content/browser/renderer_host/render_widget_host_impl.cc

   1 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #include "content/browser/renderer_host/render_widget_host_impl.h"
   6
   7 #include <math.h>
   8 #include <set>
   9 #include <utility>
  10
  11 #include "base/auto_reset.h"
  12 #include "base/bind.h"
  13 #include "base/command_line.h"
  14 #include "base/containers/hash_tables.h"
  15 #include "base/debug/trace_event.h"
  16 #include "base/i18n/rtl.h"
  17 #include "base/lazy_instance.h"
  18 #include "base/message_loop/message_loop.h"
  19 #include "base/metrics/field_trial.h"
  20 #include "base/metrics/histogram.h"
  21 #include "base/strings/string_number_conversions.h"
  22 #include "base/strings/utf_string_conversions.h"
  23 #include "base/thread_task_runner_handle.h"
  24 #include "cc/base/switches.h"
  25 #include "cc/output/compositor_frame.h"
  26 #include "cc/output/compositor_frame_ack.h"
  27 #include "content/browser/accessibility/accessibility_mode_helper.h"
  28 #include "content/browser/accessibility/browser_accessibility_state_impl.h"
  29 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  30 #include "content/browser/gpu/compositor_util.h"
  31 #include "content/browser/gpu/gpu_process_host.h"
  32 #include "content/browser/gpu/gpu_process_host_ui_shim.h"
  33 #include "content/browser/gpu/gpu_surface_tracker.h"
  34 #include "content/browser/renderer_host/dip_util.h"
  35 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  36 #include "content/browser/renderer_host/input/input_router_impl.h"
  37 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  38 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  39 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  40 #include "content/browser/renderer_host/input/timeout_monitor.h"
  41 #include "content/browser/renderer_host/input/touch_emulator.h"
  42 #include "content/browser/renderer_host/render_process_host_impl.h"
  43 #include "content/browser/renderer_host/render_view_host_impl.h"
  44 #include "content/browser/renderer_host/render_widget_helper.h"
  45 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  46 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  47 #include "content/browser/renderer_host/render_widget_resize_helper.h"
  48 #include "content/common/content_constants_internal.h"
  49 #include "content/common/cursors/webcursor.h"
  50 #include "content/common/gpu/gpu_messages.h"
  51 #include "content/common/host_shared_bitmap_manager.h"
  52 #include "content/common/input_messages.h"
  53 #include "content/common/view_messages.h"
  54 #include "content/public/browser/native_web_keyboard_event.h"
  55 #include "content/public/browser/notification_service.h"
  56 #include "content/public/browser/notification_types.h"
  57 #include "content/public/browser/render_widget_host_iterator.h"
  58 #include "content/public/browser/user_metrics.h"
  59 #include "content/public/common/content_constants.h"
  60 #include "content/public/common/content_switches.h"
  61 #include "content/public/common/result_codes.h"
  62 #include "content/public/common/web_preferences.h"
  63 #include "gpu/GLES2/gl2extchromium.h"
  64 #include "gpu/command_buffer/service/gpu_switches.h"
  65 #include "skia/ext/image_operations.h"
  66 #include "skia/ext/platform_canvas.h"
  67 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  68 #include "ui/events/event.h"
  69 #include "ui/events/keycodes/keyboard_codes.h"
  70 #include "ui/gfx/geometry/size_conversions.h"
  71 #include "ui/gfx/geometry/vector2d_conversions.h"
  72 #include "ui/gfx/skbitmap_operations.h"
  73 #include "ui/snapshot/snapshot.h"
  74
  75 #if defined(OS_WIN)
  76 #include "content/common/plugin_constants_win.h"
  77 #endif
  78
  79 using base::Time;
  80 using base::TimeDelta;
  81 using base::TimeTicks;
  82 using blink::WebGestureEvent;
  83 using blink::WebInputEvent;
  84 using blink::WebKeyboardEvent;
  85 using blink::WebMouseEvent;
  86 using blink::WebMouseWheelEvent;
  87 using blink::WebTextDirection;
  88
  89 namespace content {
  90 namespace {
  91
  92 bool g_check_for_pending_resize_ack = true;
  93
  94 typedef std::pair<int32, int32> RenderWidgetHostID;
  95 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  96     RoutingIDWidgetMap;
  97 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
  98     LAZY_INSTANCE_INITIALIZER;
  99
 100 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
 101     const cc::CompositorFrameMetadata metadata) {
 102   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 103
 104   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 105     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 106
 107   const float window_width_dip = std::ceil(
 108       metadata.page_scale_factor * metadata.scrollable_viewport_size.width());
 109   const float content_width_css = metadata.root_layer_size.width();
 110   if (content_width_css <= window_width_dip)
 111     view_flags |= InputRouter::MOBILE_VIEWPORT;
 112
 113   return view_flags;
 114 }
 115
 116 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 117 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 118 // iteration (or NULL if there isn't any left).
 119 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 120  public:
 121   RenderWidgetHostIteratorImpl()
 122       : current_index_(0) {
 123   }
 124
 125   ~RenderWidgetHostIteratorImpl() override {}
 126
 127   void Add(RenderWidgetHost* host) {
 128     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 129                                         host->GetRoutingID()));
 130   }
 131
 132   // RenderWidgetHostIterator:
 133   RenderWidgetHost* GetNextHost() override {
 134     RenderWidgetHost* host = NULL;
 135     while (current_index_ < hosts_.size() && !host) {
 136       RenderWidgetHostID id = hosts_[current_index_];
 137       host = RenderWidgetHost::FromID(id.first, id.second);
 138       ++current_index_;
 139     }
 140     return host;
 141   }
 142
 143  private:
 144   std::vector<RenderWidgetHostID> hosts_;
 145   size_t current_index_;
 146
 147   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 148 };
 149
 150 }  // namespace
 151
 152 ///////////////////////////////////////////////////////////////////////////////
 153 // RenderWidgetHostImpl
 154
 155 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 156                                            RenderProcessHost* process,
 157                                            int routing_id,
 158                                            bool hidden)
 159     : view_(NULL),
 160       renderer_initialized_(false),
 161       hung_renderer_delay_ms_(kHungRendererDelayMs),
 162       delegate_(delegate),
 163       process_(process),
 164       routing_id_(routing_id),
 165       surface_id_(0),
 166       is_loading_(false),
 167       is_hidden_(hidden),
 168       repaint_ack_pending_(false),
 169       resize_ack_pending_(false),
 170       screen_info_out_of_date_(false),
 171       auto_resize_enabled_(false),
 172       waiting_for_screen_rects_ack_(false),
 173       needs_repainting_on_restore_(false),
 174       is_unresponsive_(false),
 175       in_flight_event_count_(0),
 176       in_get_backing_store_(false),
 177       ignore_input_events_(false),
 178       input_method_active_(false),
 179       text_direction_updated_(false),
 180       text_direction_(blink::WebTextDirectionLeftToRight),
 181       text_direction_canceled_(false),
 182       suppress_next_char_events_(false),
 183       pending_mouse_lock_request_(false),
 184       allow_privileged_mouse_lock_(false),
 185       has_touch_handler_(false),
 186       next_browser_snapshot_id_(1),
 187       weak_factory_(this) {
 188   CHECK(delegate_);
 189   if (routing_id_ == MSG_ROUTING_NONE) {
 190     routing_id_ = process_->GetNextRoutingID();
 191     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 192         process_->GetID(),
 193         routing_id_);
 194   } else {
 195     // TODO(piman): This is a O(N) lookup, where we could forward the
 196     // information from the RenderWidgetHelper. The problem is that doing so
 197     // currently leaks outside of content all the way to chrome classes, and
 198     // would be a layering violation. Since we don't expect more than a few
 199     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 200     // problem, for example by tracking in the RenderWidgetHelper the routing id
 201     // (and surface id) that have been created, but whose RWH haven't yet.
 202     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 203         process_->GetID(),
 204         routing_id_);
 205     DCHECK(surface_id_);
 206   }
 207
 208   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 209       g_routing_id_widget_map.Get().insert(std::make_pair(
 210           RenderWidgetHostID(process->GetID(), routing_id_), this));
 211   CHECK(result.second) << "Inserting a duplicate item!";
 212   process_->AddRoute(routing_id_, this);
 213
 214   // If we're initially visible, tell the process host that we're alive.
