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/message_loop/message_loop.h"
  18 #include "base/metrics/field_trial.h"
  19 #include "base/metrics/histogram.h"
  20 #include "base/strings/string_number_conversions.h"
  21 #include "base/strings/utf_string_conversions.h"
  22 #include "base/thread_task_runner_handle.h"
  23 #include "base/trace_event/trace_event.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/frame_metadata_util.h"
  36 #include "content/browser/renderer_host/input/input_router_config_helper.h"
  37 #include "content/browser/renderer_host/input/input_router_impl.h"
  38 #include "content/browser/renderer_host/input/synthetic_gesture.h"
  39 #include "content/browser/renderer_host/input/synthetic_gesture_controller.h"
  40 #include "content/browser/renderer_host/input/synthetic_gesture_target.h"
  41 #include "content/browser/renderer_host/input/timeout_monitor.h"
  42 #include "content/browser/renderer_host/input/touch_emulator.h"
  43 #include "content/browser/renderer_host/render_process_host_impl.h"
  44 #include "content/browser/renderer_host/render_view_host_impl.h"
  45 #include "content/browser/renderer_host/render_widget_helper.h"
  46 #include "content/browser/renderer_host/render_widget_host_delegate.h"
  47 #include "content/browser/renderer_host/render_widget_host_view_base.h"
  48 #include "content/browser/renderer_host/render_widget_resize_helper.h"
  49 #include "content/common/content_constants_internal.h"
  50 #include "content/common/cursors/webcursor.h"
  51 #include "content/common/frame_messages.h"
  52 #include "content/common/gpu/gpu_messages.h"
  53 #include "content/common/host_shared_bitmap_manager.h"
  54 #include "content/common/input_messages.h"
  55 #include "content/common/view_messages.h"
  56 #include "content/public/browser/native_web_keyboard_event.h"
  57 #include "content/public/browser/notification_service.h"
  58 #include "content/public/browser/notification_types.h"
  59 #include "content/public/browser/render_widget_host_iterator.h"
  60 #include "content/public/browser/user_metrics.h"
  61 #include "content/public/common/content_constants.h"
  62 #include "content/public/common/content_switches.h"
  63 #include "content/public/common/result_codes.h"
  64 #include "content/public/common/web_preferences.h"
  65 #include "gpu/GLES2/gl2extchromium.h"
  66 #include "gpu/command_buffer/service/gpu_switches.h"
  67 #include "skia/ext/image_operations.h"
  68 #include "skia/ext/platform_canvas.h"
  69 #include "third_party/WebKit/public/web/WebCompositionUnderline.h"
  70 #include "ui/events/event.h"
  71 #include "ui/events/keycodes/keyboard_codes.h"
  72 #include "ui/gfx/geometry/size_conversions.h"
  73 #include "ui/gfx/geometry/vector2d_conversions.h"
  74 #include "ui/gfx/skbitmap_operations.h"
  75 #include "ui/snapshot/snapshot.h"
  76
  77 #if defined(OS_WIN)
  78 #include "content/common/plugin_constants_win.h"
  79 #endif
  80
  81 using base::Time;
  82 using base::TimeDelta;
  83 using base::TimeTicks;
  84 using blink::WebGestureEvent;
  85 using blink::WebInputEvent;
  86 using blink::WebKeyboardEvent;
  87 using blink::WebMouseEvent;
  88 using blink::WebMouseWheelEvent;
  89 using blink::WebTextDirection;
  90
  91 namespace content {
  92 namespace {
  93
  94 bool g_check_for_pending_resize_ack = true;
  95
  96 typedef std::pair<int32, int32> RenderWidgetHostID;
  97 typedef base::hash_map<RenderWidgetHostID, RenderWidgetHostImpl*>
  98     RoutingIDWidgetMap;
  99 base::LazyInstance<RoutingIDWidgetMap> g_routing_id_widget_map =
 100     LAZY_INSTANCE_INITIALIZER;
 101
 102 int GetInputRouterViewFlagsFromCompositorFrameMetadata(
 103     const cc::CompositorFrameMetadata metadata) {
 104   int view_flags = InputRouter::VIEW_FLAGS_NONE;
 105
 106   if (metadata.min_page_scale_factor == metadata.max_page_scale_factor)
 107     view_flags |= InputRouter::FIXED_PAGE_SCALE;
 108
 109   const float window_width_dip = std::ceil(
 110       metadata.page_scale_factor * metadata.scrollable_viewport_size.width());
 111   const float content_width_css = metadata.root_layer_size.width();
 112   if (content_width_css <= window_width_dip)
 113     view_flags |= InputRouter::MOBILE_VIEWPORT;
 114
 115   return view_flags;
 116 }
 117
 118 // Implements the RenderWidgetHostIterator interface. It keeps a list of
 119 // RenderWidgetHosts, and makes sure it returns a live RenderWidgetHost at each
 120 // iteration (or NULL if there isn't any left).
 121 class RenderWidgetHostIteratorImpl : public RenderWidgetHostIterator {
 122  public:
 123   RenderWidgetHostIteratorImpl()
 124       : current_index_(0) {
 125   }
 126
 127   ~RenderWidgetHostIteratorImpl() override {}
 128
 129   void Add(RenderWidgetHost* host) {
 130     hosts_.push_back(RenderWidgetHostID(host->GetProcess()->GetID(),
 131                                         host->GetRoutingID()));
 132   }
 133
 134   // RenderWidgetHostIterator:
 135   RenderWidgetHost* GetNextHost() override {
 136     RenderWidgetHost* host = NULL;
 137     while (current_index_ < hosts_.size() && !host) {
 138       RenderWidgetHostID id = hosts_[current_index_];
 139       host = RenderWidgetHost::FromID(id.first, id.second);
 140       ++current_index_;
 141     }
 142     return host;
 143   }
 144
 145  private:
 146   std::vector<RenderWidgetHostID> hosts_;
 147   size_t current_index_;
 148
 149   DISALLOW_COPY_AND_ASSIGN(RenderWidgetHostIteratorImpl);
 150 };
 151
 152 }  // namespace
 153
 154 ///////////////////////////////////////////////////////////////////////////////
 155 // RenderWidgetHostImpl
 156
 157 RenderWidgetHostImpl::RenderWidgetHostImpl(RenderWidgetHostDelegate* delegate,
 158                                            RenderProcessHost* process,
 159                                            int routing_id,
 160                                            bool hidden)
 161     : view_(NULL),
 162       renderer_initialized_(false),
 163       hung_renderer_delay_ms_(kHungRendererDelayMs),
 164       delegate_(delegate),
 165       process_(process),
 166       routing_id_(routing_id),
 167       surface_id_(0),
 168       is_loading_(false),
 169       is_hidden_(hidden),
 170       repaint_ack_pending_(false),
 171       resize_ack_pending_(false),
 172       screen_info_out_of_date_(false),
 173       auto_resize_enabled_(false),
 174       waiting_for_screen_rects_ack_(false),
 175       needs_repainting_on_restore_(false),
 176       is_unresponsive_(false),
 177       in_flight_event_count_(0),
 178       in_get_backing_store_(false),
 179       ignore_input_events_(false),
 180       input_method_active_(false),
 181       text_direction_updated_(false),
 182       text_direction_(blink::WebTextDirectionLeftToRight),
 183       text_direction_canceled_(false),
 184       suppress_next_char_events_(false),
 185       pending_mouse_lock_request_(false),
 186       allow_privileged_mouse_lock_(false),
 187       has_touch_handler_(false),
 188       next_browser_snapshot_id_(1),
 189       owned_by_render_frame_host_(false),
 190       is_focused_(false),
 191       weak_factory_(this) {
 192   CHECK(delegate_);
 193   if (routing_id_ == MSG_ROUTING_NONE) {
 194     routing_id_ = process_->GetNextRoutingID();
 195     surface_id_ = GpuSurfaceTracker::Get()->AddSurfaceForRenderer(
 196         process_->GetID(),
 197         routing_id_);
 198   } else {
 199     // TODO(piman): This is a O(N) lookup, where we could forward the
 200     // information from the RenderWidgetHelper. The problem is that doing so
 201     // currently leaks outside of content all the way to chrome classes, and
 202     // would be a layering violation. Since we don't expect more than a few
 203     // hundreds of RWH, this seems acceptable. Revisit if performance become a
 204     // problem, for example by tracking in the RenderWidgetHelper the routing id
 205     // (and surface id) that have been created, but whose RWH haven't yet.
 206     surface_id_ = GpuSurfaceTracker::Get()->LookupSurfaceForRenderer(
 207         process_->GetID(),
 208         routing_id_);
 209     DCHECK(surface_id_);
 210   }
 211
 212   std::pair<RoutingIDWidgetMap::iterator, bool> result =
 213       g_routing_id_widget_map.Get().insert(std::make_pair(
 214           RenderWidgetHostID(process->GetID(), routing_id_), this));
 215   CHECK(result.second) << "Inserting a duplicate item!";
 216   process_->AddRoute(routing_id_, this);
 217
 218   // If we're initially visible, tell the process host that we're alive.
 219   // Otherwise we'll notify the process host when we are first shown.
 220   if (!hidden)
 221     process_->WidgetRestored();
 222
 223   latency_tracker_.Initialize(routing_id_, GetProcess()->GetID());
 224
 225   input_router_.reset(new InputRouterImpl(
 226       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
 227
 228   touch_emulator_.reset();
 229
 230   RenderViewHostImpl* rvh = static_cast<RenderViewHostImpl*>(
 231       IsRenderView() ? RenderViewHost::From(this) : NULL);
 232   if (BrowserPluginGuest::IsGuest(rvh) ||
 233       !base::CommandLine::ForCurrentProcess()->HasSwitch(
 234           switches::kDisableHangMonitor)) {
 235     hang_monitor_timeout_.reset(new TimeoutMonitor(
 236         base::Bind(&RenderWidgetHostImpl::RendererIsUnresponsive,
 237                    weak_factory_.GetWeakPtr())));
 238   }
 239 }
 240
 241 RenderWidgetHostImpl::~RenderWidgetHostImpl() {
 242   if (view_weak_)
 243     view_weak_->RenderWidgetHostGone();
 244   SetView(NULL);
 245
 246   GpuSurfaceTracker::Get()->RemoveSurface(surface_id_);
 247   surface_id_ = 0;
 248
 249   process_->RemoveRoute(routing_id_);
 250   g_routing_id_widget_map.Get().erase(
 251       RenderWidgetHostID(process_->GetID(), routing_id_));
 252
 253   if (delegate_)
 254     delegate_->RenderWidgetDeleted(this);
 255 }
 256
 257 // static
 258 RenderWidgetHost* RenderWidgetHost::FromID(
 259     int32 process_id,
 260     int32 routing_id) {
 261   return RenderWidgetHostImpl::FromID(process_id, routing_id);
 262 }
 263
 264 // static
 265 RenderWidgetHostImpl* RenderWidgetHostImpl::FromID(
 266     int32 process_id,
 267     int32 routing_id) {
 268   DCHECK_CURRENTLY_ON(BrowserThread::UI);
 269   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 270   RoutingIDWidgetMap::iterator it = widgets->find(
 271       RenderWidgetHostID(process_id, routing_id));
 272   return it == widgets->end() ? NULL : it->second;
 273 }
 274
 275 // static
 276 scoped_ptr<RenderWidgetHostIterator> RenderWidgetHost::GetRenderWidgetHosts() {
 277   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 278   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 279   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 280        it != widgets->end();
 281        ++it) {
 282     RenderWidgetHost* widget = it->second;
 283
 284     if (!widget->IsRenderView()) {
 285       hosts->Add(widget);
 286       continue;
 287     }
 288
 289     // Add only active RenderViewHosts.
