
 626
 627   old_resize_params_ =
 628       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 629 }
 630
 631 void RenderWidgetHostImpl::WasResized() {
 632   // Skip if the |delegate_| has already been detached because
 633   // it's web contents is being deleted.
 634   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 635       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 636     return;
 637   }
 638
 639   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 640   if (!GetResizeParams(params.get()))
 641     return;
 642
 643   bool width_changed =
 644       !old_resize_params_ ||
 645       old_resize_params_->new_size.width() != params->new_size.width();
 646   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 647     resize_ack_pending_ = params->needs_resize_ack;
 648     old_resize_params_.swap(params);
 649   }
 650
 651   if (delegate_)
 652     delegate_->RenderWidgetWasResized(this, width_changed);
 653 }
 654
 655 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 656   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 657 }
 658
 659 void RenderWidgetHostImpl::GotFocus() {
 660   Focus();
 661   if (delegate_)
 662     delegate_->RenderWidgetGotFocus(this);
 663 }
 664
 665 void RenderWidgetHostImpl::Focus() {
 666   is_focused_ = true;
 667
 668   Send(new InputMsg_SetFocus(routing_id_, true));
 669 }
 670
 671 void RenderWidgetHostImpl::Blur() {
 672   is_focused_ = false;
 673
 674   // If there is a pending mouse lock request, we don't want to reject it at
 675   // this point. The user can switch focus back to this view and approve the
 676   // request later.
 677   if (IsMouseLocked())
 678     view_->UnlockMouse();
 679
 680   if (touch_emulator_)
 681     touch_emulator_->CancelTouch();
 682
 683   Send(new InputMsg_SetFocus(routing_id_, false));
 684 }
 685
 686 void RenderWidgetHostImpl::LostCapture() {
 687   if (touch_emulator_)
 688     touch_emulator_->CancelTouch();
 689
 690   Send(new InputMsg_MouseCaptureLost(routing_id_));
 691 }
 692
 693 void RenderWidgetHostImpl::SetActive(bool active) {
 694   Send(new ViewMsg_SetActive(routing_id_, active));
 695 }
 696
 697 void RenderWidgetHostImpl::LostMouseLock() {
 698   Send(new ViewMsg_MouseLockLost(routing_id_));
 699 }
 700
 701 void RenderWidgetHostImpl::ViewDestroyed() {
 702   RejectMouseLockOrUnlockIfNecessary();
 703
 704   // TODO(evanm): tracking this may no longer be necessary;
 705   // eliminate this function if so.
 706   SetView(NULL);
 707 }
 708
 709 void RenderWidgetHostImpl::CopyFromBackingStore(
 710     const gfx::Rect& src_subrect,
 711     const gfx::Size& accelerated_dst_size,
 712     ReadbackRequestCallback& callback,
 713     const SkColorType preferred_color_type) {
 714   if (view_) {
 715     TRACE_EVENT0("browser",
 716         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 717     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 718         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 719     view_->CopyFromCompositingSurface(accelerated_copy_rect,
 720                                       accelerated_dst_size, callback,
 721                                       preferred_color_type);
 722     return;
 723   }
 724
 725   callback.Run(SkBitmap(), content::READBACK_FAILED);
 726 }
 727
 728 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 729   if (view_)
 730     return view_->IsSurfaceAvailableForCopy();
 731   return false;
 732 }
 733
 734 #if defined(OS_ANDROID)
 735 void RenderWidgetHostImpl::LockBackingStore() {
 736   if (view_)
 737     view_->LockCompositingSurface();
 738 }
 739
 740 void RenderWidgetHostImpl::UnlockBackingStore() {
 741   if (view_)
 742     view_->UnlockCompositingSurface();
 743 }
 744 #endif
 745
 746 #if defined(OS_MACOSX)
 747 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 748   TRACE_EVENT0("browser",
 749       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 750
 751   if (!CanPauseForPendingResizeOrRepaints())
 752     return;
 753
 754   WaitForSurface();
 755 }
 756
 757 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 758   // Do not pause if the view is hidden.
 759   if (is_hidden())
 760     return false;
 761
 762   // Do not pause if there is not a paint or resize already coming.
 763   if (!repaint_ack_pending_ && !resize_ack_pending_)
 764     return false;
 765
 766   return true;
 767 }
 768
 769 void RenderWidgetHostImpl::WaitForSurface() {
 770   // How long to (synchronously) wait for the renderer to respond with a
 771   // new frame when our current frame doesn't exist or is the wrong size.