 215   // Otherwise we'll notify the process host when we are first shown.
 216   if (!hidden)
 217     process_->WidgetRestored();
 218
 219   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 220
 221   input_router_.reset(new InputRouterImpl(
 222       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 223
 224   touch_emulator_.reset();
 225
 226   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 227       IsRenderView() ? RenderViewHost::From(this) : NULL);
 228   if (BrowserPluginGuest::IsGuest(rvh) ||
 229       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 230           switches::kDisableHangMonitor)) {
 231     hang_monitor_timeout_.reset(new TimeoutMonitor(
 232         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 233                    weak_factory_.GetWeakPtr())));
 234   }
 235 }
 236
 237 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 238   if (view_weak_)
 239     view_weak_->RenderWidgetHostGone();
 240   SetView(NULL);
 241
 242   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 243   surface_id_ = 0;
 244
 245   process_->RemoveRoute(routing_id_);
 246   g_routing_id_widget_map.Get().erase(
 247       RenderWidgetHostID(process_->GetID(), routing_id_));
 248
 249   if (delegate_)
 250     delegate_->RenderWidgetDeleted(this);
 251 }
 252
 253 // static
 254 RenderWidgetHost* RenderWidgetHost::FromID(
 255     int32 process_id,
 256     int32 routing_id) {
 257   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 258 }
 259
 260 // static
 261 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 262     int32 process_id,
 263     int32 routing_id) {
 264   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 265   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 266   RoutingIDWidgetMap::iterator it = widgets->find(
 267       RenderWidgetHostID(process_id, routing_id));
 268   return it == widgets->end() ? NULL : it->second;
 269 }
 270
 271 // static
 272 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 273   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 274   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 275   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 276        it != widgets->end();
 277        ++it) {
 278     RenderWidgetHost* widget = it->second;
 279
 280     if (!widget->IsRenderView()) {
 281       hosts->Add(widget);
 282       continue;
 283     }
 284
 285     // Add only active RenderViewHosts.
 286     RenderViewHost* rvh = RenderViewHost::From(widget);
 287     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 288       hosts->Add(widget);
 289   }
 290
 291   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 292 }
 293
 294 // static
 295 scoped_ptr<RenderWidgetHostIterator>
 296 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 297   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 298   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 299   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 300        it != widgets->end();
 301        ++it) {
 302     hosts->Add(it->second);
 303   }
 304
 305   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 306 }
 307
 308 // static
 309 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 310   return rwh->AsRenderWidgetHostImpl();
 311 }
 312
 313 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 314   if (view)
 315     view_weak_ = view->GetWeakPtr();
 316   else
 317     view_weak_.reset();
 318   view_ = view;
 319
 320   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 321       surface_id_, GetCompositingSurface());
 322
 323   synthetic_gesture_controller_.reset();
 324 }
 325
 326 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 327   return process_;
 328 }
 329
 330 int RenderWidgetHostImpl::GetRoutingID() const {
 331   return routing_id_;
 332 }
 333
 334 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 335   return view_;
 336 }
 337
 338 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 339   return this;
 340 }
 341
 342 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 343   if (view_)
 344     return view_->GetNativeViewId();
 345   return 0;
 346 }
 347
 348 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 349   if (view_)
 350     return view_->GetCompositingSurface();
 351   return gfx::GLSurfaceHandle();
 352 }
 353
 354 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 355   resize_ack_pending_ = false;
 356   if (repaint_ack_pending_) {
 357     TRACE_EVENT_ASYNC_END0(
 358         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 359   }
 360   repaint_ack_pending_ = false;
 361   if (old_resize_params_)
 362     old_resize_params_->new_size = gfx::Size();
 363 }
 364
 365 void RenderWidgetHostImpl::SendScreenRects() {
 366   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 367     return;
 368
 369   if (is_hidden_) {
 370     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 371     // happens on Win & Mac, and when the view is shown it'll call this again.
 372     return;
 373   }
 374
 375   if (!view_)
 376     return;
 377
 378   last_view_screen_rect_ = view_->GetViewBounds();
 379   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 380   Send(new ViewMsg_UpdateScreenRects(
 381       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 382   if (delegate_)
 383     delegate_->DidSendScreenRects(this);
 384   waiting_for_screen_rects_ack_ = true;
 385 }
 386
 387 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 388   suppress_next_char_events_ = true;
 389 }
 390
 391 void RenderWidgetHostImpl::FlushInput() {
 392   input_router_->Flush();
 393   if (synthetic_gesture_controller_)
 394     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 395 }
 396
 397 void RenderWidgetHostImpl::SetNeedsFlush() {
 398   if (view_)
 399     view_->OnSetNeedsFlushInput();
 400 }
 401
 402 void RenderWidgetHostImpl::Init() {
 403   DCHECK(process_->HasConnection());
 404
 405   renderer_initialized_ = true;
 406
 407   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 408       surface_id_, GetCompositingSurface());
 409
 410   // Send the ack along with the information on placement.
 411   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 412   GetProcess()->ResumeRequestsForView(routing_id_);
 413
 414   WasResized();
 415 }
 416
 417 void RenderWidgetHostImpl::Shutdown() {
 418   RejectMouseLockOrUnlockIfNecessary();
 419
 420   if (process_->HasConnection()) {
 421     // Tell the renderer object to close.
 422     bool rv = Send(new ViewMsg_Close(routing_id_));
 423     DCHECK(rv);
 424   }
 425
 426   Destroy();
 427 }
 428
 429 bool RenderWidgetHostImpl::IsLoading() const {
 430   return is_loading_;
 431 }
 432
 433 bool RenderWidgetHostImpl::IsRenderView() const {
 434   return false;
 435 }
 436
 437 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 438   bool handled = true;
 439   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 440     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 441                         OnQueueSyntheticGesture)
 442     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 443                         OnImeCancelComposition)
 444     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 445     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderProcessGone, OnRenderProcessGone)
 446     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 447     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 448                         OnUpdateScreenRectsAck)
 449     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 450     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 451     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 452                                 OnSwapCompositorFrame(msg))
 453     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 457     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 459                         OnTextInputTypeChanged)
 460     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 461     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 462     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 463                         OnShowDisambiguationPopup)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 466                         OnSelectionBoundsChanged)
 467 #if defined(OS_WIN)
 468     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 469                         OnWindowlessPluginDummyWindowCreated)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 471                         OnWindowlessPluginDummyWindowDestroyed)
 472 #endif
 473     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 474                         OnImeCompositionRangeChanged)
 475     IPC_MESSAGE_UNHANDLED(handled = false)
 476   IPC_END_MESSAGE_MAP()
 477
 478   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 479     return true;
 480
 481   if (!handled && view_ && view_->OnMessageReceived(msg))
 482     return true;
 483
 484   return handled;
 485 }
 486
 487 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 488   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 489     return input_router_->SendInput(make_scoped_ptr(msg));
 490
 491   return process_->Send(msg);
 492 }
 493
 494 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 495   is_loading_ = is_loading;
 496   if (!view_)
 497     return;
 498   view_->SetIsLoading(is_loading);
 499 }
 500
 501 void RenderWidgetHostImpl::WasHidden() {
 502   if (is_hidden_)
 503     return;
 504
 505   is_hidden_ = true;
 506
 507   // Don't bother reporting hung state when we aren't active.
 508   StopHangMonitorTimeout();
 509
 510   // If we have a renderer, then inform it that we are being hidden so it can
 511   // reduce its resource utilization.
 512   Send(new ViewMsg_WasHidden(routing_id_));
 513
 514   // Tell the RenderProcessHost we were hidden.
 515   process_->WidgetHidden();
 516
 517   bool is_visible = false;
 518   NotificationService::current()->Notify(
 519       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 520       Source<RenderWidgetHost>(this),
 521       Details<bool>(&is_visible));
 522 }
 523
 524 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 525   if (!is_hidden_)
 526     return;
 527   is_hidden_ = false;
 528
 529   SendScreenRects();
 530
 531   // Always repaint on restore.