 290     RenderViewHost* rvh = RenderViewHost::From(widget);
 291     if (static_cast<RenderViewHostImpl*>(rvh)->is_active())
 292       hosts->Add(widget);
 293   }
 294
 295   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 296 }
 297
 298 // static
 299 scoped_ptr<RenderWidgetHostIterator>
 300 RenderWidgetHostImpl::GetAllRenderWidgetHosts() {
 301   RenderWidgetHostIteratorImpl* hosts = new RenderWidgetHostIteratorImpl();
 302   RoutingIDWidgetMap* widgets = g_routing_id_widget_map.Pointer();
 303   for (RoutingIDWidgetMap::const_iterator it = widgets->begin();
 304        it != widgets->end();
 305        ++it) {
 306     hosts->Add(it->second);
 307   }
 308
 309   return scoped_ptr<RenderWidgetHostIterator>(hosts);
 310 }
 311
 312 // static
 313 RenderWidgetHostImpl* RenderWidgetHostImpl::From(RenderWidgetHost* rwh) {
 314   return rwh->AsRenderWidgetHostImpl();
 315 }
 316
 317 void RenderWidgetHostImpl::SetView(RenderWidgetHostViewBase* view) {
 318   if (view)
 319     view_weak_ = view->GetWeakPtr();
 320   else
 321     view_weak_.reset();
 322   view_ = view;
 323
 324   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 325       surface_id_, GetCompositingSurface());
 326
 327   synthetic_gesture_controller_.reset();
 328 }
 329
 330 RenderProcessHost* RenderWidgetHostImpl::GetProcess() const {
 331   return process_;
 332 }
 333
 334 int RenderWidgetHostImpl::GetRoutingID() const {
 335   return routing_id_;
 336 }
 337
 338 RenderWidgetHostView* RenderWidgetHostImpl::GetView() const {
 339   return view_;
 340 }
 341
 342 RenderWidgetHostImpl* RenderWidgetHostImpl::AsRenderWidgetHostImpl() {
 343   return this;
 344 }
 345
 346 gfx::NativeViewId RenderWidgetHostImpl::GetNativeViewId() const {
 347   if (view_)
 348     return view_->GetNativeViewId();
 349   return 0;
 350 }
 351
 352 gfx::GLSurfaceHandle RenderWidgetHostImpl::GetCompositingSurface() {
 353   if (view_)
 354     return view_->GetCompositingSurface();
 355   return gfx::GLSurfaceHandle();
 356 }
 357
 358 void RenderWidgetHostImpl::ResetSizeAndRepaintPendingFlags() {
 359   resize_ack_pending_ = false;
 360   if (repaint_ack_pending_) {
 361     TRACE_EVENT_ASYNC_END0(
 362         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 363   }
 364   repaint_ack_pending_ = false;
 365   if (old_resize_params_)
 366     old_resize_params_->new_size = gfx::Size();
 367 }
 368
 369 void RenderWidgetHostImpl::SendScreenRects() {
 370   if (!renderer_initialized_ || waiting_for_screen_rects_ack_)
 371     return;
 372
 373   if (is_hidden_) {
 374     // On GTK, this comes in for backgrounded tabs. Ignore, to match what
 375     // happens on Win & Mac, and when the view is shown it'll call this again.
 376     return;
 377   }
 378
 379   if (!view_)
 380     return;
 381
 382   last_view_screen_rect_ = view_->GetViewBounds();
 383   last_window_screen_rect_ = view_->GetBoundsInRootWindow();
 384   Send(new ViewMsg_UpdateScreenRects(
 385       GetRoutingID(), last_view_screen_rect_, last_window_screen_rect_));
 386   if (delegate_)
 387     delegate_->DidSendScreenRects(this);
 388   waiting_for_screen_rects_ack_ = true;
 389 }
 390
 391 void RenderWidgetHostImpl::SuppressNextCharEvents() {
 392   suppress_next_char_events_ = true;
 393 }
 394
 395 void RenderWidgetHostImpl::FlushInput() {
 396   input_router_->Flush();
 397   if (synthetic_gesture_controller_)
 398     synthetic_gesture_controller_->Flush(base::TimeTicks::Now());
 399 }
 400
 401 void RenderWidgetHostImpl::SetNeedsFlush() {
 402   if (view_)
 403     view_->OnSetNeedsFlushInput();
 404 }
 405
 406 void RenderWidgetHostImpl::Init() {
 407   DCHECK(process_->HasConnection());
 408
 409   renderer_initialized_ = true;
 410
 411   GpuSurfaceTracker::Get()->SetSurfaceHandle(
 412       surface_id_, GetCompositingSurface());
 413
 414   // Send the ack along with the information on placement.
 415   Send(new ViewMsg_CreatingNew_ACK(routing_id_));
 416   GetProcess()->ResumeRequestsForView(routing_id_);
 417
 418   WasResized();
 419 }
 420
 421 void RenderWidgetHostImpl::InitForFrame() {
 422   DCHECK(process_->HasConnection());
 423   renderer_initialized_ = true;
 424 }
 425
 426 void RenderWidgetHostImpl::Shutdown() {
 427   RejectMouseLockOrUnlockIfNecessary();
 428
 429   if (process_->HasConnection()) {
 430     // Tell the renderer object to close.
 431     bool rv = Send(new ViewMsg_Close(routing_id_));
 432     DCHECK(rv);
 433   }
 434
 435   Destroy();
 436 }
 437
 438 bool RenderWidgetHostImpl::IsLoading() const {
 439   return is_loading_;
 440 }
 441
 442 bool RenderWidgetHostImpl::IsRenderView() const {
 443   return false;
 444 }
 445
 446 bool RenderWidgetHostImpl::OnMessageReceived(const IPC::Message &msg) {
 447   bool handled = true;
 448   IPC_BEGIN_MESSAGE_MAP(RenderWidgetHostImpl, msg)
 449     IPC_MESSAGE_HANDLER(FrameHostMsg_RenderProcessGone, OnRenderProcessGone)
 450     IPC_MESSAGE_HANDLER(InputHostMsg_QueueSyntheticGesture,
 451                         OnQueueSyntheticGesture)
 452     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCancelComposition,
 453                         OnImeCancelComposition)
 454     IPC_MESSAGE_HANDLER(ViewHostMsg_RenderViewReady, OnRenderViewReady)
 455     IPC_MESSAGE_HANDLER(ViewHostMsg_Close, OnClose)
 456     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateScreenRects_ACK,
 457                         OnUpdateScreenRectsAck)
 458     IPC_MESSAGE_HANDLER(ViewHostMsg_RequestMove, OnRequestMove)
 459     IPC_MESSAGE_HANDLER(ViewHostMsg_SetTooltipText, OnSetTooltipText)
 460     IPC_MESSAGE_HANDLER_GENERIC(ViewHostMsg_SwapCompositorFrame,
 461                                 OnSwapCompositorFrame(msg))
 462     IPC_MESSAGE_HANDLER(ViewHostMsg_DidStopFlinging, OnFlingingStopped)
 463     IPC_MESSAGE_HANDLER(ViewHostMsg_UpdateRect, OnUpdateRect)
 464     IPC_MESSAGE_HANDLER(ViewHostMsg_Focus, OnFocus)
 465     IPC_MESSAGE_HANDLER(ViewHostMsg_Blur, OnBlur)
 466     IPC_MESSAGE_HANDLER(ViewHostMsg_SetCursor, OnSetCursor)
 467     IPC_MESSAGE_HANDLER(ViewHostMsg_TextInputTypeChanged,
 468                         OnTextInputTypeChanged)
 469     IPC_MESSAGE_HANDLER(ViewHostMsg_LockMouse, OnLockMouse)
 470     IPC_MESSAGE_HANDLER(ViewHostMsg_UnlockMouse, OnUnlockMouse)
 471     IPC_MESSAGE_HANDLER(ViewHostMsg_ShowDisambiguationPopup,
 472                         OnShowDisambiguationPopup)
 473     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionChanged, OnSelectionChanged)
 474     IPC_MESSAGE_HANDLER(ViewHostMsg_SelectionBoundsChanged,
 475                         OnSelectionBoundsChanged)
 476 #if defined(OS_WIN)
 477     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowCreated,
 478                         OnWindowlessPluginDummyWindowCreated)
 479     IPC_MESSAGE_HANDLER(ViewHostMsg_WindowlessPluginDummyWindowDestroyed,
 480                         OnWindowlessPluginDummyWindowDestroyed)
 481 #endif
 482     IPC_MESSAGE_HANDLER(InputHostMsg_ImeCompositionRangeChanged,
 483                         OnImeCompositionRangeChanged)
 484     IPC_MESSAGE_UNHANDLED(handled = false)
 485   IPC_END_MESSAGE_MAP()
 486
 487   if (!handled && input_router_ && input_router_->OnMessageReceived(msg))
 488     return true;
 489
 490   if (!handled && view_ && view_->OnMessageReceived(msg))
 491     return true;
 492
 493   return handled;
 494 }
 495
 496 bool RenderWidgetHostImpl::Send(IPC::Message* msg) {
 497   if (IPC_MESSAGE_ID_CLASS(msg->type()) == InputMsgStart)
 498     return input_router_->SendInput(make_scoped_ptr(msg));
 499
 500   return process_->Send(msg);
 501 }
 502
 503 void RenderWidgetHostImpl::SetIsLoading(bool is_loading) {
 504   is_loading_ = is_loading;
 505   if (!view_)
 506     return;
 507   view_->SetIsLoading(is_loading);
 508 }
 509
 510 void RenderWidgetHostImpl::WasHidden() {
 511   if (is_hidden_)
 512     return;
 513
 514   is_hidden_ = true;
 515
 516   // Don't bother reporting hung state when we aren't active.
 517   StopHangMonitorTimeout();
 518
 519   // If we have a renderer, then inform it that we are being hidden so it can
 520   // reduce its resource utilization.
 521   Send(new ViewMsg_WasHidden(routing_id_));
 522
 523   // Tell the RenderProcessHost we were hidden.
 524   process_->WidgetHidden();
 525
 526   bool is_visible = false;
 527   NotificationService::current()->Notify(
 528       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 529       Source<RenderWidgetHost>(this),
 530       Details<bool>(&is_visible));
 531 }
 532
 533 void RenderWidgetHostImpl::WasShown(const ui::LatencyInfo& latency_info) {
 534   if (!is_hidden_)
 535     return;
 536   is_hidden_ = false;
 537
 538   SendScreenRects();
 539
 540   // Always repaint on restore.
 541   bool needs_repainting = true;
 542   needs_repainting_on_restore_ = false;
 543   Send(new ViewMsg_WasShown(routing_id_, needs_repainting, latency_info));
 544
 545   process_->WidgetRestored();
 546
 547   bool is_visible = true;
 548   NotificationService::current()->Notify(
 549       NOTIFICATION_RENDER_WIDGET_VISIBILITY_CHANGED,
 550       Source<RenderWidgetHost>(this),
 551       Details<bool>(&is_visible));
 552
 553   // It's possible for our size to be out of sync with the renderer. The
 554   // following is one case that leads to this:
 555   // 1. WasResized -> Send ViewMsg_Resize to render
 556   // 2. WasResized -> do nothing as resize_ack_pending_ is true
 557   // 3. WasHidden
 558   // 4. OnUpdateRect from (1) processed. Does NOT invoke WasResized as view
 559   //    is hidden. Now renderer/browser out of sync with what they think size
 560   //    is.
