src/content/browser/frame_host/render_widget_host_view_guest.cc

   1 // Copyright 2014 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 "base/bind_helpers.h"
   6 #include "base/command_line.h"
   7 #include "base/logging.h"
   8 #include "base/message_loop/message_loop.h"
   9 #include "content/browser/browser_plugin/browser_plugin_guest.h"
  10 #include "content/browser/frame_host/render_widget_host_view_guest.h"
  11 #include "content/browser/renderer_host/render_view_host_impl.h"
  12 #include "content/common/browser_plugin/browser_plugin_messages.h"
  13 #include "content/common/frame_messages.h"
  14 #include "content/common/gpu/gpu_messages.h"
  15 #include "content/common/input/web_touch_event_traits.h"
  16 #include "content/common/view_messages.h"
  17 #include "content/common/webplugin_geometry.h"
  18 #include "content/public/common/content_switches.h"
  19 #include "skia/ext/platform_canvas.h"
  20 #include "third_party/WebKit/public/platform/WebScreenInfo.h"
  21
  22 #if defined(OS_MACOSX)
  23 #import "content/browser/renderer_host/render_widget_host_view_mac_dictionary_helper.h"
  24 #endif
  25
  26 #if defined(USE_AURA)
  27 #include "content/browser/renderer_host/ui_events_helper.h"
  28 #endif
  29
  30 namespace content {
  31
  32 namespace {
  33
  34 #if defined(USE_AURA)
  35 blink::WebGestureEvent CreateFlingCancelEvent(double time_stamp) {
  36   blink::WebGestureEvent gesture_event;
  37   gesture_event.timeStampSeconds = time_stamp;
  38   gesture_event.type = blink::WebGestureEvent::GestureFlingCancel;
  39   gesture_event.sourceDevice = blink::WebGestureDeviceTouchscreen;
  40   return gesture_event;
  41 }
  42 #endif  // defined(USE_AURA)
  43
  44 }  // namespace
  45
  46 RenderWidgetHostViewGuest::RenderWidgetHostViewGuest(
  47     RenderWidgetHost* widget_host,
  48     BrowserPluginGuest* guest,
  49     base::WeakPtr<RenderWidgetHostViewBase> platform_view)
  50     : RenderWidgetHostViewChildFrame(widget_host),
  51       // |guest| is NULL during test.
  52       guest_(guest ? guest->AsWeakPtr() : base::WeakPtr<BrowserPluginGuest>()),
  53       platform_view_(platform_view) {
  54 #if defined(USE_AURA)
  55   gesture_recognizer_.reset(ui::GestureRecognizer::Create());
  56   gesture_recognizer_->AddGestureEventHelper(this);
  57 #endif  // defined(USE_AURA)
  58 }
  59
  60 RenderWidgetHostViewGuest::~RenderWidgetHostViewGuest() {
  61 #if defined(USE_AURA)
  62   gesture_recognizer_->RemoveGestureEventHelper(this);
  63 #endif  // defined(USE_AURA)
  64 }
  65
  66 bool RenderWidgetHostViewGuest::OnMessageReceivedFromEmbedder(
  67     const IPC::Message& message,
  68     RenderWidgetHostImpl* embedder) {
  69   bool handled = true;
  70   IPC_BEGIN_MESSAGE_MAP_WITH_PARAM(RenderWidgetHostViewGuest, message,
  71                                    embedder)
  72     IPC_MESSAGE_HANDLER(BrowserPluginHostMsg_HandleInputEvent,
  73                         OnHandleInputEvent)
  74     IPC_MESSAGE_UNHANDLED(handled = false)
  75   IPC_END_MESSAGE_MAP()
  76   return handled;
  77 }
  78
  79 void RenderWidgetHostViewGuest::WasShown() {
  80   // If the WebContents associated with us showed an interstitial page in the
  81   // beginning, the teardown path might call WasShown() while |host_| is in
  82   // the process of destruction. Avoid calling WasShown below in this case.
  83   // TODO(lazyboy): We shouldn't be showing interstitial pages in guests in the
  84   // first place: http://crbug.com/273089.
  85   //
  86   // |guest_| is NULL during test.
  87   if ((guest_ && guest_->is_in_destruction()) || !host_->is_hidden())
  88     return;
  89   // Make sure the size of this view matches the size of the WebContentsView.
  90   // The two sizes may fall out of sync if we switch RenderWidgetHostViews,
  91   // resize, and then switch page, as is the case with interstitial pages.