 772   // This timeout impacts the "choppiness" of our window resize.
 773   const int kPaintMsgTimeoutMS = 50;
 774
 775   if (!view_)
 776     return;
 777
 778   // The view_size will be current_size_ for auto-sized views and otherwise the
 779   // size of the view_. (For auto-sized views, current_size_ is updated during
 780   // UpdateRect messages.)
 781   gfx::Size view_size = current_size_;
 782   if (!auto_resize_enabled_) {
 783     // Get the desired size from the current view bounds.
 784     gfx::Rect view_rect = view_->GetViewBounds();
 785     if (view_rect.IsEmpty())
 786       return;
 787     view_size = view_rect.size();
 788   }
 789
 790   TRACE_EVENT2("renderer_host",
 791                "RenderWidgetHostImpl::WaitForSurface",
 792                "width",
 793                base::IntToString(view_size.width()),
 794                "height",
 795                base::IntToString(view_size.height()));
 796
 797   // We should not be asked to paint while we are hidden.  If we are hidden,
 798   // then it means that our consumer failed to call WasShown.
 799   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 800
 801   // We should never be called recursively; this can theoretically lead to
 802   // infinite recursion and almost certainly leads to lower performance.
 803   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 804   base::AutoReset<bool> auto_reset_in_get_backing_store(
 805       &in_get_backing_store_, true);
 806
 807   // We might have a surface that we can use already.
 808   if (view_->HasAcceleratedSurface(view_size))
 809     return;
 810
 811   // Request that the renderer produce a frame of the right size, if it
 812   // hasn't been requested already.
 813   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 814     repaint_start_time_ = TimeTicks::Now();
 815     repaint_ack_pending_ = true;
 816     TRACE_EVENT_ASYNC_BEGIN0(
 817         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 818     Send(new ViewMsg_Repaint(routing_id_, view_size));
 819   }
 820
 821   // Pump a nested message loop until we time out or get a frame of the right
 822   // size.
 823   TimeTicks start_time = TimeTicks::Now();
 824   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 825   TimeTicks timeout_time = start_time + time_left;
 826   while (1) {
 827     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 828     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 829       // For auto-resized views, current_size_ determines the view_size and it
 830       // may have changed during the handling of an UpdateRect message.
 831       if (auto_resize_enabled_)
 832         view_size = current_size_;
 833       if (view_->HasAcceleratedSurface(view_size))
 834         break;
 835     }
 836     time_left = timeout_time - TimeTicks::Now();
 837     if (time_left <= TimeDelta::FromSeconds(0)) {
 838       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 839       break;
 840     }
 841   }
 842
 843   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 844                              TimeTicks::Now() - start_time,
 845                              TimeDelta::FromMilliseconds(1),
 846                              TimeDelta::FromMilliseconds(200), 50);
 847 }
 848 #endif
 849
 850 bool RenderWidgetHostImpl::ScheduleComposite() {
 851   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 852       resize_ack_pending_) {
 853     return false;
 854   }
 855
 856   // Send out a request to the renderer to paint the view if required.
 857   repaint_start_time_ = TimeTicks::Now();
 858   repaint_ack_pending_ = true;
 859   TRACE_EVENT_ASYNC_BEGIN0(
 860       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 861   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 862   return true;
 863 }
 864
 865 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 866   if (hang_monitor_timeout_)
 867     hang_monitor_timeout_->Start(delay);
 868 }
 869
 870 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 871   if (hang_monitor_timeout_)
 872     hang_monitor_timeout_->Restart(hung_renderer_delay_);
 873 }
 874
 875 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 876   if (hang_monitor_timeout_)
 877     hang_monitor_timeout_->Stop();
 878   RendererIsResponsive();
 879 }
 880
 881 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 882   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 883 }
 884
 885 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 886       const blink::WebMouseEvent& mouse_event,
 887       const ui::LatencyInfo& ui_latency) {
 888   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 889                "x", mouse_event.x, "y", mouse_event.y);
 890
 891   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 892     if (mouse_event_callbacks_[i].Run(mouse_event))
 893       return;
 894   }
 895
 896   if (IgnoreInputEvents())
 897     return;
 898
 899   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 900     return;
 901
 902   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 903   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 904   input_router_->SendMouseEvent(mouse_with_latency);
 905
 906   // Pass mouse state to gpu service if the subscribe uniform
 907   // extension is enabled.