 561   // By invoking WasResized the renderer is updated as necessary. WasResized
 562   // does nothing if the sizes are already in sync.
 563   //
 564   // TODO: ideally ViewMsg_WasShown would take a size. This way, the renderer
 565   // could handle both the restore and resize at once. This isn't that big a
 566   // deal as RenderWidget::WasShown delays updating, so that the resize from
 567   // WasResized is usually processed before the renderer is painted.
 568   WasResized();
 569 }
 570
 571 bool RenderWidgetHostImpl::GetResizeParams(
 572     ViewMsg_Resize_Params* resize_params) {
 573   *resize_params = ViewMsg_Resize_Params();
 574
 575   if (!screen_info_) {
 576     screen_info_.reset(new blink::WebScreenInfo);
 577     GetWebScreenInfo(screen_info_.get());
 578   }
 579   resize_params->screen_info = *screen_info_;
 580   resize_params->resizer_rect = GetRootWindowResizerRect();
 581
 582   if (view_) {
 583     resize_params->new_size = view_->GetRequestedRendererSize();
 584     resize_params->physical_backing_size = view_->GetPhysicalBackingSize();
 585     resize_params->top_controls_height = view_->GetTopControlsHeight();
 586     resize_params->top_controls_shrink_blink_size =
 587         view_->DoTopControlsShrinkBlinkSize();
 588     resize_params->visible_viewport_size = view_->GetVisibleViewportSize();
 589     resize_params->is_fullscreen = IsFullscreen();
 590   }
 591
 592   const bool size_changed =
 593       !old_resize_params_ ||
 594       old_resize_params_->new_size != resize_params->new_size ||
 595       (old_resize_params_->physical_backing_size.IsEmpty() &&
 596        !resize_params->physical_backing_size.IsEmpty());
 597   bool dirty =
 598       size_changed || screen_info_out_of_date_ ||
 599       old_resize_params_->physical_backing_size !=
 600           resize_params->physical_backing_size ||
 601       old_resize_params_->is_fullscreen != resize_params->is_fullscreen ||
 602       old_resize_params_->top_controls_height !=
 603           resize_params->top_controls_height ||
 604       old_resize_params_->top_controls_shrink_blink_size !=
 605           resize_params->top_controls_shrink_blink_size ||
 606       old_resize_params_->visible_viewport_size !=
 607           resize_params->visible_viewport_size;
 608
 609   // We don't expect to receive an ACK when the requested size or the physical
 610   // backing size is empty, or when the main viewport size didn't change.
 611   resize_params->needs_resize_ack =
 612       g_check_for_pending_resize_ack && !resize_params->new_size.IsEmpty() &&
 613       !resize_params->physical_backing_size.IsEmpty() && size_changed;
 614
 615   return dirty;
 616 }
 617
 618 void RenderWidgetHostImpl::SetInitialRenderSizeParams(
 619     const ViewMsg_Resize_Params& resize_params) {
 620   resize_ack_pending_ = resize_params.needs_resize_ack;
 621
 622   old_resize_params_ =
 623       make_scoped_ptr(new ViewMsg_Resize_Params(resize_params));
 624 }
 625
 626 void RenderWidgetHostImpl::WasResized() {
 627   // Skip if the |delegate_| has already been detached because
 628   // it's web contents is being deleted.
 629   if (resize_ack_pending_ || !process_->HasConnection() || !view_ ||
 630       !renderer_initialized_ || auto_resize_enabled_ || !delegate_) {
 631     return;
 632   }
 633
 634   scoped_ptr<ViewMsg_Resize_Params> params(new ViewMsg_Resize_Params);
 635   if (!GetResizeParams(params.get()))
 636     return;
 637
 638   bool width_changed =
 639       !old_resize_params_ ||
 640       old_resize_params_->new_size.width() != params->new_size.width();
 641   if (Send(new ViewMsg_Resize(routing_id_, *params))) {
 642     resize_ack_pending_ = params->needs_resize_ack;
 643     old_resize_params_.swap(params);
 644   }
 645
 646   if (delegate_)
 647     delegate_->RenderWidgetWasResized(this, width_changed);
 648 }
 649
 650 void RenderWidgetHostImpl::ResizeRectChanged(const gfx::Rect& new_rect) {
 651   Send(new ViewMsg_ChangeResizeRect(routing_id_, new_rect));
 652 }
 653
 654 void RenderWidgetHostImpl::GotFocus() {
 655   Focus();
 656   if (delegate_)
 657     delegate_->RenderWidgetGotFocus(this);
 658 }
 659
 660 void RenderWidgetHostImpl::Focus() {
 661   is_focused_ = true;
 662
 663   Send(new InputMsg_SetFocus(routing_id_, true));
 664 }
 665
 666 void RenderWidgetHostImpl::Blur() {
 667   is_focused_ = false;
 668
 669   // If there is a pending mouse lock request, we don't want to reject it at
 670   // this point. The user can switch focus back to this view and approve the
 671   // request later.
 672   if (IsMouseLocked())
 673     view_->UnlockMouse();
 674
 675   if (touch_emulator_)
 676     touch_emulator_->CancelTouch();
 677
 678   Send(new InputMsg_SetFocus(routing_id_, false));
 679 }
 680
 681 void RenderWidgetHostImpl::LostCapture() {
 682   if (touch_emulator_)
 683     touch_emulator_->CancelTouch();
 684
 685   Send(new InputMsg_MouseCaptureLost(routing_id_));
 686 }
 687
 688 void RenderWidgetHostImpl::SetActive(bool active) {
 689   Send(new ViewMsg_SetActive(routing_id_, active));
 690 }
 691
 692 void RenderWidgetHostImpl::LostMouseLock() {
 693   Send(new ViewMsg_MouseLockLost(routing_id_));
 694 }
 695
 696 void RenderWidgetHostImpl::ViewDestroyed() {
 697   RejectMouseLockOrUnlockIfNecessary();
 698
 699   // TODO(evanm): tracking this may no longer be necessary;
 700   // eliminate this function if so.
 701   SetView(NULL);
 702 }
 703
 704 void RenderWidgetHostImpl::CopyFromBackingStore(
 705     const gfx::Rect& src_subrect,
 706     const gfx::Size& accelerated_dst_size,
 707     ReadbackRequestCallback& callback,
 708     const SkColorType color_type) {
 709   if (view_) {
 710     TRACE_EVENT0("browser",
 711         "RenderWidgetHostImpl::CopyFromBackingStore::FromCompositingSurface");
 712     gfx::Rect accelerated_copy_rect = src_subrect.IsEmpty() ?
 713         gfx::Rect(view_->GetViewBounds().size()) : src_subrect;
 714     view_->CopyFromCompositingSurface(
 715         accelerated_copy_rect, accelerated_dst_size, callback, color_type);
 716     return;
 717   }
 718
 719   callback.Run(SkBitmap(), content::READBACK_FAILED);
 720 }
 721
 722 bool RenderWidgetHostImpl::CanCopyFromBackingStore() {
 723   if (view_)
 724     return view_->IsSurfaceAvailableForCopy();
 725   return false;
 726 }
 727
 728 #if defined(OS_ANDROID)
 729 void RenderWidgetHostImpl::LockBackingStore() {
 730   if (view_)
 731     view_->LockCompositingSurface();
 732 }
 733
 734 void RenderWidgetHostImpl::UnlockBackingStore() {
 735   if (view_)
 736     view_->UnlockCompositingSurface();
 737 }
 738 #endif
 739
 740 #if defined(OS_MACOSX)
 741 void RenderWidgetHostImpl::PauseForPendingResizeOrRepaints() {
 742   TRACE_EVENT0("browser",
 743       "RenderWidgetHostImpl::PauseForPendingResizeOrRepaints");
 744
 745   if (!CanPauseForPendingResizeOrRepaints())
 746     return;
 747
 748   WaitForSurface();
 749 }
 750
 751 bool RenderWidgetHostImpl::CanPauseForPendingResizeOrRepaints() {
 752   // Do not pause if the view is hidden.
 753   if (is_hidden())
 754     return false;
 755
 756   // Do not pause if there is not a paint or resize already coming.
 757   if (!repaint_ack_pending_ && !resize_ack_pending_)
 758     return false;
 759
 760   return true;
 761 }
 762
 763 void RenderWidgetHostImpl::WaitForSurface() {
 764   // How long to (synchronously) wait for the renderer to respond with a
 765   // new frame when our current frame doesn't exist or is the wrong size.
 766   // This timeout impacts the "choppiness" of our window resize.
 767   const int kPaintMsgTimeoutMS = 50;
 768
 769   if (!view_)
 770     return;
 771
 772   // The view_size will be current_size_ for auto-sized views and otherwise the
 773   // size of the view_. (For auto-sized views, current_size_ is updated during
 774   // UpdateRect messages.)
 775   gfx::Size view_size = current_size_;
 776   if (!auto_resize_enabled_) {
 777     // Get the desired size from the current view bounds.
 778     gfx::Rect view_rect = view_->GetViewBounds();
 779     if (view_rect.IsEmpty())
 780       return;
 781     view_size = view_rect.size();
 782   }
 783
 784   TRACE_EVENT2("renderer_host",
 785                "RenderWidgetHostImpl::WaitForSurface",
 786                "width",
 787                base::IntToString(view_size.width()),
 788                "height",
 789                base::IntToString(view_size.height()));
 790
 791   // We should not be asked to paint while we are hidden.  If we are hidden,
 792   // then it means that our consumer failed to call WasShown.
 793   DCHECK(!is_hidden_) << "WaitForSurface called while hidden!";
 794
 795   // We should never be called recursively; this can theoretically lead to
 796   // infinite recursion and almost certainly leads to lower performance.
 797   DCHECK(!in_get_backing_store_) << "WaitForSurface called recursively!";
 798   base::AutoReset<bool> auto_reset_in_get_backing_store(
 799       &in_get_backing_store_, true);
 800
 801   // We might have a surface that we can use already.
 802   if (view_->HasAcceleratedSurface(view_size))
 803     return;
 804
 805   // Request that the renderer produce a frame of the right size, if it
 806   // hasn't been requested already.
 807   if (!repaint_ack_pending_ && !resize_ack_pending_) {
 808     repaint_start_time_ = TimeTicks::Now();
 809     repaint_ack_pending_ = true;
 810     TRACE_EVENT_ASYNC_BEGIN0(
 811         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 812     Send(new ViewMsg_Repaint(routing_id_, view_size));
 813   }
 814
 815   // Pump a nested message loop until we time out or get a frame of the right
 816   // size.
 817   TimeTicks start_time = TimeTicks::Now();
 818   TimeDelta time_left = TimeDelta::FromMilliseconds(kPaintMsgTimeoutMS);
 819   TimeTicks timeout_time = start_time + time_left;
 820   while (1) {
 821     TRACE_EVENT0("renderer_host", "WaitForSurface::WaitForSingleTaskToRun");
 822     if (RenderWidgetResizeHelper::Get()->WaitForSingleTaskToRun(time_left)) {
 823       // For auto-resized views, current_size_ determines the view_size and it
 824       // may have changed during the handling of an UpdateRect message.