 532   bool needs_repainting = true;
 533   needs_repainting_on_restore_ = false;
 534   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 535
 536   process_->WidgetRestored();
 537
 538   bool is_visible = true;
 539   NotificationService::current()->Notify(
 540       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 541       Source<RenderWidgetHost>(this),
 542       Details<bool>(&is_visible));
 543
 544   // It's possible for our size to be out of sync with the renderer. The
 545   // following is one case that leads to this:
 546   // 1. WasResized -> Send ViewMsg_Resize to render
 547   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 548   // 3. WasHidden
 549   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 550   //    is hidden. Now renderer/browser out of sync with what they think size
 551   //    is.
 552   // By invoking WasResized the renderer is updated as necessary. WasResized
 553   // does nothing if the sizes are already in sync.
 554   //
 555   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 556   // could handle both the restore and resize at once. This isn't that big a
 557   // deal as RenderWidget::WasShown delays updating, so that the resize from
 558   // WasResized is usually processed before the renderer is painted.
 559   WasResized();
 560 }
 561
 562 void RenderWidgetHostImpl::GetResizeParams(
 563     ViewMsg_Resize_Params* resize_params) {
 564   *resize_params = ViewMsg_Resize_Params();
 565
 566   if (!screen_info_) {
 567     screen_info_.reset(new blink::WebScreenInfo);
 568     GetWebScreenInfo(screen_info_.get());
 569   }
 570   resize_params->screen_info = *screen_info_;
 571   resize_params->resizer_rect = GetRootWindowResizerRect();
 572
 573   if (view_) {
 574     resize_params->new_size = view_->GetRequestedRendererSize();
 575     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 576     resize_params->top_controls_height = view_->GetTopControlsHeight();
 577     resize_params->top_controls_shrink_blink_size =
 578         view_->DoTopControlsShrinkBlinkSize();
 579     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 580     resize_params->is_fullscreen = IsFullscreen();
 581   }
 582 }
 583
 584 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 585     const ViewMsg_Resize_Params& resize_params) {
 586   // We don't expect to receive an ACK when the requested size or the physical
 587   // backing size is empty, or when the main viewport size didn't change.
 588   if (!resize_params.new_size.IsEmpty() &&
 589       !resize_params.physical_backing_size.IsEmpty()) {
 590     resize_ack_pending_ = g_check_for_pending_resize_ack;
 591   }
 592
 593   old_resize_params_ =
 594       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 595 }
 596
 597 void RenderWidgetHostImpl::WasResized() {
 598   // Skip if the |delegate_| has already been detached because
 599   // it's web contents is being deleted.
 600   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 601       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 602     return;
 603   }
 604
 605   bool size_changed = true;
 606   bool side_payload_changed = screen_info_out_of_date_;
 607   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 608
 609   GetResizeParams(params.get());
 610   if (old_resize_params_) {
 611     size_changed = old_resize_params_->new_size != params->new_size;
 612     side_payload_changed =
 613         side_payload_changed ||
 614         old_resize_params_->physical_backing_size !=
 615             params->physical_backing_size ||
 616         old_resize_params_->is_fullscreen != params->is_fullscreen ||
 617         old_resize_params_->top_controls_height !=
 618             params->top_controls_height ||
 619         old_resize_params_->top_controls_shrink_blink_size !=
 620             params->top_controls_shrink_blink_size ||
 621         old_resize_params_->visible_viewport_size !=
 622             params->visible_viewport_size;
 623   }
 624
 625   if (!size_changed && !side_payload_changed)
 626     return;
 627
 628   // We don't expect to receive an ACK when the requested size or the physical
 629   // backing size is empty, or when the main viewport size didn't change.
 630   if (!params->new_size.IsEmpty() && !params->physical_backing_size.IsEmpty() &&
 631       size_changed) {
 632     resize_ack_pending_ = g_check_for_pending_resize_ack;
 633   }
 634
 635   if (!Send(new ViewMsg_Resize(routing_id_, *params))) {
 636     resize_ack_pending_ = false;
 637   } else {
 638     old_resize_params_.swap(params);
 639   }
 640 }
 641
 642 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 643   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 644 }
 645
 646 void RenderWidgetHostImpl::GotFocus() {
 647   Focus();
 648   if (delegate_)
 649     delegate_->RenderWidgetGotFocus(this);
 650 }
 651
 652 void RenderWidgetHostImpl::Focus() {
 653   Send(new InputMsg_SetFocus(routing_id_, true));
 654 }
 655
 656 void RenderWidgetHostImpl::Blur() {
 657   // If there is a pending mouse lock request, we don't want to reject it at
 658   // this point. The user can switch focus back to this view and approve the
 659   // request later.
 660   if (IsMouseLocked())
 661     view_->UnlockMouse();
 662
 663   if (touch_emulator_)
 664     touch_emulator_->CancelTouch();
 665
 666   Send(new InputMsg_SetFocus(routing_id_, false));
 667 }
 668
 669 void RenderWidgetHostImpl::LostCapture() {
 670   if (touch_emulator_)
 671     touch_emulator_->CancelTouch();
 672
 673   Send(new InputMsg_MouseCaptureLost(routing_id_));
 674 }
 675
 676 void RenderWidgetHostImpl::SetActive(bool active) {
 677   Send(new ViewMsg_SetActive(routing_id_, active));
 678 }
 679
 680 void RenderWidgetHostImpl::LostMouseLock() {
 681   Send(new ViewMsg_MouseLockLost(routing_id_));
 682 }
 683
 684 void RenderWidgetHostImpl::ViewDestroyed() {
 685   RejectMouseLockOrUnlockIfNecessary();
 686
 687   // TODO(evanm): tracking this may no longer be necessary;
 688   // eliminate this function if so.
 689   SetView(NULL);
 690 }
 691
 692 void RenderWidgetHostImpl::CopyFromBackingStore(
 693     const gfx::Rect& src_subrect,
 694     const gfx::Size& accelerated_dst_size,
 695     ReadbackRequestCallback& callback,
 696     const SkColorType color_type) {
 697   if (view_) {
 698     TRACE_EVENT0("browser",
 699         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 700     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 701         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 702     view_->CopyFromCompositingSurface(
 703         accelerated_copy_rect, accelerated_dst_size, callback, color_type);
 704     return;
 705   }
 706
 707   callback.Run(SkBitmap(), content::READBACK_FAILED);
 708 }
 709
 710 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 711   if (view_)
 712     return view_->IsSurfaceAvailableForCopy();
 713   return false;
 714 }
 715
 716 #if defined(OS_ANDROID)
 717 void RenderWidgetHostImpl::LockBackingStore() {
 718   if (view_)
 719     view_->LockCompositingSurface();
 720 }
 721
 722 void RenderWidgetHostImpl::UnlockBackingStore() {
 723   if (view_)
 724     view_->UnlockCompositingSurface();
 725 }
 726 #endif
 727
 728 #if defined(OS_MACOSX)
 729 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 730   TRACE_EVENT0("browser",
 731       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 732
 733   if (!CanPauseForPendingResizeOrRepaints())
 734     return;
 735
 736   WaitForSurface();
 737 }
 738
 739 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 740   // Do not pause if the view is hidden.
 741   if (is_hidden())
 742     return false;
 743
 744   // Do not pause if there is not a paint or resize already coming.
 745   if (!repaint_ack_pending_ && !resize_ack_pending_)
 746     return false;
 747
 748   return true;
 749 }
 750
 751 void RenderWidgetHostImpl::WaitForSurface() {
 752   TRACE_EVENT0("browser", "RenderWidgetHostImpl::WaitForSurface");
 753
 754   // How long to (synchronously) wait for the renderer to respond with a
 755   // new frame when our current frame doesn't exist or is the wrong size.
 756   // This timeout impacts the "choppiness" of our window resize.
 757   const int kPaintMsgTimeoutMS = 50;
 758
 759   if (!view_)
 760     return;
 761
 762   // The view_size will be current_size_ for auto-sized views and otherwise the
 763   // size of the view_. (For auto-sized views, current_size_ is updated during
 764   // UpdateRect messages.)
 765   gfx::Size view_size = current_size_;
 766   if (!auto_resize_enabled_) {
 767     // Get the desired size from the current view bounds.