 908   if (process_->SubscribeUniformEnabled()) {
 909     gpu::ValueState state;
 910     state.int_value[0] = mouse_event.x;
 911     state.int_value[1] = mouse_event.y;
 912     // TODO(orglofch) Separate the mapping of pending value states to the
 913     // Gpu Service to be per RWH not per process
 914     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 915   }
 916 }
 917
 918 void RenderWidgetHostImpl::ForwardWheelEvent(
 919     const WebMouseWheelEvent& wheel_event) {
 920   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 921 }
 922
 923 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 924       const blink::WebMouseWheelEvent& wheel_event,
 925       const ui::LatencyInfo& ui_latency) {
 926   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 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   ui::LatencyInfo latency;
1056   latency_tracker_.OnInputEvent(key_event, &latency);
1057   input_router_->SendKeyboardEvent(key_event, 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::SetInputMethodActive(bool activate) {
1253   input_method_active_ = activate;
1254   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1255 }
1256
1257 void RenderWidgetHostImpl::ImeSetComposition(
1258     const base::string16& text,
1259     const std::vector<blink::WebCompositionUnderline>& underlines,
1260     int selection_start,
1261     int selection_end) {
1262   Send(new InputMsg_ImeSetComposition(
1263             GetRoutingID(), text, underlines, selection_start, selection_end));
1264 }
1265
1266 void RenderWidgetHostImpl::ImeConfirmComposition(
1267     const base::string16& text,
1268     const gfx::Range& replacement_range,
1269     bool keep_selection) {
1270   Send(new InputMsg_ImeConfirmComposition(
1271         GetRoutingID(), text, replacement_range, keep_selection));
1272 }
1273
1274 void RenderWidgetHostImpl::ImeCancelComposition() {
1275   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1276             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1277 }
1278
1279 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1280   return gfx::Rect();
1281 }
1282
1283 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1284                                               bool last_unlocked_by_target) {
1285   // Directly reject to lock the mouse. Subclass can override this method to
1286   // decide whether to allow mouse lock or not.
1287   GotResponseToLockMouseRequest(false);
1288 }
1289
1290 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1291   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1292   if (pending_mouse_lock_request_) {
1293     pending_mouse_lock_request_ = false;
1294     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1295   } else if (IsMouseLocked()) {
1296     view_->UnlockMouse();
1297   }
1298 }
1299
1300 bool RenderWidgetHostImpl::IsMouseLocked() const {
1301   return view_ ? view_->IsMouseLocked() : false;
1302 }
1303
1304 bool RenderWidgetHostImpl::IsFullscreenGranted() const {
1305   return false;
1306 }
1307
1308 blink::WebDisplayMode RenderWidgetHostImpl::GetDisplayMode() const {
1309   return blink::WebDisplayModeBrowser;
1310 }
1311
1312 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1313                                          const gfx::Size& min_size,
1314                                          const gfx::Size& max_size) {
1315   auto_resize_enabled_ = enable;
1316   min_size_for_auto_resize_ = min_size;
1317   max_size_for_auto_resize_ = max_size;
1318 }
1319
1320 void RenderWidgetHostImpl::Destroy() {
1321   NotificationService::current()->Notify(
1322       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1323       Source<RenderWidgetHost>(this),
1324       NotificationService::NoDetails());
1325
1326   // Tell the view to die.
1327   // Note that in the process of the view shutting down, it can call a ton
1328   // of other messages on us.  So if you do any other deinitialization here,
1329   // do it after this call to view_->Destroy().
1330   if (view_) {
1331     view_->Destroy();
1332     view_ = nullptr;
1333   }
1334
1335   delete this;
1336 }
1337
1338 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1339   NotificationService::current()->Notify(
1340       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1341       Source<RenderWidgetHost>(this),
1342       NotificationService::NoDetails());
1343   is_unresponsive_ = true;
1344   NotifyRendererUnresponsive();
1345 }
1346
1347 void RenderWidgetHostImpl::RendererIsResponsive() {
1348   if (is_unresponsive_) {
1349     is_unresponsive_ = false;
1350     NotifyRendererResponsive();
1351   }
1352 }
1353
1354 void RenderWidgetHostImpl::OnRenderViewReady() {
1355   SendScreenRects();
1356   WasResized();
1357 }
1358
1359 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1360   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1361   // it handles destruction.
1362   if (!owned_by_render_frame_host_) {
1363     // TODO(evanm): This synchronously ends up calling "delete this".
1364     // Is that really what we want in response to this message?  I'm matching
1365     // previous behavior of the code here.