 825       if (auto_resize_enabled_)
 826         view_size = current_size_;
 827       if (view_->HasAcceleratedSurface(view_size))
 828         break;
 829     }
 830     time_left = timeout_time - TimeTicks::Now();
 831     if (time_left <= TimeDelta::FromSeconds(0)) {
 832       TRACE_EVENT0("renderer_host", "WaitForSurface::Timeout");
 833       break;
 834     }
 835   }
 836
 837   UMA_HISTOGRAM_CUSTOM_TIMES("OSX.RendererHost.SurfaceWaitTime",
 838                              TimeTicks::Now() - start_time,
 839                              TimeDelta::FromMilliseconds(1),
 840                              TimeDelta::FromMilliseconds(200), 50);
 841 }
 842 #endif
 843
 844 bool RenderWidgetHostImpl::ScheduleComposite() {
 845   if (is_hidden_ || current_size_.IsEmpty() || repaint_ack_pending_ ||
 846       resize_ack_pending_) {
 847     return false;
 848   }
 849
 850   // Send out a request to the renderer to paint the view if required.
 851   repaint_start_time_ = TimeTicks::Now();
 852   repaint_ack_pending_ = true;
 853   TRACE_EVENT_ASYNC_BEGIN0(
 854       "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
 855   Send(new ViewMsg_Repaint(routing_id_, current_size_));
 856   return true;
 857 }
 858
 859 void RenderWidgetHostImpl::StartHangMonitorTimeout(base::TimeDelta delay) {
 860   if (hang_monitor_timeout_)
 861     hang_monitor_timeout_->Start(delay);
 862 }
 863
 864 void RenderWidgetHostImpl::RestartHangMonitorTimeout() {
 865   if (hang_monitor_timeout_)
 866     hang_monitor_timeout_->Restart(
 867         base::TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
 868 }
 869
 870 void RenderWidgetHostImpl::StopHangMonitorTimeout() {
 871   if (hang_monitor_timeout_)
 872     hang_monitor_timeout_->Stop();
 873   RendererIsResponsive();
 874 }
 875
 876 void RenderWidgetHostImpl::ForwardMouseEvent(const WebMouseEvent& mouse_event) {
 877   ForwardMouseEventWithLatencyInfo(mouse_event, ui::LatencyInfo());
 878 }
 879
 880 void RenderWidgetHostImpl::ForwardMouseEventWithLatencyInfo(
 881       const blink::WebMouseEvent& mouse_event,
 882       const ui::LatencyInfo& ui_latency) {
 883   TRACE_EVENT2("input", "RenderWidgetHostImpl::ForwardMouseEvent",
 884                "x", mouse_event.x, "y", mouse_event.y);
 885
 886   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
 887     if (mouse_event_callbacks_[i].Run(mouse_event))
 888       return;
 889   }
 890
 891   if (IgnoreInputEvents())
 892     return;
 893
 894   if (touch_emulator_ && touch_emulator_->HandleMouseEvent(mouse_event))
 895     return;
 896
 897   MouseEventWithLatencyInfo mouse_with_latency(mouse_event, ui_latency);
 898   latency_tracker_.OnInputEvent(mouse_event, &mouse_with_latency.latency);
 899   input_router_->SendMouseEvent(mouse_with_latency);
 900
 901   // Pass mouse state to gpu service if the subscribe uniform
 902   // extension is enabled.
 903   if (process_->SubscribeUniformEnabled()) {
 904     gpu::ValueState state;
 905     state.int_value[0] = mouse_event.x;
 906     state.int_value[1] = mouse_event.y;
 907     // TODO(orglofch) Separate the mapping of pending value states to the
 908     // Gpu Service to be per RWH not per process
 909     process_->SendUpdateValueState(GL_MOUSE_POSITION_CHROMIUM, state);
 910   }
 911 }
 912
 913 void RenderWidgetHostImpl::OnPointerEventActivate() {
 914 }
 915
 916 void RenderWidgetHostImpl::ForwardWheelEvent(
 917     const WebMouseWheelEvent& wheel_event) {
 918   ForwardWheelEventWithLatencyInfo(wheel_event, ui::LatencyInfo());
 919 }
 920
 921 void RenderWidgetHostImpl::ForwardWheelEventWithLatencyInfo(
 922       const blink::WebMouseWheelEvent& wheel_event,
 923       const ui::LatencyInfo& ui_latency) {
 924   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardWheelEvent");
 925
 926   if (IgnoreInputEvents())
 927     return;
 928
 929   if (touch_emulator_ && touch_emulator_->HandleMouseWheelEvent(wheel_event))
 930     return;
 931
 932   MouseWheelEventWithLatencyInfo wheel_with_latency(wheel_event, ui_latency);
 933   latency_tracker_.OnInputEvent(wheel_event, &wheel_with_latency.latency);
 934   input_router_->SendWheelEvent(wheel_with_latency);
 935 }
 936
 937 void RenderWidgetHostImpl::ForwardGestureEvent(
 938     const blink::WebGestureEvent& gesture_event) {
 939   ForwardGestureEventWithLatencyInfo(gesture_event, ui::LatencyInfo());
 940 }
 941
 942 void RenderWidgetHostImpl::ForwardGestureEventWithLatencyInfo(
 943     const blink::WebGestureEvent& gesture_event,
 944     const ui::LatencyInfo& ui_latency) {
 945   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardGestureEvent");
 946   // Early out if necessary, prior to performing latency logic.
 947   if (IgnoreInputEvents())
 948     return;
 949
 950   if (delegate_->PreHandleGestureEvent(gesture_event))
 951     return;
 952
 953   GestureEventWithLatencyInfo gesture_with_latency(gesture_event, ui_latency);
 954   latency_tracker_.OnInputEvent(gesture_event, &gesture_with_latency.latency);
 955   input_router_->SendGestureEvent(gesture_with_latency);
 956 }
 957
 958 void RenderWidgetHostImpl::ForwardEmulatedTouchEvent(
 959       const blink::WebTouchEvent& touch_event) {
 960   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardEmulatedTouchEvent");
 961
 962   TouchEventWithLatencyInfo touch_with_latency(touch_event);
 963   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 964   input_router_->SendTouchEvent(touch_with_latency);
 965 }
 966
 967 void RenderWidgetHostImpl::ForwardTouchEventWithLatencyInfo(
 968       const blink::WebTouchEvent& touch_event,
 969       const ui::LatencyInfo& ui_latency) {
 970   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardTouchEvent");
 971
 972   // Always forward TouchEvents for touch stream consistency. They will be
 973   // ignored if appropriate in FilterInputEvent().
 974
 975   TouchEventWithLatencyInfo touch_with_latency(touch_event, ui_latency);
 976   if (touch_emulator_ &&
 977       touch_emulator_->HandleTouchEvent(touch_with_latency.event)) {
 978     if (view_) {
 979       view_->ProcessAckedTouchEvent(
 980           touch_with_latency, INPUT_EVENT_ACK_STATE_CONSUMED);
 981     }
 982     return;
 983   }
 984
 985   latency_tracker_.OnInputEvent(touch_event, &touch_with_latency.latency);
 986   input_router_->SendTouchEvent(touch_with_latency);
 987 }
 988
 989 void RenderWidgetHostImpl::ForwardKeyboardEvent(
 990     const NativeWebKeyboardEvent& key_event) {
 991   TRACE_EVENT0("input", "RenderWidgetHostImpl::ForwardKeyboardEvent");
 992   if (IgnoreInputEvents())
 993     return;
 994
 995   if (!process_->HasConnection())
 996     return;
 997
 998   // First, let keypress listeners take a shot at handling the event.  If a
 999   // listener handles the event, it should not be propagated to the renderer.
1000   if (KeyPressListenersHandleEvent(key_event)) {
1001     // Some keypresses that are accepted by the listener might have follow up
1002     // char events, which should be ignored.
1003     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1004       suppress_next_char_events_ = true;
1005     return;
1006   }
1007
1008   if (key_event.type == WebKeyboardEvent::Char &&
1009       (key_event.windowsKeyCode == ui::VKEY_RETURN ||
1010        key_event.windowsKeyCode == ui::VKEY_SPACE)) {
1011     OnUserGesture();
1012   }
1013
1014   // Double check the type to make sure caller hasn't sent us nonsense that
1015   // will mess up our key queue.
1016   if (!WebInputEvent::isKeyboardEventType(key_event.type))
1017     return;
1018
1019   if (suppress_next_char_events_) {
1020     // If preceding RawKeyDown event was handled by the browser, then we need
1021     // suppress all Char events generated by it. Please note that, one
1022     // RawKeyDown event may generate multiple Char events, so we can't reset
1023     // |suppress_next_char_events_| until we get a KeyUp or a RawKeyDown.
1024     if (key_event.type == WebKeyboardEvent::Char)
1025       return;
1026     // We get a KeyUp or a RawKeyDown event.
1027     suppress_next_char_events_ = false;
1028   }
1029
1030   bool is_shortcut = false;
1031
1032   // Only pre-handle the key event if it's not handled by the input method.
1033   if (delegate_ && !key_event.skip_in_browser) {
1034     // We need to set |suppress_next_char_events_| to true if
1035     // PreHandleKeyboardEvent() returns true, but |this| may already be
1036     // destroyed at that time. So set |suppress_next_char_events_| true here,
1037     // then revert it afterwards when necessary.
1038     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1039       suppress_next_char_events_ = true;
1040
1041     // Tab switching/closing accelerators aren't sent to the renderer to avoid
1042     // a hung/malicious renderer from interfering.