  92   // NOTE: |guest_| is NULL in unit tests.
  93   if (guest_)
  94     SetSize(guest_->web_contents()->GetViewBounds().size());
  95   host_->WasShown(ui::LatencyInfo());
  96 }
  97
  98 void RenderWidgetHostViewGuest::WasHidden() {
  99   // |guest_| is NULL during test.
 100   if ((guest_ && guest_->is_in_destruction()) || host_->is_hidden())
 101     return;
 102   host_->WasHidden();
 103 }
 104
 105 void RenderWidgetHostViewGuest::SetSize(const gfx::Size& size) {
 106   size_ = size;
 107   host_->WasResized();
 108 }
 109
 110 void RenderWidgetHostViewGuest::SetBounds(const gfx::Rect& rect) {
 111   SetSize(rect.size());
 112 }
 113
 114 void RenderWidgetHostViewGuest::Focus() {
 115   // InterstitialPageImpl focuses views directly, so we place focus logic here.
 116   // InterstitialPages are not WebContents, and so BrowserPluginGuest does not
 117   // have direct access to the interstitial page's RenderWidgetHost.
 118   if (guest_)
 119     guest_->SetFocus(host_, true);
 120 }
 121
 122 bool RenderWidgetHostViewGuest::HasFocus() const {
 123   if (!guest_)
 124     return false;
 125   return guest_->focused();
 126 }
 127
 128 #if defined(USE_AURA)
 129 void RenderWidgetHostViewGuest::ProcessAckedTouchEvent(
 130     const TouchEventWithLatencyInfo& touch, InputEventAckState ack_result) {
 131   // TODO(fsamuel): Currently we will only take this codepath if the guest has
 132   // requested touch events. A better solution is to always forward touchpresses
 133   // to the embedder process to target a BrowserPlugin, and then route all
 134   // subsequent touch points of that touchdown to the appropriate guest until
 135   // that touch point is released.
 136   ScopedVector<ui::TouchEvent> events;
 137   if (!MakeUITouchEventsFromWebTouchEvents(touch, &events, LOCAL_COORDINATES))
 138     return;
 139
 140   ui::EventResult result = (ack_result ==
 141       INPUT_EVENT_ACK_STATE_CONSUMED) ? ui::ER_HANDLED : ui::ER_UNHANDLED;
 142   for (ScopedVector<ui::TouchEvent>::iterator iter = events.begin(),
 143       end = events.end(); iter != end; ++iter)  {
 144     if (!gesture_recognizer_->ProcessTouchEventPreDispatch(*(*iter), this))
 145       continue;
 146
 147     scoped_ptr<ui::GestureRecognizer::Gestures> gestures;
 148     gestures.reset(gesture_recognizer_->ProcessTouchEventPostDispatch(
 149         *(*iter), result, this));
 150     ProcessGestures(gestures.get());
 151   }
 152 }
 153 #endif
 154
 155 gfx::Rect RenderWidgetHostViewGuest::GetViewBounds() const {
 156   if (!guest_)
 157     return gfx::Rect();
 158
 159   RenderWidgetHostViewBase* rwhv = GetGuestRenderWidgetHostView();
 160   gfx::Rect embedder_bounds;
 161   if (rwhv)
 162     embedder_bounds = rwhv->GetViewBounds();
 163   return gfx::Rect(
 164       guest_->GetScreenCoordinates(embedder_bounds.origin()), size_);
 165 }
 166
 167 void RenderWidgetHostViewGuest::RenderProcessGone(
 168     base::TerminationStatus status,
 169     int error_code) {
 170   platform_view_->RenderProcessGone(status, error_code);
 171   // Destroy the guest view instance only, so we don't end up calling
 172   // platform_view_->Destroy().
 173   DestroyGuestView();
 174 }
 175
 176 void RenderWidgetHostViewGuest::Destroy() {
 177   // The RenderWidgetHost's destruction led here, so don't call it.
 178   DestroyGuestView();
 179
 180   if (platform_view_)  // The platform view might have been destroyed already.