 768     gfx::Rect view_rect = view_->GetViewBounds();
 769     if (view_rect.IsEmpty())
 770       return;
 771     view_size = view_rect.size();
 772   }
 773
 774   TRACE_EVENT2("renderer_host",
 775                "RenderWidgetHostImpl::WaitForBackingStore",
 776                "width",
 777                base::IntToString(view_size.width()),
 778                "height",
 779                base::IntToString(view_size.height()));
 780
 781   // We should not be asked to paint while we are hidden.  If we are hidden,
 782   // then it means that our consumer failed to call WasShown. If we're not
 783   // force creating the backing store, it's OK since we can feel free to give
 784   // out our cached one if we have it.
 785   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 786
 787   // We should never be called recursively; this can theoretically lead to
 788   // infinite recursion and almost certainly leads to lower performance.
 789   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 790   base::AutoReset<bool> auto_reset_in_get_backing_store(
 791       &in_get_backing_store_, true);
 792
 793   // We might have a surface that we can use!
 794   if (view_->HasAcceleratedSurface(view_size))
 795     return;
 796
 797   // We do not have a suitable backing store in the cache, so send out a
 798   // request to the renderer to paint the view if required.
 799   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 800     repaint_start_time_ = TimeTicks::Now();
 801     repaint_ack_pending_ = true;
 802     TRACE_EVENT_ASYNC_BEGIN0(
 803         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 804     Send(new ViewMsg_Repaint(routing_id_, view_size));
 805   }
 806
 807   TimeDelta max_delay = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 808   TimeTicks end_time = TimeTicks::Now() + max_delay;
 809   do {
 810     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForUpdate");
 811
 812     // When we have asked the RenderWidget to resize, and we are still waiting
 813     // on a response, block for a little while to see if we can't get a response
 814     // before returning the old (incorrectly sized) backing store.
 815     IPC::Message msg;
 816     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(max_delay)) {
 817
 818       // For auto-resized views, current_size_ determines the view_size and it
 819       // may have changed during the handling of an UpdateRect message.
 820       if (auto_resize_enabled_)
 821         view_size = current_size_;
 822
 823       // Break now if we got a backing store or accelerated surface of the
 824       // correct size.
 825       if (view_->HasAcceleratedSurface(view_size))
 826         return;
 827     } else {
 828       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 829       break;
 830     }
 831
 832     // Loop if we still have time left and haven't gotten a properly sized
 833     // BackingStore yet. This is necessary to support the GPU path which
 834     // typically has multiple frames pipelined -- we may need to skip one or two
 835     // BackingStore messages to get to the latest.
 836     max_delay = end_time - TimeTicks::Now();
 837   } while (max_delay > TimeDelta::FromSeconds(0));
 838 }
 839 #endif
 840
 841 bool RenderWidgetHostImpl::ScheduleComposite() {
 842   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 843       resize_ack_pending_) {
 844     return false;
 845   }
 846
 847   // Send out a request to the renderer to paint the view if required.
 848   repaint_start_time_ = TimeTicks::Now();
 849   repaint_ack_pending_ = true;
 850   TRACE_EVENT_ASYNC_BEGIN0(
 851       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 852   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 853   return true;
 854 }
 855
 856 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 857   if (hang_monitor_timeout_)
 858     hang_monitor_timeout_->Start(delay);
 859 }
 860
 861 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 862   if (hang_monitor_timeout_)
 863     hang_monitor_timeout_->Restart(
 864         base::TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
 865 }
 866
 867 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 868   if (hang_monitor_timeout_)
 869     hang_monitor_timeout_->Stop();
 870   RendererIsResponsive();
 871 }
 872
 873 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 874   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 875 }
 876
 877 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 878       const blink::WebMouseEvent& mouse_event,
 879       const ui::LatencyInfo& ui_latency) {
 880   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 881                "x", mouse_event.x, "y", mouse_event.y);
 882
 883   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 884     if (mouse_event_callbacks_[i].Run(mouse_event))
 885       return;
 886   }
 887
 888   if (IgnoreInputEvents())
 889     return;
 890
 891   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 892     return;
 893
 894   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 895   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 896   input_router_->SendMouseEvent(mouse_with_latency);
 897
 898   // Pass mouse state to gpu service if the subscribe uniform
 899   // extension is enabled.
 900   if (process_->SubscribeUniformEnabled()) {
 901     gpu::ValueState state;
 902     state.int_value[0] = mouse_event.x;
 903     state.int_value[1] = mouse_event.y;
 904     // TODO(orglofch) Separate the mapping of pending value states to the
 905     // Gpu Service to be per RWH not per process
 906     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 907   }
 908 }
 909
 910 void RenderWidgetHostImpl::OnPointerEventActivate() {
 911 }
 912
 913 void RenderWidgetHostImpl::ForwardWheelEvent(
 914     const WebMouseWheelEvent& wheel_event) {
 915   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 916 }
 917
 918 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 919       const blink::WebMouseWheelEvent& wheel_event,
 920       const ui::LatencyInfo& ui_latency) {
 921   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 922
 923   if (IgnoreInputEvents())
 924     return;
 925
 926   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 927     return;
 928
 929   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 930   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 931   input_router_->SendWheelEvent(wheel_with_latency);
 932 }
 933
 934 void RenderWidgetHostImpl::ForwardGestureEvent(
 935     const blink::WebGestureEvent& gesture_event) {
 936   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 937 }
 938
 939 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 940     const blink::WebGestureEvent& gesture_event,
 941     const ui::LatencyInfo& ui_latency) {
 942   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 943   // Early out if necessary, prior to performing latency logic.
 944   if (IgnoreInputEvents())
 945     return;
 946
 947   if (delegate_->PreHandleGestureEvent(gesture_event))
 948     return;
 949
 950   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 951   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 952   input_router_->SendGestureEvent(gesture_with_latency);
 953 }
 954
 955 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 956       const blink::WebTouchEvent& touch_event) {
 957   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 958
 959   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 960   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 961   input_router_->SendTouchEvent(touch_with_latency);
 962 }
 963
 964 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 965       const blink::WebTouchEvent& touch_event,
 966       const ui::LatencyInfo& ui_latency) {
 967   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 968
 969   // Always forward TouchEvents for touch stream consistency. They will be
 970   // ignored if appropriate in FilterInputEvent().
 971
 972   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 973   if (touch_emulator_ &&
 974       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 975     if (view_) {
 976       view_->ProcessAckedTouchEvent(
 977           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 978     }
 979     return;
 980   }
 981
 982   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 983   input_router_->SendTouchEvent(touch_with_latency);
 984 }
 985
 986 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 987     const NativeWebKeyboardEvent& key_event) {
 988   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 989   if (IgnoreInputEvents())
 990     return;
 991
 992   if (!process_->HasConnection())
 993     return;
 994
 995   // First, let keypress listeners take a shot at handling the event.  If a
 996   // listener handles the event, it should not be propagated to the renderer.
 997   if (KeyPressListenersHandleEvent(key_event)) {
 998     // Some keypresses that are accepted by the listener might have follow up
 999     // char events, which should be ignored.
1000     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1001       suppress_next_char_events_ = true;
1002     return;
1003   }
1004
1005   if (key_event.type == WebKeyboardEvent::Char &&
1006       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1007        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1008     OnUserGesture();
1009   }
1010
1011   // Double check the type to make sure caller hasn't sent us nonsense that
1012   // will mess up our key queue.
1013   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1014     return;
1015
1016   if (suppress_next_char_events_) {
1017     // If preceding RawKeyDown event was handled by the browser, then we need
1018     // suppress all Char events generated by it. Please note that, one
1019     // RawKeyDown event may generate multiple Char events, so we can't reset
1020     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1021     if (key_event.type == WebKeyboardEvent::Char)
1022       return;
1023     // We get a KeyUp or a RawKeyDown event.
1024     suppress_next_char_events_ = false;
1025   }
1026
1027   bool is_shortcut = false;
1028
1029   // Only pre-handle the key event if it's not handled by the input method.
1030   if (delegate_ && !key_event.skip_in_browser) {
1031     // We need to set |suppress_next_char_events_| to true if
1032     // PreHandleKeyboardEvent() returns true, but |this| may already be
1033     // destroyed at that time. So set |suppress_next_char_events_| true here,
1034     // then revert it afterwards when necessary.
1035     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1036       suppress_next_char_events_ = true;
1037
1038     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1039     // a hung/malicious renderer from interfering.