1043     if (delegate_->PreHandleKeyboardEvent(key_event, &is_shortcut))
1044       return;
1045
1046     if (key_event.type == WebKeyboardEvent::RawKeyDown)
1047       suppress_next_char_events_ = false;
1048   }
1049
1050   if (touch_emulator_ && touch_emulator_->HandleKeyboardEvent(key_event))
1051     return;
1052
1053   ui::LatencyInfo latency;
1054   latency_tracker_.OnInputEvent(key_event, &latency);
1055   input_router_->SendKeyboardEvent(key_event, latency, is_shortcut);
1056 }
1057
1058 void RenderWidgetHostImpl::QueueSyntheticGesture(
1059     scoped_ptr<SyntheticGesture> synthetic_gesture,
1060     const base::Callback<void(SyntheticGesture::Result)>& on_complete) {
1061   if (!synthetic_gesture_controller_ && view_) {
1062     synthetic_gesture_controller_.reset(
1063         new SyntheticGestureController(
1064             view_->CreateSyntheticGestureTarget().Pass()));
1065   }
1066   if (synthetic_gesture_controller_) {
1067     synthetic_gesture_controller_->QueueSyntheticGesture(
1068         synthetic_gesture.Pass(), on_complete);
1069   }
1070 }
1071
1072 void RenderWidgetHostImpl::SetCursor(const WebCursor& cursor) {
1073   if (!view_)
1074     return;
1075   view_->UpdateCursor(cursor);
1076 }
1077
1078 void RenderWidgetHostImpl::ShowContextMenuAtPoint(const gfx::Point& point) {
1079   Send(new ViewMsg_ShowContextMenu(
1080       GetRoutingID(), ui::MENU_SOURCE_MOUSE, point));
1081 }
1082
1083 void RenderWidgetHostImpl::SendCursorVisibilityState(bool is_visible) {
1084   Send(new InputMsg_CursorVisibilityChange(GetRoutingID(), is_visible));
1085 }
1086
1087 int64 RenderWidgetHostImpl::GetLatencyComponentId() const {
1088   return latency_tracker_.latency_component_id();
1089 }
1090
1091 // static
1092 void RenderWidgetHostImpl::DisableResizeAckCheckForTesting() {
1093   g_check_for_pending_resize_ack = false;
1094 }
1095
1096 void RenderWidgetHostImpl::AddKeyPressEventCallback(
1097     const KeyPressEventCallback& callback) {
1098   key_press_event_callbacks_.push_back(callback);
1099 }
1100
1101 void RenderWidgetHostImpl::RemoveKeyPressEventCallback(
1102     const KeyPressEventCallback& callback) {
1103   for (size_t i = 0; i < key_press_event_callbacks_.size(); ++i) {
1104     if (key_press_event_callbacks_[i].Equals(callback)) {
1105       key_press_event_callbacks_.erase(
1106           key_press_event_callbacks_.begin() + i);
1107       return;
1108     }
1109   }
1110 }
1111
1112 void RenderWidgetHostImpl::AddMouseEventCallback(
1113     const MouseEventCallback& callback) {
1114   mouse_event_callbacks_.push_back(callback);
1115 }
1116
1117 void RenderWidgetHostImpl::RemoveMouseEventCallback(
1118     const MouseEventCallback& callback) {
1119   for (size_t i = 0; i < mouse_event_callbacks_.size(); ++i) {
1120     if (mouse_event_callbacks_[i].Equals(callback)) {
1121       mouse_event_callbacks_.erase(mouse_event_callbacks_.begin() + i);
1122       return;
1123     }
1124   }
1125 }
1126
1127 void RenderWidgetHostImpl::GetWebScreenInfo(blink::WebScreenInfo* result) {
1128   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::GetWebScreenInfo");
1129   if (view_)
1130     view_->GetScreenInfo(result);
1131   else
1132     RenderWidgetHostViewBase::GetDefaultScreenInfo(result);
1133   latency_tracker_.set_device_scale_factor(result->deviceScaleFactor);
1134   screen_info_out_of_date_ = false;
1135 }
1136
1137 const NativeWebKeyboardEvent*
1138     RenderWidgetHostImpl::GetLastKeyboardEvent() const {
1139   return input_router_->GetLastKeyboardEvent();
1140 }
1141
1142 void RenderWidgetHostImpl::NotifyScreenInfoChanged() {
1143   if (delegate_)
1144     delegate_->ScreenInfoChanged();
1145
1146   // The resize message (which may not happen immediately) will carry with it
1147   // the screen info as well as the new size (if the screen has changed scale
1148   // factor).
1149   InvalidateScreenInfo();
1150   WasResized();
1151 }
1152
1153 void RenderWidgetHostImpl::InvalidateScreenInfo() {
1154   screen_info_out_of_date_ = true;
1155   screen_info_.reset();
1156 }
1157
1158 void RenderWidgetHostImpl::GetSnapshotFromBrowser(
1159     const base::Callback<void(const unsigned char*,size_t)> callback) {
1160   int id = next_browser_snapshot_id_++;
1161   pending_browser_snapshots_.insert(std::make_pair(id, callback));
1162   Send(new ViewMsg_ForceRedraw(GetRoutingID(), id));
1163 }
1164
1165 void RenderWidgetHostImpl::OnSelectionChanged(const base::string16& text,
1166                                               size_t offset,
1167                                               const gfx::Range& range) {
1168   if (view_)
1169     view_->SelectionChanged(text, offset, range);
1170 }
1171
1172 void RenderWidgetHostImpl::OnSelectionBoundsChanged(
1173     const ViewHostMsg_SelectionBounds_Params& params) {
1174   if (view_) {
1175     view_->SelectionBoundsChanged(params);
1176   }
1177 }
1178
1179 void RenderWidgetHostImpl::UpdateVSyncParameters(base::TimeTicks timebase,
1180                                                  base::TimeDelta interval) {
1181   Send(new ViewMsg_UpdateVSyncParameters(GetRoutingID(), timebase, interval));
1182 }
1183
1184 void RenderWidgetHostImpl::RendererExited(base::TerminationStatus status,
1185                                           int exit_code) {
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
1214   if (view_) {
1215     GpuSurfaceTracker::Get()->SetSurfaceHandle(surface_id_,
1216                                                gfx::GLSurfaceHandle());
1217     view_->RenderProcessGone(status, exit_code);
1218     view_ = NULL; // The View should be deleted by RenderProcessGone.
1219     view_weak_.reset();
1220   }
1221
1222   // Reconstruct the input router to ensure that it has fresh state for a new
1223   // renderer. Otherwise it may be stuck waiting for the old renderer to ack an
1224   // event. (In particular, the above call to view_->RenderProcessGone will
1225   // destroy the aura window, which may dispatch a synthetic mouse move.)
1226   input_router_.reset(new InputRouterImpl(
1227       process_, this, this, routing_id_, GetInputRouterConfigForPlatform()));
1228
1229   synthetic_gesture_controller_.reset();
1230 }
1231
1232 void RenderWidgetHostImpl::UpdateTextDirection(WebTextDirection direction) {
1233   text_direction_updated_ = true;
1234   text_direction_ = direction;
1235 }
1236
1237 void RenderWidgetHostImpl::CancelUpdateTextDirection() {
1238   if (text_direction_updated_)
1239     text_direction_canceled_ = true;
1240 }
1241
1242 void RenderWidgetHostImpl::NotifyTextDirection() {
1243   if (text_direction_updated_) {
1244     if (!text_direction_canceled_)
1245       Send(new ViewMsg_SetTextDirection(GetRoutingID(), text_direction_));
1246     text_direction_updated_ = false;
1247     text_direction_canceled_ = false;
1248   }
1249 }
1250
1251 void RenderWidgetHostImpl::SetInputMethodActive(bool activate) {
1252   input_method_active_ = activate;
1253   Send(new ViewMsg_SetInputMethodActive(GetRoutingID(), activate));
1254 }
1255
1256 void RenderWidgetHostImpl::CandidateWindowShown() {
1257   Send(new ViewMsg_CandidateWindowShown(GetRoutingID()));
1258 }
1259
1260 void RenderWidgetHostImpl::CandidateWindowUpdated() {
1261   Send(new ViewMsg_CandidateWindowUpdated(GetRoutingID()));
1262 }
1263
1264 void RenderWidgetHostImpl::CandidateWindowHidden() {
1265   Send(new ViewMsg_CandidateWindowHidden(GetRoutingID()));
1266 }
1267
1268 void RenderWidgetHostImpl::ImeSetComposition(
1269     const base::string16& text,
1270     const std::vector<blink::WebCompositionUnderline>& underlines,
1271     int selection_start,
1272     int selection_end) {
1273   Send(new InputMsg_ImeSetComposition(
1274             GetRoutingID(), text, underlines, selection_start, selection_end));
1275 }
1276
1277 void RenderWidgetHostImpl::ImeConfirmComposition(
1278     const base::string16& text,
1279     const gfx::Range& replacement_range,
1280     bool keep_selection) {
1281   Send(new InputMsg_ImeConfirmComposition(
1282         GetRoutingID(), text, replacement_range, keep_selection));
1283 }
1284
1285 void RenderWidgetHostImpl::ImeCancelComposition() {
1286   Send(new InputMsg_ImeSetComposition(GetRoutingID(), base::string16(),
1287             std::vector<blink::WebCompositionUnderline>(), 0, 0));
1288 }
1289
1290 gfx::Rect RenderWidgetHostImpl::GetRootWindowResizerRect() const {
1291   return gfx::Rect();
1292 }
1293
1294 void RenderWidgetHostImpl::RequestToLockMouse(bool user_gesture,
1295                                               bool last_unlocked_by_target) {
1296   // Directly reject to lock the mouse. Subclass can override this method to
1297   // decide whether to allow mouse lock or not.
1298   GotResponseToLockMouseRequest(false);
1299 }
1300
1301 void RenderWidgetHostImpl::RejectMouseLockOrUnlockIfNecessary() {
1302   DCHECK(!pending_mouse_lock_request_ || !IsMouseLocked());
1303   if (pending_mouse_lock_request_) {
1304     pending_mouse_lock_request_ = false;
1305     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1306   } else if (IsMouseLocked()) {
1307     view_->UnlockMouse();
1308   }
1309 }
1310
1311 bool RenderWidgetHostImpl::IsMouseLocked() const {
1312   return view_ ? view_->IsMouseLocked() : false;
1313 }
1314
1315 bool RenderWidgetHostImpl::IsFullscreen() const {
1316   return false;
1317 }
1318
1319 void RenderWidgetHostImpl::SetAutoResize(bool enable,
1320                                          const gfx::Size& min_size,
1321                                          const gfx::Size& max_size) {
1322   auto_resize_enabled_ = enable;
1323   min_size_for_auto_resize_ = min_size;
1324   max_size_for_auto_resize_ = max_size;
1325 }
1326
1327 void RenderWidgetHostImpl::Cleanup() {
1328   if (view_) {
1329     view_->Destroy();
1330     view_ = nullptr;
1331   }
1332 }
1333
1334 void RenderWidgetHostImpl::Destroy() {
1335   NotificationService::current()->Notify(
1336       NOTIFICATION_RENDER_WIDGET_HOST_DESTROYED,
1337       Source<RenderWidgetHost>(this),
1338       NotificationService::NoDetails());
1339
1340   // Tell the view to die.
1341   // Note that in the process of the view shutting down, it can call a ton
1342   // of other messages on us.  So if you do any other deinitialization here,
1343   // do it after this call to view_->Destroy().
1344   if (view_) {
1345     view_->Destroy();
1346     view_ = nullptr;
1347   }
1348
1349   delete this;
1350 }
1351
1352 void RenderWidgetHostImpl::RendererIsUnresponsive() {
1353   NotificationService::current()->Notify(
1354       NOTIFICATION_RENDER_WIDGET_HOST_HANG,
1355       Source<RenderWidgetHost>(this),
1356       NotificationService::NoDetails());
1357   is_unresponsive_ = true;
1358   NotifyRendererUnresponsive();
1359 }
1360
1361 void RenderWidgetHostImpl::RendererIsResponsive() {
1362   if (is_unresponsive_) {
1363     is_unresponsive_ = false;
1364     NotifyRendererResponsive();
1365   }
1366 }
1367
1368 void RenderWidgetHostImpl::OnRenderViewReady() {
1369   SendScreenRects();
1370   WasResized();
1371 }
1372
1373 void RenderWidgetHostImpl::OnRenderProcessGone(int status, int exit_code) {
1374   // RenderFrameHost owns a RenderWidgetHost when it needs one, in which case
1375   // it handles destruction.
1376   if (!owned_by_render_frame_host_) {
1377     // TODO(evanm): This synchronously ends up calling "delete this".
1378     // Is that really what we want in response to this message?  I'm matching
1379     // previous behavior of the code here.
1380     Destroy();
1381   } else {
1382     RendererExited(static_cast<base::TerminationStatus>(status), exit_code);
1383   }
1384 }
1385
1386 void RenderWidgetHostImpl::OnClose() {
1387   Shutdown();
1388 }
1389
1390 void RenderWidgetHostImpl::OnSetTooltipText(
1391     const base::string16& tooltip_text,
1392     WebTextDirection text_direction_hint) {
1393   // First, add directionality marks around tooltip text if necessary.
1394   // A naive solution would be to simply always wrap the text. However, on
1395   // windows, Unicode directional embedding characters can't be displayed on
1396   // systems that lack RTL fonts and are instead displayed as empty squares.