 181     platform_view_->Destroy();
 182 }
 183
 184 gfx::Size RenderWidgetHostViewGuest::GetPhysicalBackingSize() const {
 185   return RenderWidgetHostViewBase::GetPhysicalBackingSize();
 186 }
 187
 188 base::string16 RenderWidgetHostViewGuest::GetSelectedText() const {
 189   return platform_view_->GetSelectedText();
 190 }
 191
 192 void RenderWidgetHostViewGuest::SetTooltipText(
 193     const base::string16& tooltip_text) {
 194   if (guest_)
 195     guest_->SetTooltipText(tooltip_text);
 196 }
 197
 198 void RenderWidgetHostViewGuest::OnSwapCompositorFrame(
 199     uint32 output_surface_id,
 200     scoped_ptr<cc::CompositorFrame> frame) {
 201   if (!guest_)
 202     return;
 203
 204   last_scroll_offset_ = frame->metadata.root_scroll_offset;
 205   guest_->SwapCompositorFrame(output_surface_id,
 206                               host_->GetProcess()->GetID(),
 207                               host_->GetRoutingID(),
 208                               frame.Pass());
 209 }
 210
 211 bool RenderWidgetHostViewGuest::OnMessageReceived(const IPC::Message& msg) {
 212   return platform_view_->OnMessageReceived(msg);
 213 }
 214
 215 void RenderWidgetHostViewGuest::InitAsChild(
 216     gfx::NativeView parent_view) {
 217   platform_view_->InitAsChild(parent_view);
 218 }
 219
 220 void RenderWidgetHostViewGuest::InitAsPopup(
 221     RenderWidgetHostView* parent_host_view, const gfx::Rect& pos) {
 222   // This should never get called.
 223   NOTREACHED();
 224 }
 225
 226 void RenderWidgetHostViewGuest::InitAsFullscreen(
 227     RenderWidgetHostView* reference_host_view) {
 228   // This should never get called.
 229   NOTREACHED();
 230 }
 231
 232 gfx::NativeView RenderWidgetHostViewGuest::GetNativeView() const {
 233   if (!guest_)
 234     return gfx::NativeView();
 235
 236   RenderWidgetHostView* rwhv = guest_->GetEmbedderRenderWidgetHostView();
 237   if (!rwhv)
 238     return gfx::NativeView();
 239   return rwhv->GetNativeView();
 240 }
 241
 242 gfx::NativeViewId RenderWidgetHostViewGuest::GetNativeViewId() const {
 243   if (!guest_)
 244     return static_cast<gfx::NativeViewId>(NULL);
 245
 246   RenderWidgetHostView* rwhv = guest_->GetEmbedderRenderWidgetHostView();
 247   if (!rwhv)
 248     return static_cast<gfx::NativeViewId>(NULL);
 249   return rwhv->GetNativeViewId();
 250 }
 251
 252 gfx::NativeViewAccessible RenderWidgetHostViewGuest::GetNativeViewAccessible() {
 253   if (!guest_)
 254     return gfx::NativeViewAccessible();
 255
 256   RenderWidgetHostView* rwhv = guest_->GetEmbedderRenderWidgetHostView();
 257   if (!rwhv)
 258     return gfx::NativeViewAccessible();
 259   return rwhv->GetNativeViewAccessible();
 260 }
 261
 262 void RenderWidgetHostViewGuest::MovePluginWindows(
 263     const std::vector<WebPluginGeometry>& moves) {
 264   platform_view_->MovePluginWindows(moves);
 265 }
 266
 267 void RenderWidgetHostViewGuest::UpdateCursor(const WebCursor& cursor) {
 268   // InterstitialPages are not WebContents so we cannot intercept
 269   // ViewHostMsg_SetCursor for interstitial pages in BrowserPluginGuest.
 270   // All guest RenderViewHosts have RenderWidgetHostViewGuests however,
 271   // and so we will always hit this code path.
 272   if (!guest_)
 273     return;
 274   guest_->SendMessageToEmbedder(
 275       new BrowserPluginMsg_SetCursor(guest_->browser_plugin_instance_id(),
 276                                      cursor));
 277
 278 }
 279
 280 void RenderWidgetHostViewGuest::SetIsLoading(bool is_loading) {
 281   platform_view_->SetIsLoading(is_loading);
 282 }
 283
 284 void RenderWidgetHostViewGuest::TextInputTypeChanged(
 285     ui::TextInputType type,
 286     ui::TextInputMode input_mode,
 287     bool can_compose_inline,
 288     int flags) {
 289   if (!guest_)
 290     return;
 291
 292   RenderWidgetHostViewBase* rwhv = GetGuestRenderWidgetHostView();
 293   if (!rwhv)
 294     return;
 295   // Forward the information to embedding RWHV.