1040     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1041       return;
1042
1043     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1044       suppress_next_char_events_ = false;
1045   }
1046
1047   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1048     return;
1049
1050   ui::LatencyInfo latency;
1051   latency_tracker_.OnInputEvent(key_event, &latency);
1052   input_router_->SendKeyboardEvent(key_event, latency, is_shortcut);
1053 }
1054
1055 void RenderWidgetHostImpl::QueueSyntheticGesture(
1056     scoped_ptr<SyntheticGesture> synthetic_gesture,
1057     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1058   if (!synthetic_gesture_controller_ && view_) {
1059     synthetic_gesture_controller_.reset(
1060         new SyntheticGestureController(
1061             view_->CreateSyntheticGestureTarget().Pass()));
1062   }
1063   if (synthetic_gesture_controller_) {
1064     synthetic_gesture_controller_->QueueSyntheticGesture(
1065         synthetic_gesture.Pass(), on_complete);
1066   }
1067 }
1068
1069 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1070   if (!view_)
1071     return;
1072   view_->UpdateCursor(cursor);
1073 }
1074
1075 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1076   Send(new ViewMsg_ShowContextMenu(
1077       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1078 }
1079
1080 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1081   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1082 }
1083
1084 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1085   return latency_tracker_.latency_component_id();
1086 }
1087
1088 // static
1089 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1090   g_check_for_pending_resize_ack = false;
1091 }
1092
1093 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1094     const KeyPressEventCallback& callback) {
1095   key_press_event_callbacks_.push_back(callback);
1096 }
1097
1098 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1099     const KeyPressEventCallback& callback) {
1100   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1101     if (key_press_event_callbacks_[i].Equals(callback)) {
1102       key_press_event_callbacks_.erase(
1103           key_press_event_callbacks_.begin() + i);
1104       return;
1105     }
1106   }
1107 }
1108
1109 void RenderWidgetHostImpl::AddMouseEventCallback(
1110     const MouseEventCallback& callback) {
1111   mouse_event_callbacks_.push_back(callback);
1112 }
1113
1114 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1115     const MouseEventCallback& callback) {
1116   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1117     if (mouse_event_callbacks_[i].Equals(callback)) {
1118       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1119       return;
1120     }
1121   }
1122 }
1123
1124 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1125   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1126   if (view_)
1127     view_->GetScreenInfo(result);
1128   else
1129     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1130   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1131   screen_info_out_of_date_ = false;
1132 }
1133
1134 const NativeWebKeyboardEvent*
1135     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1136   return input_router_->GetLastKeyboardEvent();
1137 }
1138
1139 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1140   // The resize message (which may not happen immediately) will carry with it
1141   // the screen info as well as the new size (if the screen has changed scale
1142   // factor).
1143   InvalidateScreenInfo();
1144   WasResized();
1145 }
1146
1147 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1148   screen_info_out_of_date_ = true;
1149   screen_info_.reset();
1150 }
1151
1152 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1153     const base::Callback<void(const unsigned char*,size_t)> callback) {
1154   int id = next_browser_snapshot_id_++;
1155   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1156   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1157 }
1158
1159 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1160                                               size_t offset,
1161                                               const gfx::Range& range) {
1162   if (view_)
1163     view_->SelectionChanged(text, offset, range);
1164 }
1165
1166 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1167     const ViewHostMsg_SelectionBounds_Params& params) {
1168   if (view_) {
1169     view_->SelectionBoundsChanged(params);
1170   }
1171 }
1172
1173 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1174                                                  base::TimeDelta interval) {
1175   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1176 }
1177
1178 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1179                                           int exit_code) {
1180   // Clearing this flag causes us to re-create the renderer when recovering
1181   // from a crashed renderer.
1182   renderer_initialized_ = false;
1183
1184   waiting_for_screen_rects_ack_ = false;
1185
1186   // Must reset these to ensure that keyboard events work with a new renderer.
1187   suppress_next_char_events_ = false;
1188
1189   // Reset some fields in preparation for recovering from a crash.
1190   ResetSizeAndRepaintPendingFlags();
1191   current_size_.SetSize(0, 0);
1192   // After the renderer crashes, the view is destroyed and so the
1193   // RenderWidgetHost cannot track its visibility anymore. We assume such
1194   // RenderWidgetHost to be visible for the sake of internal accounting - be
1195   // careful about changing this - see http://crbug.com/401859.
1196   //
1197   // We need to at least make sure that the RenderProcessHost is notified about
1198   // the |is_hidden_| change, so that the renderer will have correct visibility
1199   // set when respawned.
1200   if (is_hidden_) {
1201     process_->WidgetRestored();
1202     is_hidden_ = false;
1203   }
1204
1205   // Reset this to ensure the hung renderer mechanism is working properly.
1206   in_flight_event_count_ = 0;
1207
1208   if (view_) {
1209     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1210                                                gfx::GLSurfaceHandle());
1211     view_->RenderProcessGone(status, exit_code);
1212     view_ = NULL; // The View should be deleted by RenderProcessGone.
1213     view_weak_.reset();
1214   }
1215
1216   // Reconstruct the input router to ensure that it has fresh state for a new
1217   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1218   // event. (In particular, the above call to view_->RenderProcessGone will
1219   // destroy the aura window, which may dispatch a synthetic mouse move.)
1220   input_router_.reset(new InputRouterImpl(
1221       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1222
1223   synthetic_gesture_controller_.reset();
1224 }
1225
1226 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1227   text_direction_updated_ = true;
1228   text_direction_ = direction;
1229 }
1230
1231 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1232   if (text_direction_updated_)
1233     text_direction_canceled_ = true;
1234 }
1235
1236 void RenderWidgetHostImpl::NotifyTextDirection() {
1237   if (text_direction_updated_) {
1238     if (!text_direction_canceled_)
1239       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1240     text_direction_updated_ = false;
1241     text_direction_canceled_ = false;
1242   }
1243 }
1244
1245 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1246   input_method_active_ = activate;
1247   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1248 }
1249
1250 void RenderWidgetHostImpl::CandidateWindowShown() {
1251   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1252 }
1253
1254 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1255   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1256 }
1257
1258 void RenderWidgetHostImpl::CandidateWindowHidden() {
1259   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1260 }
1261
1262 void RenderWidgetHostImpl::ImeSetComposition(
1263     const base::string16& text,
1264     const std::vector<blink::WebCompositionUnderline>& underlines,
1265     int selection_start,
1266     int selection_end) {
1267   Send(new InputMsg_ImeSetComposition(
1268             GetRoutingID(), text, underlines, selection_start, selection_end));
1269 }
1270
1271 void RenderWidgetHostImpl::ImeConfirmComposition(
1272     const base::string16& text,
1273     const gfx::Range& replacement_range,
1274     bool keep_selection) {
1275   Send(new InputMsg_ImeConfirmComposition(
1276         GetRoutingID(), text, replacement_range, keep_selection));
1277 }
1278
1279 void RenderWidgetHostImpl::ImeCancelComposition() {
1280   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1281             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1282 }
1283
1284 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1285   return gfx::Rect();
1286 }
1287
1288 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1289                                               bool last_unlocked_by_target) {
1290   // Directly reject to lock the mouse. Subclass can override this method to
1291   // decide whether to allow mouse lock or not.
1292   GotResponseToLockMouseRequest(false);
1293 }
1294
1295 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1296   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1297   if (pending_mouse_lock_request_) {
1298     pending_mouse_lock_request_ = false;
1299     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1300   } else if (IsMouseLocked()) {
1301     view_->UnlockMouse();
1302   }
1303 }
1304
1305 bool RenderWidgetHostImpl::IsMouseLocked() const {
1306   return view_ ? view_->IsMouseLocked() : false;
1307 }
1308
1309 bool RenderWidgetHostImpl::IsFullscreen() const {
1310   return false;
1311 }
1312
1313 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1314                                          const gfx::Size& min_size,
1315                                          const gfx::Size& max_size) {
1316   auto_resize_enabled_ = enable;
1317   min_size_for_auto_resize_ = min_size;
1318   max_size_for_auto_resize_ = max_size;
1319 }
1320
1321 void RenderWidgetHostImpl::Destroy() {
1322   NotificationService::current()->Notify(
1323       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1324       Source<RenderWidgetHost>(this),
1325       NotificationService::NoDetails());
1326
1327   // Tell the view to die.