1366     Destroy();
1367   } else {
1368     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1369   }
1370 }
1371
1372 void RenderWidgetHostImpl::OnClose() {
1373   Shutdown();
1374 }
1375
1376 void RenderWidgetHostImpl::OnSetTooltipText(
1377     const base::string16& tooltip_text,
1378     WebTextDirection text_direction_hint) {
1379   // First, add directionality marks around tooltip text if necessary.
1380   // A naive solution would be to simply always wrap the text. However, on
1381   // windows, Unicode directional embedding characters can't be displayed on
1382   // systems that lack RTL fonts and are instead displayed as empty squares.
1383   //
1384   // To get around this we only wrap the string when we deem it necessary i.e.
1385   // when the locale direction is different than the tooltip direction hint.
1386   //
1387   // Currently, we use element's directionality as the tooltip direction hint.
1388   // An alternate solution would be to set the overall directionality based on
1389   // trying to detect the directionality from the tooltip text rather than the
1390   // element direction.  One could argue that would be a preferable solution
1391   // but we use the current approach to match Fx & IE's behavior.
1392   base::string16 wrapped_tooltip_text = tooltip_text;
1393   if (!tooltip_text.empty()) {
1394     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1395       // Force the tooltip to have LTR directionality.
1396       wrapped_tooltip_text =
1397           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1398     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1399                !base::i18n::IsRTL()) {
1400       // Force the tooltip to have RTL directionality.
1401       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1402     }
1403   }
1404   if (GetView())
1405     view_->SetTooltipText(wrapped_tooltip_text);
1406 }
1407
1408 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1409   waiting_for_screen_rects_ack_ = false;
1410   if (!view_)
1411     return;
1412
1413   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1414       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1415     return;
1416   }
1417
1418   SendScreenRects();
1419 }
1420
1421 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1422   if (view_) {
1423     view_->SetBounds(pos);
1424     Send(new ViewMsg_Move_ACK(routing_id_));
1425   }
1426 }
1427
1428 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1429     const IPC::Message& message) {
1430   // This trace event is used in
1431   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1432   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1433   ViewHostMsg_SwapCompositorFrame::Param param;
1434   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1435     return false;
1436   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1437   uint32 output_surface_id = base::get<0>(param);
1438   base::get<1>(param).AssignTo(frame.get());
1439   std::vector<IPC::Message> messages_to_deliver_with_frame;
1440   messages_to_deliver_with_frame.swap(base::get<2>(param));
1441
1442   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1443
1444   bool is_mobile_optimized = IsMobileOptimizedFrame(frame->metadata);
1445   input_router_->NotifySiteIsMobileOptimized(is_mobile_optimized);
1446   if (touch_emulator_)
1447     touch_emulator_->SetDoubleTapSupportForPageEnabled(!is_mobile_optimized);
1448
1449   if (view_) {
1450     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1451     view_->DidReceiveRendererFrame();
1452   } else {
1453     cc::CompositorFrameAck ack;
1454     if (frame->gl_frame_data) {
1455       ack.gl_frame_data = frame->gl_frame_data.Pass();
1456       ack.gl_frame_data->sync_point = 0;
1457     } else if (frame->delegated_frame_data) {
1458       cc::TransferableResource::ReturnResources(
1459           frame->delegated_frame_data->resource_list,
1460           &ack.resources);
1461     } else if (frame->software_frame_data) {
1462       ack.last_software_frame_id = frame->software_frame_data->id;
1463     }
1464     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1465                                process_->GetID(), ack);
1466   }
1467
1468   RenderProcessHost* rph = GetProcess();
1469   for (std::vector<IPC::Message>::const_iterator i =
1470            messages_to_deliver_with_frame.begin();
1471        i != messages_to_deliver_with_frame.end();
1472        ++i) {
1473     rph->OnMessageReceived(*i);
1474     if (i->dispatch_error())
1475       rph->OnBadMessageReceived(*i);
1476   }
1477   messages_to_deliver_with_frame.clear();
1478
1479   return true;
1480 }
1481
1482 void RenderWidgetHostImpl::OnUpdateRect(
1483     const ViewHostMsg_UpdateRect_Params& params) {
1484   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1485   TimeTicks paint_start = TimeTicks::Now();
1486
1487   // Update our knowledge of the RenderWidget's size.
1488   current_size_ = params.view_size;
1489
1490   bool is_resize_ack =
1491       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1492
1493   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1494   // that will end up reaching GetBackingStore.