1397   //
1398   // To get around this we only wrap the string when we deem it necessary i.e.
1399   // when the locale direction is different than the tooltip direction hint.
1400   //
1401   // Currently, we use element's directionality as the tooltip direction hint.
1402   // An alternate solution would be to set the overall directionality based on
1403   // trying to detect the directionality from the tooltip text rather than the
1404   // element direction.  One could argue that would be a preferable solution
1405   // but we use the current approach to match Fx & IE's behavior.
1406   base::string16 wrapped_tooltip_text = tooltip_text;
1407   if (!tooltip_text.empty()) {
1408     if (text_direction_hint == blink::WebTextDirectionLeftToRight) {
1409       // Force the tooltip to have LTR directionality.
1410       wrapped_tooltip_text =
1411           base::i18n::GetDisplayStringInLTRDirectionality(wrapped_tooltip_text);
1412     } else if (text_direction_hint == blink::WebTextDirectionRightToLeft &&
1413                !base::i18n::IsRTL()) {
1414       // Force the tooltip to have RTL directionality.
1415       base::i18n::WrapStringWithRTLFormatting(&wrapped_tooltip_text);
1416     }
1417   }
1418   if (GetView())
1419     view_->SetTooltipText(wrapped_tooltip_text);
1420 }
1421
1422 void RenderWidgetHostImpl::OnUpdateScreenRectsAck() {
1423   waiting_for_screen_rects_ack_ = false;
1424   if (!view_)
1425     return;
1426
1427   if (view_->GetViewBounds() == last_view_screen_rect_ &&
1428       view_->GetBoundsInRootWindow() == last_window_screen_rect_) {
1429     return;
1430   }
1431
1432   SendScreenRects();
1433 }
1434
1435 void RenderWidgetHostImpl::OnRequestMove(const gfx::Rect& pos) {
1436   if (view_) {
1437     view_->SetBounds(pos);
1438     Send(new ViewMsg_Move_ACK(routing_id_));
1439   }
1440 }
1441
1442 bool RenderWidgetHostImpl::OnSwapCompositorFrame(
1443     const IPC::Message& message) {
1444   // This trace event is used in
1445   // chrome/browser/extensions/api/cast_streaming/performance_test.cc
1446   TRACE_EVENT0("test_fps,benchmark", "OnSwapCompositorFrame");
1447   ViewHostMsg_SwapCompositorFrame::Param param;
1448   if (!ViewHostMsg_SwapCompositorFrame::Read(&message, &param))
1449     return false;
1450   scoped_ptr<cc::CompositorFrame> frame(new cc::CompositorFrame);
1451   uint32 output_surface_id = get<0>(param);
1452   get<1>(param).AssignTo(frame.get());
1453   std::vector<IPC::Message> messages_to_deliver_with_frame;
1454   messages_to_deliver_with_frame.swap(get<2>(param));
1455
1456   latency_tracker_.OnSwapCompositorFrame(&frame->metadata.latency_info);
1457
1458   input_router_->OnViewUpdated(
1459       GetInputRouterViewFlagsFromCompositorFrameMetadata(frame->metadata));
1460
1461   if (touch_emulator_) {
1462     touch_emulator_->SetDoubleTapSupportForPageEnabled(
1463         !IsMobileOptimizedFrame(frame->metadata));
1464   }
1465
1466   if (view_) {
1467     view_->OnSwapCompositorFrame(output_surface_id, frame.Pass());
1468     view_->DidReceiveRendererFrame();
1469   } else {
1470     cc::CompositorFrameAck ack;
1471     if (frame->gl_frame_data) {
1472       ack.gl_frame_data = frame->gl_frame_data.Pass();
1473       ack.gl_frame_data->sync_point = 0;
1474     } else if (frame->delegated_frame_data) {
1475       cc::TransferableResource::ReturnResources(
1476           frame->delegated_frame_data->resource_list,
1477           &ack.resources);
1478     } else if (frame->software_frame_data) {
1479       ack.last_software_frame_id = frame->software_frame_data->id;
1480     }
1481     SendSwapCompositorFrameAck(routing_id_, output_surface_id,
1482                                process_->GetID(), ack);
1483   }
1484
1485   RenderProcessHost* rph = GetProcess();
1486   for (std::vector<IPC::Message>::const_iterator i =
1487            messages_to_deliver_with_frame.begin();
1488        i != messages_to_deliver_with_frame.end();
1489        ++i) {
1490     rph->OnMessageReceived(*i);
1491     if (i->dispatch_error())
1492       rph->OnBadMessageReceived(*i);
1493   }
1494   messages_to_deliver_with_frame.clear();
1495
1496   return true;
1497 }
1498
1499 void RenderWidgetHostImpl::OnFlingingStopped() {
1500   if (view_)
1501     view_->DidStopFlinging();
1502 }
1503
1504 void RenderWidgetHostImpl::OnUpdateRect(
1505     const ViewHostMsg_UpdateRect_Params& params) {
1506   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::OnUpdateRect");
1507   TimeTicks paint_start = TimeTicks::Now();
1508
1509   // Update our knowledge of the RenderWidget's size.
1510   current_size_ = params.view_size;
1511
1512   bool is_resize_ack =
1513       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1514
1515   // resize_ack_pending_ needs to be cleared before we call DidPaintRect, since
1516   // that will end up reaching GetBackingStore.
1517   if (is_resize_ack) {
1518     DCHECK(!g_check_for_pending_resize_ack || resize_ack_pending_);
1519     resize_ack_pending_ = false;
1520   }
1521
1522   bool is_repaint_ack =
1523       ViewHostMsg_UpdateRect_Flags::is_repaint_ack(params.flags);
1524   if (is_repaint_ack) {
1525     DCHECK(repaint_ack_pending_);
1526     TRACE_EVENT_ASYNC_END0(
1527         "renderer_host", "RenderWidgetHostImpl::repaint_ack_pending_", this);
1528     repaint_ack_pending_ = false;
1529     TimeDelta delta = TimeTicks::Now() - repaint_start_time_;
1530     UMA_HISTOGRAM_TIMES("MPArch.RWH_RepaintDelta", delta);
1531   }
1532
1533   DCHECK(!params.view_size.IsEmpty());
1534
1535   DidUpdateBackingStore(params, paint_start);
1536
1537   if (auto_resize_enabled_) {
1538     bool post_callback = new_auto_size_.IsEmpty();
1539     new_auto_size_ = params.view_size;
1540     if (post_callback) {
1541       base::MessageLoop::current()->PostTask(
1542           FROM_HERE,
1543           base::Bind(&RenderWidgetHostImpl::DelayedAutoResized,
1544                      weak_factory_.GetWeakPtr()));
1545     }
1546   }
1547
1548   // Log the time delta for processing a paint message. On platforms that don't
1549   // support asynchronous painting, this is equivalent to
1550   // MPArch.RWH_TotalPaintTime.
1551   TimeDelta delta = TimeTicks::Now() - paint_start;
1552   UMA_HISTOGRAM_TIMES("MPArch.RWH_OnMsgUpdateRect", delta);
1553 }
1554
1555 void RenderWidgetHostImpl::DidUpdateBackingStore(
1556     const ViewHostMsg_UpdateRect_Params& params,
1557     const TimeTicks& paint_start) {
1558   TRACE_EVENT0("renderer_host", "RenderWidgetHostImpl::DidUpdateBackingStore");
1559   TimeTicks update_start = TimeTicks::Now();
1560
1561   // Move the plugins if the view hasn't already been destroyed.  Plugin moves
1562   // will not be re-issued, so must move them now, regardless of whether we
1563   // paint or not.  MovePluginWindows attempts to move the plugin windows and
1564   // in the process could dispatch other window messages which could cause the
1565   // view to be destroyed.
1566   if (view_)
1567     view_->MovePluginWindows(params.plugin_window_moves);
1568
1569   NotificationService::current()->Notify(
1570       NOTIFICATION_RENDER_WIDGET_HOST_DID_UPDATE_BACKING_STORE,
1571       Source<RenderWidgetHost>(this),
1572       NotificationService::NoDetails());
1573
1574   // We don't need to update the view if the view is hidden. We must do this
1575   // early return after the ACK is sent, however, or the renderer will not send
1576   // us more data.
1577   if (is_hidden_)
1578     return;
1579
1580   // If we got a resize ack, then perhaps we have another resize to send?
1581   bool is_resize_ack =
1582       ViewHostMsg_UpdateRect_Flags::is_resize_ack(params.flags);
1583   if (is_resize_ack)
1584     WasResized();
1585
1586   // Log the time delta for processing a paint message.
1587   TimeTicks now = TimeTicks::Now();
1588   TimeDelta delta = now - update_start;
1589   UMA_HISTOGRAM_TIMES("MPArch.RWH_DidUpdateBackingStore", delta);
1590 }
1591
1592 void RenderWidgetHostImpl::OnQueueSyntheticGesture(
1593     const SyntheticGesturePacket& gesture_packet) {
1594   // Only allow untrustworthy gestures if explicitly enabled.
1595   if (!base::CommandLine::ForCurrentProcess()->HasSwitch(
1596           cc::switches::kEnableGpuBenchmarking)) {
1597     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH7"));
1598     GetProcess()->ReceivedBadMessage();
1599     return;
1600   }
1601
1602   QueueSyntheticGesture(
1603         SyntheticGesture::Create(*gesture_packet.gesture_params()),
1604         base::Bind(&RenderWidgetHostImpl::OnSyntheticGestureCompleted,
1605                    weak_factory_.GetWeakPtr()));
1606 }
1607
1608 void RenderWidgetHostImpl::OnFocus() {
1609   // Only RenderViewHost can deal with that message.
1610   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH4"));
1611   GetProcess()->ReceivedBadMessage();
1612 }
1613
1614 void RenderWidgetHostImpl::OnBlur() {
1615   // Only RenderViewHost can deal with that message.
1616   RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH5"));
1617   GetProcess()->ReceivedBadMessage();
1618 }
1619
1620 void RenderWidgetHostImpl::OnSetCursor(const WebCursor& cursor) {
1621   SetCursor(cursor);
1622 }
1623
1624 void RenderWidgetHostImpl::SetTouchEventEmulationEnabled(
1625     bool enabled, ui::GestureProviderConfigType config_type) {
1626   if (enabled) {
1627     if (!touch_emulator_)
1628       touch_emulator_.reset(new TouchEmulator(this));
1629     touch_emulator_->Enable(config_type);
1630   } else {
1631     if (touch_emulator_)
1632       touch_emulator_->Disable();
1633   }
1634 }
1635
1636 void RenderWidgetHostImpl::OnTextInputTypeChanged(
1637     ui::TextInputType type,
1638     ui::TextInputMode input_mode,
1639     bool can_compose_inline,
1640     int flags) {
1641   if (view_)
1642     view_->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
1643 }
1644
1645 void RenderWidgetHostImpl::OnImeCompositionRangeChanged(
1646     const gfx::Range& range,
1647     const std::vector<gfx::Rect>& character_bounds) {
1648   if (view_)
1649     view_->ImeCompositionRangeChanged(range, character_bounds);
1650 }
1651
1652 void RenderWidgetHostImpl::OnImeCancelComposition() {
1653   if (view_)
1654     view_->ImeCancelComposition();
1655 }
1656
1657 void RenderWidgetHostImpl::OnLockMouse(bool user_gesture,
1658                                        bool last_unlocked_by_target,
1659                                        bool privileged) {
1660
1661   if (pending_mouse_lock_request_) {
1662     Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1663     return;
1664   } else if (IsMouseLocked()) {
1665     Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1666     return;
1667   }
1668
1669   pending_mouse_lock_request_ = true;
1670   if (privileged && allow_privileged_mouse_lock_) {
1671     // Directly approve to lock the mouse.