1328   // Note that in the process of the view shutting down, it can call a ton
1329   // of other messages on us.  So if you do any other deinitialization here,
1330   // do it after this call to view_->Destroy().
1331   if (view_)
1332     view_->Destroy();
1333
1334   delete this;
1335 }
1336
1337 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1338   NotificationService::current()->Notify(
1339       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1340       Source<RenderWidgetHost>(this),
1341       NotificationService::NoDetails());
1342   is_unresponsive_ = true;
1343   NotifyRendererUnresponsive();
1344 }
1345
1346 void RenderWidgetHostImpl::RendererIsResponsive() {
1347   if (is_unresponsive_) {
1348     is_unresponsive_ = false;
1349     NotifyRendererResponsive();
1350   }
1351 }
1352
1353 void RenderWidgetHostImpl::OnRenderViewReady() {
1354   SendScreenRects();
1355   WasResized();
1356 }
1357
1358 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1359   // TODO(evanm): This synchronously ends up calling "delete this".
1360   // Is that really what we want in response to this message?  I'm matching
1361   // previous behavior of the code here.
1362   Destroy();
1363 }
1364
1365 void RenderWidgetHostImpl::OnClose() {
1366   Shutdown();
1367 }
1368
1369 void RenderWidgetHostImpl::OnSetTooltipText(
1370     const base::string16& tooltip_text,
1371     WebTextDirection text_direction_hint) {
1372   // First, add directionality marks around tooltip text if necessary.
1373   // A naive solution would be to simply always wrap the text. However, on
1374   // windows, Unicode directional embedding characters can't be displayed on
1375   // systems that lack RTL fonts and are instead displayed as empty squares.
1376   //
1377   // To get around this we only wrap the string when we deem it necessary i.e.
1378   // when the locale direction is different than the tooltip direction hint.
1379   //
1380   // Currently, we use element's directionality as the tooltip direction hint.
1381   // An alternate solution would be to set the overall directionality based on
1382   // trying to detect the directionality from the tooltip text rather than the
1383   // element direction.  One could argue that would be a preferable solution
1384   // but we use the current approach to match Fx & IE's behavior.
1385   base::string16 wrapped_tooltip_text = tooltip_text;
1386   if (!tooltip_text.empty()) {
1387     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1388       // Force the tooltip to have LTR directionality.
1389       wrapped_tooltip_text =
1390           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1391     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1392                !base::i18n::IsRTL()) {
1393       // Force the tooltip to have RTL directionality.
1394       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1395     }
1396   }
1397   if (GetView())
1398     view_->SetTooltipText(wrapped_tooltip_text);
1399 }
1400
1401 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1402   waiting_for_screen_rects_ack_ = false;
1403   if (!view_)
1404     return;
1405
1406   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1407       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1408     return;
1409   }
1410
1411   SendScreenRects();
1412 }
1413
1414 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1415   if (view_) {
1416     view_->SetBounds(pos);
1417     Send(new ViewMsg_Move_ACK(routing_id_));
1418   }
1419 }
1420
1421 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1422     const IPC::Message& message) {
1423   // This trace event is used in
1424   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1425   TRACE_EVENT0("test_fps",
1426                TRACE_DISABLED_BY_DEFAULT("OnSwapCompositorFrame"));
1427   ViewHostMsg_SwapCompositorFrame::Param param;
1428   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1429     return false;
1430   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1431   uint32 output_surface_id = get<0>(param);
1432   get<1>(param).AssignTo(frame.get());
1433   std::vector<IPC::Message> messages_to_deliver_with_frame;
1434   messages_to_deliver_with_frame.swap(get<2>(param));
1435
1436   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1437
1438   input_router_->OnViewUpdated(
1439       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1440
1441   if (view_) {
1442     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1443     view_->DidReceiveRendererFrame();
1444   } else {
1445     cc::CompositorFrameAck ack;
1446     if (frame->gl_frame_data) {
1447       ack.gl_frame_data = frame->gl_frame_data.Pass();
1448       ack.gl_frame_data->sync_point = 0;
1449     } else if (frame->delegated_frame_data) {
1450       cc::TransferableResource::ReturnResources(
1451           frame->delegated_frame_data->resource_list,
1452           &ack.resources);
1453     } else if (frame->software_frame_data) {
1454       ack.last_software_frame_id = frame->software_frame_data->id;
1455     }
1456     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1457                                process_->GetID(), ack);
1458   }
1459
1460   RenderProcessHost* rph = GetProcess();
1461   for (std::vector<IPC::Message>::const_iterator i =
1462            messages_to_deliver_with_frame.begin();
1463        i != messages_to_deliver_with_frame.end();
1464        ++i) {
1465     rph->OnMessageReceived(*i);
1466     if (i->dispatch_error())
1467       rph->OnBadMessageReceived(*i);
1468   }
1469   messages_to_deliver_with_frame.clear();
1470
1471   return true;
1472 }
1473
1474 void RenderWidgetHostImpl::OnFlingingStopped() {
1475   if (view_)
1476     view_->DidStopFlinging();
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::MessageLoop::current()->PostTask(
1517           FROM_HERE,
1518           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1519                      weak_factory_.GetWeakPtr()));
1520     }
1521   }
1522
1523   // Log the time delta for processing a paint message. On platforms that don't
1524   // support asynchronous painting, this is equivalent to
1525   // MPArch.RWH_TotalPaintTime.
1526   TimeDelta delta = TimeTicks::Now() - paint_start;
1527   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1528 }
1529
1530 void RenderWidgetHostImpl::DidUpdateBackingStore(
1531     const ViewHostMsg_UpdateRect_Params& params,
1532     const TimeTicks& paint_start) {
1533   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1534   TimeTicks update_start = TimeTicks::Now();
1535
1536   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1537   // will not be re-issued, so must move them now, regardless of whether we
1538   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1539   // in the process could dispatch other window messages which could cause the
1540   // view to be destroyed.
1541   if (view_)
1542     view_->MovePluginWindows(params.plugin_window_moves);
1543
1544   NotificationService::current()->Notify(
1545       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1546       Source<RenderWidgetHost>(this),
1547       NotificationService::NoDetails());
1548
1549   // We don't need to update the view if the view is hidden. We must do this
1550   // early return after the ACK is sent, however, or the renderer will not send
1551   // us more data.
1552   if (is_hidden_)
1553     return;
1554
1555   // If we got a resize ack, then perhaps we have another resize to send?
1556   bool is_resize_ack =
1557       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1558   if (is_resize_ack)
1559     WasResized();
1560
1561   // Log the time delta for processing a paint message.
1562   TimeTicks now = TimeTicks::Now();
1563   TimeDelta delta = now - update_start;
1564   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1565 }
1566
1567 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1568     const SyntheticGesturePacket& gesture_packet) {
1569   // Only allow untrustworthy gestures if explicitly enabled.
1570   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1571           cc::switches::kEnableGpuBenchmarking)) {
1572     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH7"));
1573     GetProcess()->ReceivedBadMessage();
1574     return;
1575   }
1576
1577   QueueSyntheticGesture(
1578         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1579         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1580                    weak_factory_.GetWeakPtr()));
1581 }
1582
1583 void RenderWidgetHostImpl::OnFocus() {
1584   // Only RenderViewHost can deal with that message.
1585   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH4"));
1586   GetProcess()->ReceivedBadMessage();
1587 }
1588
1589 void RenderWidgetHostImpl::OnBlur() {
1590   // Only RenderViewHost can deal with that message.