1495   if (is_resize_ack) {
1496     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1497     resize_ack_pending_ = false;
1498   }
1499
1500   bool is_repaint_ack =
1501       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1502   if (is_repaint_ack) {
1503     DCHECK(repaint_ack_pending_);
1504     TRACE_EVENT_ASYNC_END0(
1505         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1506     repaint_ack_pending_ = false;
1507     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1508     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1509   }
1510
1511   DCHECK(!params.view_size.IsEmpty());
1512
1513   DidUpdateBackingStore(params, paint_start);
1514
1515   if (auto_resize_enabled_) {
1516     bool post_callback = new_auto_size_.IsEmpty();
1517     new_auto_size_ = params.view_size;
1518     if (post_callback) {
1519       base::ThreadTaskRunnerHandle::Get()->PostTask(
1520           FROM_HERE, base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1521                                 weak_factory_.GetWeakPtr()));
1522     }
1523   }
1524
1525   // Log the time delta for processing a paint message. On platforms that don't
1526   // support asynchronous painting, this is equivalent to
1527   // MPArch.RWH_TotalPaintTime.
1528   TimeDelta delta = TimeTicks::Now() - paint_start;
1529   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1530 }
1531
1532 void RenderWidgetHostImpl::DidUpdateBackingStore(
1533     const ViewHostMsg_UpdateRect_Params& params,
1534     const TimeTicks& paint_start) {
1535   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1536   TimeTicks update_start = TimeTicks::Now();
1537
1538   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1539   // will not be re-issued, so must move them now, regardless of whether we
1540   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1541   // in the process could dispatch other window messages which could cause the
1542   // view to be destroyed.
1543   if (view_)
1544     view_->MovePluginWindows(params.plugin_window_moves);
1545
1546   NotificationService::current()->Notify(
1547       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1548       Source<RenderWidgetHost>(this),
1549       NotificationService::NoDetails());
1550
1551   // We don't need to update the view if the view is hidden. We must do this
1552   // early return after the ACK is sent, however, or the renderer will not send
1553   // us more data.
1554   if (is_hidden_)
1555     return;
1556
1557   // If we got a resize ack, then perhaps we have another resize to send?
1558   bool is_resize_ack =
1559       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1560   if (is_resize_ack)
1561     WasResized();
1562
1563   // Log the time delta for processing a paint message.
1564   TimeTicks now = TimeTicks::Now();
1565   TimeDelta delta = now - update_start;
1566   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1567 }
1568
1569 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1570     const SyntheticGesturePacket& gesture_packet) {
1571   // Only allow untrustworthy gestures if explicitly enabled.
1572   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1573           cc::switches::kEnableGpuBenchmarking)) {
1574     bad_message::ReceivedBadMessage(GetProcess(),
1575                                     bad_message::RWH_SYNTHETIC_GESTURE);
1576     return;
1577   }
1578
1579   QueueSyntheticGesture(
1580         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1581         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1582                    weak_factory_.GetWeakPtr()));
1583 }
1584
1585 void RenderWidgetHostImpl::OnFocus() {
1586   // Only RenderViewHost can deal with that message.
1587   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_FOCUS);
1588 }
1589
1590 void RenderWidgetHostImpl::OnBlur() {
1591   // Only RenderViewHost can deal with that message.
1592   bad_message::ReceivedBadMessage(GetProcess(), bad_message::RWH_BLUR);
1593 }
1594
1595 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1596   SetCursor(cursor);
1597 }
1598
1599 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1600     bool enabled, ui::GestureProviderConfigType config_type) {
1601   if (enabled) {
1602     if (!touch_emulator_)
1603       touch_emulator_.reset(new TouchEmulator(this));
1604     touch_emulator_->Enable(config_type);
1605   } else {
1606     if (touch_emulator_)
1607       touch_emulator_->Disable();
1608   }
1609 }
1610
1611 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1612     ui::TextInputType type,
1613     ui::TextInputMode input_mode,
1614     bool can_compose_inline,
1615     int flags) {
1616   if (view_)
1617     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1618 }
1619
1620 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1621     const gfx::Range& range,
1622     const std::vector<gfx::Rect>& character_bounds) {
1623   if (view_)
1624     view_->ImeCompositionRangeChanged(range, character_bounds);
1625 }
1626
1627 void RenderWidgetHostImpl::OnImeCancelComposition() {
1628   if (view_)
1629     view_->ImeCancelComposition();
1630 }
1631
1632 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1633                                        bool last_unlocked_by_target,
1634                                        bool privileged) {
1635
1636   if (pending_mouse_lock_request_) {
1637     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1638     return;
1639   } else if (IsMouseLocked()) {
1640     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1641     return;
1642   }
1643
1644   pending_mouse_lock_request_ = true;
1645   if (privileged && allow_privileged_mouse_lock_) {
1646     // Directly approve to lock the mouse.