1672     GotResponseToLockMouseRequest(true);
1673   } else {
1674     RequestToLockMouse(user_gesture, last_unlocked_by_target);
1675   }
1676 }
1677
1678 void RenderWidgetHostImpl::OnUnlockMouse() {
1679   RejectMouseLockOrUnlockIfNecessary();
1680 }
1681
1682 void RenderWidgetHostImpl::OnShowDisambiguationPopup(
1683     const gfx::Rect& rect_pixels,
1684     const gfx::Size& size,
1685     const cc::SharedBitmapId& id) {
1686   DCHECK(!rect_pixels.IsEmpty());
1687   DCHECK(!size.IsEmpty());
1688
1689   scoped_ptr<cc::SharedBitmap> bitmap =
1690       HostSharedBitmapManager::current()->GetSharedBitmapFromId(size, id);
1691   if (!bitmap) {
1692     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH6"));
1693     GetProcess()->ReceivedBadMessage();
1694     return;
1695   }
1696
1697   DCHECK(bitmap->pixels());
1698
1699   SkImageInfo info = SkImageInfo::MakeN32Premul(size.width(), size.height());
1700   SkBitmap zoomed_bitmap;
1701   zoomed_bitmap.installPixels(info, bitmap->pixels(), info.minRowBytes());
1702
1703   // Note that |rect| is in coordinates of pixels relative to the window origin.
1704   // Aura-based systems will want to convert this to DIPs.
1705   if (view_)
1706     view_->ShowDisambiguationPopup(rect_pixels, zoomed_bitmap);
1707
1708   // It is assumed that the disambiguation popup will make a copy of the
1709   // provided zoomed image, so we delete this one.
1710   zoomed_bitmap.setPixels(0);
1711   Send(new ViewMsg_ReleaseDisambiguationPopupBitmap(GetRoutingID(), id));
1712 }
1713
1714 #if defined(OS_WIN)
1715 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowCreated(
1716     gfx::NativeViewId dummy_activation_window) {
1717   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1718
1719   // This may happen as a result of a race condition when the plugin is going
1720   // away.
1721   wchar_t window_title[MAX_PATH + 1] = {0};
1722   if (!IsWindow(hwnd) ||
1723       !GetWindowText(hwnd, window_title, arraysize(window_title)) ||
1724       lstrcmpiW(window_title, kDummyActivationWindowName) != 0) {
1725     return;
1726   }
1727
1728 #if defined(USE_AURA)
1729   SetParent(hwnd,
1730             reinterpret_cast<HWND>(view_->GetParentForWindowlessPlugin()));
1731 #else
1732   SetParent(hwnd, reinterpret_cast<HWND>(GetNativeViewId()));
1733 #endif
1734   dummy_windows_for_activation_.push_back(hwnd);
1735 }
1736
1737 void RenderWidgetHostImpl::OnWindowlessPluginDummyWindowDestroyed(
1738     gfx::NativeViewId dummy_activation_window) {
1739   HWND hwnd = reinterpret_cast<HWND>(dummy_activation_window);
1740   std::list<HWND>::iterator i = dummy_windows_for_activation_.begin();
1741   for (; i != dummy_windows_for_activation_.end(); ++i) {
1742     if ((*i) == hwnd) {
1743       dummy_windows_for_activation_.erase(i);
1744       return;
1745     }
1746   }
1747   NOTREACHED() << "Unknown dummy window";
1748 }
1749 #endif
1750
1751 void RenderWidgetHostImpl::SetIgnoreInputEvents(bool ignore_input_events) {
1752   ignore_input_events_ = ignore_input_events;
1753 }
1754
1755 bool RenderWidgetHostImpl::KeyPressListenersHandleEvent(
1756     const NativeWebKeyboardEvent& event) {
1757   if (event.skip_in_browser || event.type != WebKeyboardEvent::RawKeyDown)
1758     return false;
1759
1760   for (size_t i = 0; i < key_press_event_callbacks_.size(); i++) {
1761     size_t original_size = key_press_event_callbacks_.size();
1762     if (key_press_event_callbacks_[i].Run(event))
1763       return true;
1764
1765     // Check whether the callback that just ran removed itself, in which case
1766     // the iterator needs to be decremented to properly account for the removal.
1767     size_t current_size = key_press_event_callbacks_.size();
1768     if (current_size != original_size) {
1769       DCHECK_EQ(original_size - 1, current_size);
1770       --i;
1771     }
1772   }
1773
1774   return false;
1775 }
1776
1777 InputEventAckState RenderWidgetHostImpl::FilterInputEvent(
1778     const blink::WebInputEvent& event, const ui::LatencyInfo& latency_info) {
1779   // Don't ignore touch cancel events, since they may be sent while input
1780   // events are being ignored in order to keep the renderer from getting
1781   // confused about how many touches are active.
1782   if (IgnoreInputEvents() && event.type != WebInputEvent::TouchCancel)
1783     return INPUT_EVENT_ACK_STATE_NO_CONSUMER_EXISTS;
1784
1785   if (!process_->HasConnection())
1786     return INPUT_EVENT_ACK_STATE_UNKNOWN;
1787
1788   if (event.type == WebInputEvent::MouseDown)
1789     OnUserGesture();
1790
1791   return view_ ? view_->FilterInputEvent(event)
1792                : INPUT_EVENT_ACK_STATE_NOT_CONSUMED;
1793 }
1794
1795 void RenderWidgetHostImpl::IncrementInFlightEventCount() {
1796   StartHangMonitorTimeout(
1797       TimeDelta::FromMilliseconds(hung_renderer_delay_ms_));
1798   increment_in_flight_event_count();
1799 }
1800
1801 void RenderWidgetHostImpl::DecrementInFlightEventCount() {
1802   if (decrement_in_flight_event_count() <= 0) {
1803     // Cancel pending hung renderer checks since the renderer is responsive.
1804     StopHangMonitorTimeout();
1805   } else {
1806     // The renderer is responsive, but there are in-flight events to wait for.
1807     RestartHangMonitorTimeout();
1808   }
1809 }
1810
1811 void RenderWidgetHostImpl::OnHasTouchEventHandlers(bool has_handlers) {
1812   has_touch_handler_ = has_handlers;
1813 }
1814
1815 void RenderWidgetHostImpl::DidFlush() {
1816   if (synthetic_gesture_controller_)
1817     synthetic_gesture_controller_->OnDidFlushInput();
1818   if (view_)
1819     view_->OnDidFlushInput();
1820 }
1821
1822 void RenderWidgetHostImpl::DidOverscroll(const DidOverscrollParams& params) {
1823   if (view_)
1824     view_->DidOverscroll(params);
1825 }
1826
1827 void RenderWidgetHostImpl::OnKeyboardEventAck(
1828       const NativeWebKeyboardEvent& event,
1829       InputEventAckState ack_result) {
1830 #if defined(OS_MACOSX)
1831   if (!is_hidden() && view_ && view_->PostProcessEventForPluginIme(event))
1832     return;
1833 #endif
1834
1835   // We only send unprocessed key event upwards if we are not hidden,
1836   // because the user has moved away from us and no longer expect any effect
1837   // of this key event.
1838   const bool processed = (INPUT_EVENT_ACK_STATE_CONSUMED == ack_result);
1839   if (delegate_ && !processed && !is_hidden() && !event.skip_in_browser) {
1840     delegate_->HandleKeyboardEvent(event);
1841
1842     // WARNING: This RenderWidgetHostImpl can be deallocated at this point
1843     // (i.e.  in the case of Ctrl+W, where the call to
1844     // HandleKeyboardEvent destroys this RenderWidgetHostImpl).
1845   }
1846 }
1847
1848 void RenderWidgetHostImpl::OnWheelEventAck(
1849     const MouseWheelEventWithLatencyInfo& wheel_event,
1850     InputEventAckState ack_result) {
1851   latency_tracker_.OnInputEventAck(wheel_event.event, &wheel_event.latency);
1852
1853   if (!is_hidden() && view_) {
1854     if (ack_result != INPUT_EVENT_ACK_STATE_CONSUMED &&
1855         delegate_->HandleWheelEvent(wheel_event.event)) {
1856       ack_result = INPUT_EVENT_ACK_STATE_CONSUMED;
1857     }
1858     view_->WheelEventAck(wheel_event.event, ack_result);
1859   }
1860 }
1861
1862 void RenderWidgetHostImpl::OnGestureEventAck(
1863     const GestureEventWithLatencyInfo& event,
1864     InputEventAckState ack_result) {
1865   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1866
1867   if (view_)
1868     view_->GestureEventAck(event.event, ack_result);
1869 }
1870
1871 void RenderWidgetHostImpl::OnTouchEventAck(
1872     const TouchEventWithLatencyInfo& event,
1873     InputEventAckState ack_result) {
1874   latency_tracker_.OnInputEventAck(event.event, &event.latency);
1875
1876   if (touch_emulator_ &&
1877       touch_emulator_->HandleTouchEventAck(event.event, ack_result)) {
1878     return;
1879   }
1880
1881   if (view_)
1882     view_->ProcessAckedTouchEvent(event, ack_result);
1883 }
1884
1885 void RenderWidgetHostImpl::OnUnexpectedEventAck(UnexpectedEventAckType type) {
1886   if (type == BAD_ACK_MESSAGE) {
1887     RecordAction(base::UserMetricsAction("BadMessageTerminate_RWH2"));
1888     process_->ReceivedBadMessage();
1889   } else if (type == UNEXPECTED_EVENT_TYPE) {
1890     suppress_next_char_events_ = false;
1891   }
1892 }
1893
1894 void RenderWidgetHostImpl::OnSyntheticGestureCompleted(
1895     SyntheticGesture::Result result) {
1896   Send(new InputMsg_SyntheticGestureCompleted(GetRoutingID()));
1897 }
1898
1899 bool RenderWidgetHostImpl::IgnoreInputEvents() const {
1900   return ignore_input_events_ || process_->IgnoreInputEvents();
1901 }
1902
1903 void RenderWidgetHostImpl::StartUserGesture() {
1904   OnUserGesture();
1905 }
1906
1907 void RenderWidgetHostImpl::SetBackgroundOpaque(bool opaque) {
1908   Send(new ViewMsg_SetBackgroundOpaque(GetRoutingID(), opaque));
1909 }
1910
1911 void RenderWidgetHostImpl::SetEditCommandsForNextKeyEvent(
1912     const std::vector<EditCommand>& commands) {
1913   Send(new InputMsg_SetEditCommandsForNextKeyEvent(GetRoutingID(), commands));
1914 }
1915
1916 void RenderWidgetHostImpl::ExecuteEditCommand(const std::string& command,
1917                                               const std::string& value) {
1918   Send(new InputMsg_ExecuteEditCommand(GetRoutingID(), command, value));
1919 }
1920
1921 void RenderWidgetHostImpl::ScrollFocusedEditableNodeIntoRect(
1922     const gfx::Rect& rect) {
1923   Send(new InputMsg_ScrollFocusedEditableNodeIntoRect(GetRoutingID(), rect));
1924 }
1925
1926 void RenderWidgetHostImpl::MoveCaret(const gfx::Point& point) {
1927   Send(new InputMsg_MoveCaret(GetRoutingID(), point));
1928 }
1929
1930 bool RenderWidgetHostImpl::GotResponseToLockMouseRequest(bool allowed) {
1931   if (!allowed) {
1932     RejectMouseLockOrUnlockIfNecessary();
1933     return false;
1934   } else {
1935     if (!pending_mouse_lock_request_) {
1936       // This is possible, e.g., the plugin sends us an unlock request before
1937       // the user allows to lock to mouse.