1591   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
1592   GetProcess()->ReceivedBadMessage();
1593 }
1594
1595 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1596   SetCursor(cursor);
1597 }
1598
1599 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(bool enabled) {
1600   if (enabled) {
1601     if (!touch_emulator_)
1602       touch_emulator_.reset(new TouchEmulator(this));
1603     touch_emulator_->Enable();
1604   } else {
1605     if (touch_emulator_)
1606       touch_emulator_->Disable();
1607   }
1608 }
1609
1610 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1611     ui::TextInputType type,
1612     ui::TextInputMode input_mode,
1613     bool can_compose_inline,
1614     int flags) {
1615   if (view_)
1616     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1617 }
1618
1619 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1620     const gfx::Range& range,
1621     const std::vector<gfx::Rect>& character_bounds) {
1622   if (view_)
1623     view_->ImeCompositionRangeChanged(range, character_bounds);
1624 }
1625
1626 void RenderWidgetHostImpl::OnImeCancelComposition() {
1627   if (view_)
1628     view_->ImeCancelComposition();
1629 }
1630
1631 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1632                                        bool last_unlocked_by_target,
1633                                        bool privileged) {
1634
1635   if (pending_mouse_lock_request_) {
1636     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1637     return;
1638   } else if (IsMouseLocked()) {
1639     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1640     return;
1641   }
1642
1643   pending_mouse_lock_request_ = true;
1644   if (privileged && allow_privileged_mouse_lock_) {
1645     // Directly approve to lock the mouse.
1646     GotResponseToLockMouseRequest(true);
1647   } else {
1648     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1649   }
1650 }
1651
1652 void RenderWidgetHostImpl::OnUnlockMouse() {
1653   RejectMouseLockOrUnlockIfNecessary();
1654 }
1655
1656 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1657     const gfx::Rect& rect_pixels,
1658     const gfx::Size& size,
1659     const cc::SharedBitmapId& id) {
1660   DCHECK(!rect_pixels.IsEmpty());
1661   DCHECK(!size.IsEmpty());
1662
1663   scoped_ptr<cc::SharedBitmap> bitmap =
1664       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1665   if (!bitmap) {
1666     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH6"));
1667     GetProcess()->ReceivedBadMessage();
1668     return;
1669   }
1670
1671   DCHECK(bitmap->pixels());
1672
1673   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1674   SkBitmap zoomed_bitmap;
1675   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1676
1677   // Note that |rect| is in coordinates of pixels relative to the window origin.
1678   // Aura-based systems will want to convert this to DIPs.
1679   if (view_)
1680     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1681
1682   // It is assumed that the disambiguation popup will make a copy of the
1683   // provided zoomed image, so we delete this one.
1684   zoomed_bitmap.setPixels(0);
1685   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1686 }
1687
1688 #if defined(OS_WIN)
1689 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1690     gfx::NativeViewId dummy_activation_window) {
1691   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1692
1693   // This may happen as a result of a race condition when the plugin is going
1694   // away.
1695   wchar_t window_title[MAX_PATH + 1] = {0};
1696   if (!IsWindow(hwnd) ||
1697       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1698       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1699     return;
1700   }
1701
1702 #if defined(USE_AURA)
1703   SetParent(hwnd,
1704             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1705 #else
1706   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1707 #endif
1708   dummy_windows_for_activation_.push_back(hwnd);
1709 }
1710
1711 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1712     gfx::NativeViewId dummy_activation_window) {
1713   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1714   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1715   for (; i != dummy_windows_for_activation_.end(); ++i) {
1716     if ((*i) == hwnd) {
1717       dummy_windows_for_activation_.erase(i);
1718       return;
1719     }
1720   }
1721   NOTREACHED() << "Unknown dummy window";
1722 }
1723 #endif
1724
1725 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1726   ignore_input_events_ = ignore_input_events;
1727 }
1728
1729 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1730     const NativeWebKeyboardEvent& event) {
1731   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1732     return false;
1733
1734   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1735     size_t original_size = key_press_event_callbacks_.size();
1736     if (key_press_event_callbacks_[i].Run(event))
1737       return true;
1738
1739     // Check whether the callback that just ran removed itself, in which case
1740     // the iterator needs to be decremented to properly account for the removal.
1741     size_t current_size = key_press_event_callbacks_.size();
1742     if (current_size != original_size) {
1743       DCHECK_EQ(original_size - 1, current_size);
1744       --i;
1745     }
1746   }
1747
1748   return false;
1749 }
1750
1751 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1752     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1753   // Don't ignore touch cancel events, since they may be sent while input
1754   // events are being ignored in order to keep the renderer from getting
1755   // confused about how many touches are active.
1756   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1757     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1758
1759   if (!process_->HasConnection())
1760     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1761
1762   if (event.type == WebInputEvent::MouseDown)
1763     OnUserGesture();
1764
1765   return view_ ? view_->FilterInputEvent(event)
1766                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1767 }
1768
1769 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1770   StartHangMonitorTimeout(
1771       TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
1772   increment_in_flight_event_count();
1773 }
1774
1775 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1776   if (decrement_in_flight_event_count() <= 0) {
1777     // Cancel pending hung renderer checks since the renderer is responsive.
1778     StopHangMonitorTimeout();
1779   } else {
1780     // The renderer is responsive, but there are in-flight events to wait for.
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   if (view_)
1793     view_->OnDidFlushInput();
1794 }
1795
1796 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1797   if (view_)
1798     view_->DidOverscroll(params);
1799 }
1800
1801 void RenderWidgetHostImpl::OnKeyboardEventAck(
1802       const NativeWebKeyboardEvent& event,
1803       InputEventAckState ack_result) {
1804 #if defined(OS_MACOSX)
1805   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1806     return;
1807 #endif
1808
1809   // We only send unprocessed key event upwards if we are not hidden,
1810   // because the user has moved away from us and no longer expect any effect
1811   // of this key event.
1812   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1813   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1814     delegate_->HandleKeyboardEvent(event);
1815
1816     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1817     // (i.e.  in the case of Ctrl+W, where the call to
1818     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1819   }
1820 }
1821
1822 void RenderWidgetHostImpl::OnWheelEventAck(
1823     const MouseWheelEventWithLatencyInfo& wheel_event,
1824     InputEventAckState ack_result) {
1825   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1826
1827   if (!is_hidden() && view_) {
1828     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1829         delegate_->HandleWheelEvent(wheel_event.event)) {
1830       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1831     }
1832     view_->WheelEventAck(wheel_event.event, ack_result);
1833   }
1834 }
1835
1836 void RenderWidgetHostImpl::OnGestureEventAck(
1837     const GestureEventWithLatencyInfo& event,
1838     InputEventAckState ack_result) {
1839   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1840
1841   if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED) {
1842     if (delegate_->HandleGestureEvent(event.event))
1843       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1844   }
1845
1846   if (view_)
1847     view_->GestureEventAck(event.event, ack_result);
1848 }
1849
1850 void RenderWidgetHostImpl::OnTouchEventAck(
1851     const TouchEventWithLatencyInfo& event,
1852     InputEventAckState ack_result) {
1853   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1854
1855   if (touch_emulator_ &&
1856       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1857     return;
1858   }
1859
1860   if (view_)
1861     view_->ProcessAckedTouchEvent(event, ack_result);
1862 }
1863
1864 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1865   if (type == BAD_ACK_MESSAGE) {
1866     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
1867     process_->ReceivedBadMessage();
1868   } else if (type == UNEXPECTED_EVENT_TYPE) {
1869     suppress_next_char_events_ = false;
1870   }
1871 }
1872
1873 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1874     SyntheticGesture::Result result) {
1875   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1876 }
1877
1878 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1879   return ignore_input_events_ || process_->IgnoreInputEvents();
1880 }
1881
1882 bool RenderWidgetHostImpl::ShouldForwardTouchEvent() const {
1883   // It's important that the emulator sees a complete native touch stream,
1884   // allowing it to perform touch filtering as appropriate.
1885   // TODO(dgozman): Remove when touch stream forwarding issues resolved, see
1886   // crbug.com/375940.
1887   if (touch_emulator_ && touch_emulator_->enabled())
1888     return true;
1889
1890   return input_router_->ShouldForwardTouchEvent();
1891 }
1892
1893 void RenderWidgetHostImpl::StartUserGesture() {
1894   OnUserGesture();
1895 }
1896
1897 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1898   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1899 }
1900
1901 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1902     const std::vector<EditCommand>& commands) {
1903   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1904 }
1905
1906 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1907                                               const std::string& value) {
1908   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1909 }
1910
1911 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1912     const gfx::Rect& rect) {
1913   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1914 }
1915
1916 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1917   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1918 }
1919
1920 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1921   if (!allowed) {
1922     RejectMouseLockOrUnlockIfNecessary();
1923     return false;
1924   } else {
1925     if (!pending_mouse_lock_request_) {
1926       // This is possible, e.g., the plugin sends us an unlock request before
1927       // the user allows to lock to mouse.