1647     GotResponseToLockMouseRequest(true);
1648   } else {
1649     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1650   }
1651 }
1652
1653 void RenderWidgetHostImpl::OnUnlockMouse() {
1654   RejectMouseLockOrUnlockIfNecessary();
1655 }
1656
1657 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1658     const gfx::Rect& rect_pixels,
1659     const gfx::Size& size,
1660     const cc::SharedBitmapId& id) {
1661   DCHECK(!rect_pixels.IsEmpty());
1662   DCHECK(!size.IsEmpty());
1663
1664   scoped_ptr<cc::SharedBitmap> bitmap =
1665       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1666   if (!bitmap) {
1667     bad_message::ReceivedBadMessage(GetProcess(),
1668                                     bad_message::RWH_SHARED_BITMAP);
1669     return;
1670   }
1671
1672   DCHECK(bitmap->pixels());
1673
1674   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1675   SkBitmap zoomed_bitmap;
1676   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1677
1678   // Note that |rect| is in coordinates of pixels relative to the window origin.
1679   // Aura-based systems will want to convert this to DIPs.
1680   if (view_)
1681     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1682
1683   // It is assumed that the disambiguation popup will make a copy of the
1684   // provided zoomed image, so we delete this one.
1685   zoomed_bitmap.setPixels(0);
1686   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1687 }
1688
1689 #if defined(OS_WIN)
1690 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1691     gfx::NativeViewId dummy_activation_window) {
1692   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1693
1694   // This may happen as a result of a race condition when the plugin is going
1695   // away.
1696   wchar_t window_title[MAX_PATH + 1] = {0};
1697   if (!IsWindow(hwnd) ||
1698       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1699       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1700     return;
1701   }
1702
1703 #if defined(USE_AURA)
1704   SetParent(hwnd,
1705             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1706 #else
1707   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1708 #endif
1709   dummy_windows_for_activation_.push_back(hwnd);
1710 }
1711
1712 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1713     gfx::NativeViewId dummy_activation_window) {
1714   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1715   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1716   for (; i != dummy_windows_for_activation_.end(); ++i) {
1717     if ((*i) == hwnd) {
1718       dummy_windows_for_activation_.erase(i);
1719       return;
1720     }
1721   }
1722   NOTREACHED() << "Unknown dummy window";
1723 }
1724 #endif
1725
1726 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1727   ignore_input_events_ = ignore_input_events;
1728 }
1729
1730 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1731     const NativeWebKeyboardEvent& event) {
1732   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1733     return false;
1734
1735   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1736     size_t original_size = key_press_event_callbacks_.size();
1737     if (key_press_event_callbacks_[i].Run(event))
1738       return true;
1739
1740     // Check whether the callback that just ran removed itself, in which case
1741     // the iterator needs to be decremented to properly account for the removal.
1742     size_t current_size = key_press_event_callbacks_.size();
1743     if (current_size != original_size) {
1744       DCHECK_EQ(original_size - 1, current_size);
1745       --i;
1746     }
1747   }
1748
1749   return false;
1750 }
1751
1752 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1753     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1754   // Don't ignore touch cancel events, since they may be sent while input
1755   // events are being ignored in order to keep the renderer from getting
1756   // confused about how many touches are active.
1757   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1758     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1759
1760   if (!process_->HasConnection())
1761     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1762
1763   if (event.type == WebInputEvent::MouseDown ||
1764       event.type == WebInputEvent::GestureTapDown) {
1765     OnUserGesture();
1766   }
1767
1768   return view_ ? view_->FilterInputEvent(event)
1769                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1770 }
1771
1772 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1773   increment_in_flight_event_count();
1774   if (!is_hidden_)
1775     StartHangMonitorTimeout(hung_renderer_delay_);
1776 }
1777
1778 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1779   if (decrement_in_flight_event_count() <= 0) {
1780     // Cancel pending hung renderer checks since the renderer is responsive.
1781     StopHangMonitorTimeout();
1782   } else {
1783     // The renderer is responsive, but there are in-flight events to wait for.