1938       return false;
1939     }
1940
1941     pending_mouse_lock_request_ = false;
1942     if (!view_ || !view_->HasFocus()|| !view_->LockMouse()) {
1943       Send(new ViewMsg_LockMouse_ACK(routing_id_, false));
1944       return false;
1945     } else {
1946       Send(new ViewMsg_LockMouse_ACK(routing_id_, true));
1947       return true;
1948     }
1949   }
1950 }
1951
1952 // static
1953 void RenderWidgetHostImpl::SendSwapCompositorFrameAck(
1954     int32 route_id,
1955     uint32 output_surface_id,
1956     int renderer_host_id,
1957     const cc::CompositorFrameAck& ack) {
1958   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1959   if (!host)
1960     return;
1961   host->Send(new ViewMsg_SwapCompositorFrameAck(
1962       route_id, output_surface_id, ack));
1963 }
1964
1965 // static
1966 void RenderWidgetHostImpl::SendReclaimCompositorResources(
1967     int32 route_id,
1968     uint32 output_surface_id,
1969     int renderer_host_id,
1970     const cc::CompositorFrameAck& ack) {
1971   RenderProcessHost* host = RenderProcessHost::FromID(renderer_host_id);
1972   if (!host)
1973     return;
1974   host->Send(
1975       new ViewMsg_ReclaimCompositorResources(route_id, output_surface_id, ack));
1976 }
1977
1978 void RenderWidgetHostImpl::DelayedAutoResized() {
1979   gfx::Size new_size = new_auto_size_;
1980   // Clear the new_auto_size_ since the empty value is used as a flag to
1981   // indicate that no callback is in progress (i.e. without this line
1982   // DelayedAutoResized will not get called again).
1983   new_auto_size_.SetSize(0, 0);
1984   if (!auto_resize_enabled_)
1985     return;
1986
1987   OnRenderAutoResized(new_size);
1988 }
1989
1990 void RenderWidgetHostImpl::DetachDelegate() {
1991   delegate_ = NULL;
1992 }
1993
1994 void RenderWidgetHostImpl::FrameSwapped(const ui::LatencyInfo& latency_info) {
1995   ui::LatencyInfo::LatencyComponent window_snapshot_component;
1996   if (latency_info.FindLatency(ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT,
1997                                GetLatencyComponentId(),
1998                                &window_snapshot_component)) {
1999     WindowOldSnapshotReachedScreen(
2000         static_cast<int>(window_snapshot_component.sequence_number));
2001   }
2002   if (latency_info.FindLatency(ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT,
2003                                GetLatencyComponentId(),
2004                                &window_snapshot_component)) {
2005     int sequence_number = static_cast<int>(
2006         window_snapshot_component.sequence_number);
2007 #if defined(OS_MACOSX)
2008     // On Mac, when using CoreAnmation, there is a delay between when content
2009     // is drawn to the screen, and when the snapshot will actually pick up
2010     // that content. Insert a manual delay of 1/6th of a second (to simulate
2011     // 10 frames at 60 fps) before actually taking the snapshot.
2012     base::MessageLoop::current()->PostDelayedTask(
2013         FROM_HERE,
2014         base::Bind(&RenderWidgetHostImpl::WindowSnapshotReachedScreen,
2015                    weak_factory_.GetWeakPtr(),
2016                    sequence_number),
2017         base::TimeDelta::FromSecondsD(1. / 6));
2018 #else
2019     WindowSnapshotReachedScreen(sequence_number);
2020 #endif
2021   }
2022
2023   latency_tracker_.OnFrameSwapped(latency_info);
2024 }
2025
2026 void RenderWidgetHostImpl::DidReceiveRendererFrame() {
2027   view_->DidReceiveRendererFrame();
2028 }
2029
2030 void RenderWidgetHostImpl::WindowSnapshotAsyncCallback(
2031     int routing_id,
2032     int snapshot_id,
2033     gfx::Size snapshot_size,
2034     scoped_refptr<base::RefCountedBytes> png_data) {
2035   if (!png_data.get()) {
2036     std::vector<unsigned char> png_vector;
2037     Send(new ViewMsg_WindowSnapshotCompleted(
2038         routing_id, snapshot_id, gfx::Size(), png_vector));
2039     return;
2040   }
2041
2042   Send(new ViewMsg_WindowSnapshotCompleted(
2043       routing_id, snapshot_id, snapshot_size, png_data->data()));
2044 }
2045
2046 void RenderWidgetHostImpl::WindowOldSnapshotReachedScreen(int snapshot_id) {
2047   DCHECK(base::MessageLoopForUI::IsCurrent());
2048
2049   std::vector<unsigned char> png;
2050
2051   // This feature is behind the kEnableGpuBenchmarking command line switch
2052   // because it poses security concerns and should only be used for testing.
2053   const base::CommandLine& command_line =
2054       *base::CommandLine::ForCurrentProcess();
2055   if (!command_line.HasSwitch(cc::switches::kEnableGpuBenchmarking)) {
2056     Send(new ViewMsg_WindowSnapshotCompleted(
2057         GetRoutingID(), snapshot_id, gfx::Size(), png));
2058     return;
2059   }
2060
2061   gfx::Rect view_bounds = GetView()->GetViewBounds();
2062   gfx::Rect snapshot_bounds(view_bounds.size());
2063   gfx::Size snapshot_size = snapshot_bounds.size();
2064
2065   if (ui::GrabViewSnapshot(
2066           GetView()->GetNativeView(), &png, snapshot_bounds)) {
2067     Send(new ViewMsg_WindowSnapshotCompleted(
2068         GetRoutingID(), snapshot_id, snapshot_size, png));
2069     return;
2070   }
2071
2072   ui::GrabViewSnapshotAsync(
2073       GetView()->GetNativeView(),
2074       snapshot_bounds,
2075       base::ThreadTaskRunnerHandle::Get(),
2076       base::Bind(&RenderWidgetHostImpl::WindowSnapshotAsyncCallback,
2077                  weak_factory_.GetWeakPtr(),
2078                  GetRoutingID(),
2079                  snapshot_id,
2080                  snapshot_size));
2081 }
2082
2083 void RenderWidgetHostImpl::WindowSnapshotReachedScreen(int snapshot_id) {
2084   DCHECK(base::MessageLoopForUI::IsCurrent());
2085
2086   gfx::Rect view_bounds = GetView()->GetViewBounds();
2087   gfx::Rect snapshot_bounds(view_bounds.size());
2088
2089   std::vector<unsigned char> png;
2090   if (ui::GrabViewSnapshot(
2091       GetView()->GetNativeView(), &png, snapshot_bounds)) {
2092     OnSnapshotDataReceived(snapshot_id, &png.front(), png.size());
2093     return;
2094   }
2095
2096   ui::GrabViewSnapshotAsync(
2097       GetView()->GetNativeView(),
2098       snapshot_bounds,
2099       base::ThreadTaskRunnerHandle::Get(),
2100       base::Bind(&RenderWidgetHostImpl::OnSnapshotDataReceivedAsync,
2101                  weak_factory_.GetWeakPtr(),
2102                  snapshot_id));
2103 }
2104
2105 void RenderWidgetHostImpl::OnSnapshotDataReceived(int snapshot_id,
2106                                                   const unsigned char* data,
2107                                                   size_t size) {
2108   // Any pending snapshots with a lower ID than the one received are considered
2109   // to be implicitly complete, and returned the same snapshot data.
2110   PendingSnapshotMap::iterator it = pending_browser_snapshots_.begin();
2111   while(it != pending_browser_snapshots_.end()) {
2112       if (it->first <= snapshot_id) {
2113         it->second.Run(data, size);
2114         pending_browser_snapshots_.erase(it++);
2115       } else {
2116         ++it;
2117       }
2118   }
2119 }
2120
2121 void RenderWidgetHostImpl::OnSnapshotDataReceivedAsync(
2122     int snapshot_id,
2123     scoped_refptr<base::RefCountedBytes> png_data) {
2124   if (png_data.get())
2125     OnSnapshotDataReceived(snapshot_id, png_data->front(), png_data->size());
2126   else
2127     OnSnapshotDataReceived(snapshot_id, NULL, 0);
2128 }
2129
2130 // static
2131 void RenderWidgetHostImpl::CompositorFrameDrawn(
2132     const std::vector<ui::LatencyInfo>& latency_info) {
2133   for (size_t i = 0; i < latency_info.size(); i++) {
2134     std::set<RenderWidgetHostImpl*> rwhi_set;
2135     for (ui::LatencyInfo::LatencyMap::const_iterator b =
2136              latency_info[i].latency_components.begin();
2137          b != latency_info[i].latency_components.end();
2138          ++b) {
2139       if (b->first.first == ui::INPUT_EVENT_LATENCY_BEGIN_RWH_COMPONENT ||
2140           b->first.first == ui::WINDOW_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2141           b->first.first == ui::WINDOW_OLD_SNAPSHOT_FRAME_NUMBER_COMPONENT ||
2142           b->first.first == ui::TAB_SHOW_COMPONENT) {
2143         // Matches with GetLatencyComponentId
2144         int routing_id = b->first.second & 0xffffffff;
2145         int process_id = (b->first.second >> 32) & 0xffffffff;
2146         RenderWidgetHost* rwh =
2147             RenderWidgetHost::FromID(process_id, routing_id);
2148         if (!rwh) {
2149           continue;
2150         }
2151         RenderWidgetHostImpl* rwhi = RenderWidgetHostImpl::From(rwh);
2152         if (rwhi_set.insert(rwhi).second)
2153           rwhi->FrameSwapped(latency_info[i]);
2154       }
2155     }
2156   }
2157 }
2158
2159 BrowserAccessibilityManager*
2160     RenderWidgetHostImpl::GetRootBrowserAccessibilityManager() {
2161   return delegate_ ? delegate_->GetRootBrowserAccessibilityManager() : NULL;
2162 }
2163
2164 BrowserAccessibilityManager*
2165     RenderWidgetHostImpl::GetOrCreateRootBrowserAccessibilityManager() {
2166   return delegate_ ?
2167       delegate_->GetOrCreateRootBrowserAccessibilityManager() : NULL;
2168 }
2169
2170 base::TimeDelta RenderWidgetHostImpl::GetEstimatedBrowserCompositeTime() const {
2171   return latency_tracker_.GetEstimatedBrowserCompositeTime();
2172 }
2173
2174 #if defined(OS_WIN)
2175 gfx::NativeViewAccessible
2176     RenderWidgetHostImpl::GetParentNativeViewAccessible() {
2177   return delegate_ ? delegate_->GetParentNativeViewAccessible() : NULL;
2178 }
2179 #endif
2180
2181 SkColorType RenderWidgetHostImpl::PreferredReadbackFormat() {
2182   if (view_)
2183     return view_->PreferredReadbackFormat();
2184   return kN32_SkColorType;
2185 }
2186
2187 }  // namespace content