1928       return false;
1929     }
1930
1931     pending_mouse_lock_request_ = false;
1932     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1933       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1934       return false;
1935     } else {
1936       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1937       return true;
1938     }
1939   }
1940 }
1941
1942 // static
1943 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1944     int32 route_id,
1945     uint32 output_surface_id,
1946     int renderer_host_id,
1947     const cc::CompositorFrameAck& ack) {
1948   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1949   if (!host)
1950     return;
1951   host->Send(new ViewMsg_SwapCompositorFrameAck(
1952       route_id, output_surface_id, ack));
1953 }
1954
1955 // static
1956 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1957     int32 route_id,
1958     uint32 output_surface_id,
1959     int renderer_host_id,
1960     const cc::CompositorFrameAck& ack) {
1961   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1962   if (!host)
1963     return;
1964   host->Send(
1965       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1966 }
1967
1968 void RenderWidgetHostImpl::DelayedAutoResized() {
1969   gfx::Size new_size = new_auto_size_;
1970   // Clear the new_auto_size_ since the empty value is used as a flag to
1971   // indicate that no callback is in progress (i.e. without this line
1972   // DelayedAutoResized will not get called again).
1973   new_auto_size_.SetSize(0, 0);
1974   if (!auto_resize_enabled_)
1975     return;
1976
1977   OnRenderAutoResized(new_size);
1978 }
1979
1980 void RenderWidgetHostImpl::DetachDelegate() {
1981   delegate_ = NULL;
1982 }
1983
1984 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1985   ui::LatencyInfo::LatencyComponent window_snapshot_component;
1986   if (latency_info.FindLatency(ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1987                                GetLatencyComponentId(),
1988                                &window_snapshot_component)) {
1989     WindowOldSnapshotReachedScreen(
1990         static_cast<int>(window_snapshot_component.sequence_number));
1991   }
1992   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1993                                GetLatencyComponentId(),
1994                                &window_snapshot_component)) {
1995     int sequence_number = static_cast<int>(
1996         window_snapshot_component.sequence_number);
1997 #if defined(OS_MACOSX)
1998     // On Mac, when using CoreAnmation, there is a delay between when content
1999     // is drawn to the screen, and when the snapshot will actually pick up
2000     // that content. Insert a manual delay of 1/6th of a second (to simulate
2001     // 10 frames at 60 fps) before actually taking the snapshot.
2002     base::MessageLoop::current()->PostDelayedTask(
2003         FROM_HERE,
2004         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2005                    weak_factory_.GetWeakPtr(),
2006                    sequence_number),
2007         base::TimeDelta::FromSecondsD(1. / 6));
2008 #else
2009     WindowSnapshotReachedScreen(sequence_number);
2010 #endif
2011   }
2012
2013   latency_tracker_.OnFrameSwapped(latency_info);
2014 }
2015
2016 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2017   view_->DidReceiveRendererFrame();
2018 }
2019
2020 void RenderWidgetHostImpl::WindowSnapshotAsyncCallback(
2021     int routing_id,
2022     int snapshot_id,
2023     gfx::Size snapshot_size,
2024     scoped_refptr<base::RefCountedBytes> png_data) {
2025   if (!png_data.get()) {
2026     std::vector<unsigned char> png_vector;
2027     Send(new ViewMsg_WindowSnapshotCompleted(
2028         routing_id, snapshot_id, gfx::Size(), png_vector));
2029     return;
2030   }
2031
2032   Send(new ViewMsg_WindowSnapshotCompleted(
2033       routing_id, snapshot_id, snapshot_size, png_data->data()));
2034 }
2035
2036 void RenderWidgetHostImpl::WindowOldSnapshotReachedScreen(int snapshot_id) {
2037   DCHECK(base::MessageLoopForUI::IsCurrent());
2038
2039   std::vector<unsigned char> png;
2040
2041   // This feature is behind the kEnableGpuBenchmarking command line switch
2042   // because it poses security concerns and should only be used for testing.
2043   const base::CommandLine& command_line =
2044       *base::CommandLine::ForCurrentProcess();
2045   if (!command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
2046     Send(new ViewMsg_WindowSnapshotCompleted(
2047         GetRoutingID(), snapshot_id, gfx::Size(), png));
2048     return;
2049   }
2050
2051   gfx::Rect view_bounds = GetView()->GetViewBounds();
2052   gfx::Rect snapshot_bounds(view_bounds.size());
2053   gfx::Size snapshot_size = snapshot_bounds.size();
2054
2055   if (ui::GrabViewSnapshot(
2056           GetView()->GetNativeView(), &png, snapshot_bounds)) {
2057     Send(new ViewMsg_WindowSnapshotCompleted(
2058         GetRoutingID(), snapshot_id, snapshot_size, png));
2059     return;
2060   }
2061
2062   ui::GrabViewSnapshotAsync(
2063       GetView()->GetNativeView(),
2064       snapshot_bounds,
2065       base::ThreadTaskRunnerHandle::Get(),
2066       base::Bind(&RenderWidgetHostImpl::WindowSnapshotAsyncCallback,
2067                  weak_factory_.GetWeakPtr(),
2068                  GetRoutingID(),
2069                  snapshot_id,
2070                  snapshot_size));
2071 }
2072
2073 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2074   DCHECK(base::MessageLoopForUI::IsCurrent());
2075
2076   gfx::Rect view_bounds = GetView()->GetViewBounds();
2077   gfx::Rect snapshot_bounds(view_bounds.size());
2078
2079   std::vector<unsigned char> png;
2080   if (ui::GrabViewSnapshot(
2081       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2082     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2083     return;
2084   }
2085
2086   ui::GrabViewSnapshotAsync(
2087       GetView()->GetNativeView(),
2088       snapshot_bounds,
2089       base::ThreadTaskRunnerHandle::Get(),
2090       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2091                  weak_factory_.GetWeakPtr(),
2092                  snapshot_id));
2093 }
2094
2095 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2096                                                   const unsigned char* data,
2097                                                   size_t size) {
2098   // Any pending snapshots with a lower ID than the one received are considered
2099   // to be implicitly complete, and returned the same snapshot data.
2100   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2101   while(it != pending_browser_snapshots_.end()) {
2102       if (it->first <= snapshot_id) {
2103         it->second.Run(data, size);
2104         pending_browser_snapshots_.erase(it++);
2105       } else {
2106         ++it;
2107       }
2108   }
2109 }
2110
2111 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2112     int snapshot_id,
2113     scoped_refptr<base::RefCountedBytes> png_data) {
2114   if (png_data.get())
2115     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2116   else
2117     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2118 }
2119
2120 // static
2121 void RenderWidgetHostImpl::CompositorFrameDrawn(
2122     const std::vector<ui::LatencyInfo>& latency_info) {
2123   for (size_t i = 0; i < latency_info.size(); i++) {
2124     std::set<RenderWidgetHostImpl*> rwhi_set;
2125     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2126              latency_info[i].latency_components.begin();
2127          b != latency_info[i].latency_components.end();
2128          ++b) {
2129       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2130           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2131           b->first.first == ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2132           b->first.first == ui::TAB_SHOW_COMPONENT) {
2133         // Matches with GetLatencyComponentId
2134         int routing_id = b->first.second & 0xffffffff;
2135         int process_id = (b->first.second >> 32) & 0xffffffff;
2136         RenderWidgetHost* rwh =
2137             RenderWidgetHost::FromID(process_id, routing_id);
2138         if (!rwh) {
2139           continue;
2140         }
2141         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2142         if (rwhi_set.insert(rwhi).second)
2143           rwhi->FrameSwapped(latency_info[i]);
2144       }
2145     }
2146   }
2147 }
2148
2149 BrowserAccessibilityManager*
2150     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2151   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2152 }
2153
2154 BrowserAccessibilityManager*
2155     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2156   return delegate_ ?
2157       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2158 }
2159
2160 #if defined(OS_WIN)
2161 gfx::NativeViewAccessible
2162     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2163   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2164 }
2165 #endif
2166
2167 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
2168   if (view_)
2169     return view_->PreferredReadbackFormat();
2170   return kN32_SkColorType;
2171 }
2172
2173 }  // namespace content