1784     if (!is_hidden_)
1785       RestartHangMonitorTimeout();
1786   }
1787 }
1788
1789 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1790   has_touch_handler_ = has_handlers;
1791 }
1792
1793 void RenderWidgetHostImpl::DidFlush() {
1794   if (synthetic_gesture_controller_)
1795     synthetic_gesture_controller_->OnDidFlushInput();
1796 }
1797
1798 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1799   if (view_)
1800     view_->DidOverscroll(params);
1801 }
1802
1803 void RenderWidgetHostImpl::DidStopFlinging() {
1804   if (view_)
1805     view_->DidStopFlinging();
1806 }
1807
1808 void RenderWidgetHostImpl::OnKeyboardEventAck(
1809       const NativeWebKeyboardEvent& event,
1810       InputEventAckState ack_result) {
1811 #if defined(OS_MACOSX)
1812   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1813     return;
1814 #endif
1815
1816   // We only send unprocessed key event upwards if we are not hidden,
1817   // because the user has moved away from us and no longer expect any effect
1818   // of this key event.
1819   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1820   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1821     delegate_->HandleKeyboardEvent(event);
1822
1823     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1824     // (i.e.  in the case of Ctrl+W, where the call to
1825     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1826   }
1827 }
1828
1829 void RenderWidgetHostImpl::OnWheelEventAck(
1830     const MouseWheelEventWithLatencyInfo& wheel_event,
1831     InputEventAckState ack_result) {
1832   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1833
1834   if (!is_hidden() && view_) {
1835     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1836         delegate_->HandleWheelEvent(wheel_event.event)) {
1837       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1838     }
1839     view_->WheelEventAck(wheel_event.event, ack_result);
1840   }
1841 }
1842
1843 void RenderWidgetHostImpl::OnGestureEventAck(
1844     const GestureEventWithLatencyInfo& event,
1845     InputEventAckState ack_result) {
1846   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1847
1848   if (view_)
1849     view_->GestureEventAck(event.event, ack_result);
1850 }
1851
1852 void RenderWidgetHostImpl::OnTouchEventAck(
1853     const TouchEventWithLatencyInfo& event,
1854     InputEventAckState ack_result) {
1855   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1856
1857   if (touch_emulator_ &&
1858       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1859     return;
1860   }
1861
1862   if (view_)
1863     view_->ProcessAckedTouchEvent(event, ack_result);
1864 }
1865
1866 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1867   if (type == BAD_ACK_MESSAGE) {
1868     bad_message::ReceivedBadMessage(process_, bad_message::RWH_BAD_ACK_MESSAGE);
1869   } else if (type == UNEXPECTED_EVENT_TYPE) {
1870     suppress_next_char_events_ = false;
1871   }
1872 }
1873
1874 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1875     SyntheticGesture::Result result) {
1876   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1877 }
1878
1879 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1880   return ignore_input_events_ || process_->IgnoreInputEvents();
1881 }
1882
1883 void RenderWidgetHostImpl::StartUserGesture() {
1884   OnUserGesture();
1885 }
1886
1887 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1888   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1889 }
1890
1891 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1892     const std::vector<EditCommand>& commands) {
1893   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1894 }
1895
1896 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1897                                               const std::string& value) {
1898   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1899 }
1900
1901 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1902     const gfx::Rect& rect) {
1903   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1904 }
1905
1906 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1907   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1908 }
1909
1910 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1911   if (!allowed) {
1912     RejectMouseLockOrUnlockIfNecessary();
1913     return false;
1914   } else {
1915     if (!pending_mouse_lock_request_) {
1916       // This is possible, e.g., the plugin sends us an unlock request before
1917       // the user allows to lock to mouse.
1918       return false;
1919     }
1920
1921     pending_mouse_lock_request_ = false;
1922     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1923       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1924       return false;
1925     } else {
1926       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1927       return true;
1928     }
1929   }
1930 }
1931
1932 // static
1933 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1934     int32 route_id,
1935     uint32 output_surface_id,
1936     int renderer_host_id,
1937     const cc::CompositorFrameAck& ack) {
1938   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1939   if (!host)
1940     return;
1941   host->Send(new ViewMsg_SwapCompositorFrameAck(
1942       route_id, output_surface_id, ack));
1943 }
1944
1945 // static
1946 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1947     int32 route_id,
1948     uint32 output_surface_id,
1949     int renderer_host_id,
1950     const cc::CompositorFrameAck& ack) {
1951   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1952   if (!host)
1953     return;
1954   host->Send(
1955       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1956 }
1957
1958 void RenderWidgetHostImpl::DelayedAutoResized() {
1959   gfx::Size new_size = new_auto_size_;
1960   // Clear the new_auto_size_ since the empty value is used as a flag to
1961   // indicate that no callback is in progress (i.e. without this line
1962   // DelayedAutoResized will not get called again).
1963   new_auto_size_.SetSize(0, 0);
1964   if (!auto_resize_enabled_)
1965     return;
1966
1967   OnRenderAutoResized(new_size);
1968 }
1969
1970 void RenderWidgetHostImpl::DetachDelegate() {
1971   delegate_ = NULL;
1972 }
1973
1974 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1975   ui::LatencyInfo::LatencyComponent window_snapshot_component;
1976   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1977                                GetLatencyComponentId(),
1978                                &window_snapshot_component)) {
1979     int sequence_number = static_cast<int>(
1980         window_snapshot_component.sequence_number);
1981 #if defined(OS_MACOSX)
1982     // On Mac, when using CoreAnmation, there is a delay between when content
1983     // is drawn to the screen, and when the snapshot will actually pick up
1984     // that content. Insert a manual delay of 1/6th of a second (to simulate
1985     // 10 frames at 60 fps) before actually taking the snapshot.
1986     base::MessageLoop::current()->PostDelayedTask(
1987         FROM_HERE,
1988         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
1989                    weak_factory_.GetWeakPtr(),
1990                    sequence_number),
1991         base::TimeDelta::FromSecondsD(1. / 6));
1992 #else
1993     WindowSnapshotReachedScreen(sequence_number);
1994 #endif
1995   }
1996
1997   latency_tracker_.OnFrameSwapped(latency_info);
1998 }
1999
2000 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2001   view_->DidReceiveRendererFrame();
2002 }
2003
2004 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2005   DCHECK(base::MessageLoopForUI::IsCurrent());
2006
2007   gfx::Rect view_bounds = GetView()->GetViewBounds();
2008   gfx::Rect snapshot_bounds(view_bounds.size());
2009
2010   std::vector<unsigned char> png;
2011   if (ui::GrabViewSnapshot(
2012       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2013     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2014     return;
2015   }
2016
2017   ui::GrabViewSnapshotAsync(
2018       GetView()->GetNativeView(),
2019       snapshot_bounds,
2020       base::ThreadTaskRunnerHandle::Get(),
2021       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2022                  weak_factory_.GetWeakPtr(),
2023                  snapshot_id));
2024 }
2025
2026 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2027                                                   const unsigned char* data,
2028                                                   size_t size) {
2029   // Any pending snapshots with a lower ID than the one received are considered
2030   // to be implicitly complete, and returned the same snapshot data.
2031   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2032   while(it != pending_browser_snapshots_.end()) {
2033       if (it->first <= snapshot_id) {
2034         it->second.Run(data, size);
2035         pending_browser_snapshots_.erase(it++);
2036       } else {
2037         ++it;
2038       }
2039   }
2040 }
2041
2042 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2043     int snapshot_id,
2044     scoped_refptr<base::RefCountedBytes> png_data) {
2045   if (png_data.get())
2046     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2047   else
2048     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2049 }
2050
2051 // static
2052 void RenderWidgetHostImpl::CompositorFrameDrawn(
2053     const std::vector<ui::LatencyInfo>& latency_info) {
2054   for (size_t i = 0; i < latency_info.size(); i++) {
2055     std::set<RenderWidgetHostImpl*> rwhi_set;
2056     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2057              latency_info[i].latency_components.begin();
2058          b != latency_info[i].latency_components.end();
2059          ++b) {
2060       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2061           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2062           b->first.first == ui::TAB_SHOW_COMPONENT) {
2063         // Matches with GetLatencyComponentId
2064         int routing_id = b->first.second & 0xffffffff;
2065         int process_id = (b->first.second >> 32) & 0xffffffff;
2066         RenderWidgetHost* rwh =
2067             RenderWidgetHost::FromID(process_id, routing_id);
2068         if (!rwh) {
2069           continue;
2070         }
2071         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2072         if (rwhi_set.insert(rwhi).second)
2073           rwhi->FrameSwapped(latency_info[i]);
2074       }
2075     }
2076   }
2077 }
2078
2079 BrowserAccessibilityManager*
2080     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2081   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2082 }
2083
2084 BrowserAccessibilityManager*
2085     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2086   return delegate_ ?
2087       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2088 }
2089
2090 base::TimeDelta RenderWidgetHostImpl::GetEstimatedBrowserCompositeTime() const {
2091   return latency_tracker_.GetEstimatedBrowserCompositeTime();
2092 }
2093
2094 #if defined(OS_WIN)
2095 gfx::NativeViewAccessible
2096     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2097   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2098 }
2099 #endif
2100
2101 }  // namespace content