 296   rwhv->TextInputTypeChanged(type, input_mode, can_compose_inline, flags);
 297 }
 298
 299 void RenderWidgetHostViewGuest::ImeCancelComposition() {
 300   if (!guest_)
 301     return;
 302
 303   RenderWidgetHostViewBase* rwhv = GetGuestRenderWidgetHostView();
 304   if (!rwhv)
 305     return;
 306   // Forward the information to embedding RWHV.
 307   rwhv->ImeCancelComposition();
 308 }
 309
 310 #if defined(OS_MACOSX) || defined(USE_AURA)
 311 void RenderWidgetHostViewGuest::ImeCompositionRangeChanged(
 312     const gfx::Range& range,
 313     const std::vector<gfx::Rect>& character_bounds) {
 314   if (!guest_)
 315     return;
 316
 317   RenderWidgetHostViewBase* rwhv = GetGuestRenderWidgetHostView();
 318   if (!rwhv)
 319     return;
 320   std::vector<gfx::Rect> guest_character_bounds;
 321   for (size_t i = 0; i < character_bounds.size(); ++i) {
 322     guest_character_bounds.push_back(gfx::Rect(
 323         guest_->GetScreenCoordinates(character_bounds[i].origin()),
 324         character_bounds[i].size()));
 325   }
 326   // Forward the information to embedding RWHV.
 327   rwhv->ImeCompositionRangeChanged(range, guest_character_bounds);
 328 }
 329 #endif
 330
 331 void RenderWidgetHostViewGuest::SelectionChanged(const base::string16& text,
 332                                                  size_t offset,
 333                                                  const gfx::Range& range) {
 334   platform_view_->SelectionChanged(text, offset, range);
 335 }
 336
 337 void RenderWidgetHostViewGuest::SelectionBoundsChanged(
 338     const ViewHostMsg_SelectionBounds_Params& params) {
 339   if (!guest_)
 340     return;
 341
 342   RenderWidgetHostViewBase* rwhv = GetGuestRenderWidgetHostView();
 343   if (!rwhv)
 344     return;
 345   ViewHostMsg_SelectionBounds_Params guest_params(params);
 346   guest_params.anchor_rect.set_origin(
 347       guest_->GetScreenCoordinates(params.anchor_rect.origin()));
 348   guest_params.focus_rect.set_origin(
 349       guest_->GetScreenCoordinates(params.focus_rect.origin()));
 350   rwhv->SelectionBoundsChanged(guest_params);
 351 }
 352
 353 void RenderWidgetHostViewGuest::SetBackgroundColor(SkColor color) {
 354   // Content embedders can toggle opaque backgrounds through this API.
 355   // We plumb the value here so that BrowserPlugin updates its compositing
 356   // state in response to this change. We also want to preserve this flag
 357   // after recovering from a crash so we let BrowserPluginGuest store it.
 358   if (!guest_)
 359     return;
 360   RenderWidgetHostViewBase::SetBackgroundColor(color);
 361   bool opaque = GetBackgroundOpaque();
 362   host_->SetBackgroundOpaque(opaque);
 363   guest_->SetContentsOpaque(opaque);
 364 }
 365
 366 bool RenderWidgetHostViewGuest::LockMouse() {
 367   return platform_view_->LockMouse();
 368 }
 369
 370 void RenderWidgetHostViewGuest::UnlockMouse() {
 371   return platform_view_->UnlockMouse();
 372 }
 373
 374 void RenderWidgetHostViewGuest::GetScreenInfo(blink::WebScreenInfo* results) {
 375   if (!guest_)
 376     return;
 377   RenderWidgetHostViewBase* embedder_view = GetGuestRenderWidgetHostView();
 378   if (embedder_view)
 379     embedder_view->GetScreenInfo(results);
 380 }
 381
 382 #if defined(OS_MACOSX)
 383 void RenderWidgetHostViewGuest::SetActive(bool active) {
 384   platform_view_->SetActive(active);
 385 }
 386
 387 void RenderWidgetHostViewGuest::SetWindowVisibility(bool visible) {
 388   platform_view_->SetWindowVisibility(visible);
 389 }
 390
 391 void RenderWidgetHostViewGuest::WindowFrameChanged() {
 392   platform_view_->WindowFrameChanged();
 393 }
 394
 395 void RenderWidgetHostViewGuest::ShowDefinitionForSelection() {
 396   if (!guest_)
 397     return;
 398
 399   gfx::Point origin;
 400   gfx::Rect guest_bounds = GetViewBounds();
 401   RenderWidgetHostView* rwhv = guest_->GetEmbedderRenderWidgetHostView();
 402   gfx::Rect embedder_bounds;
 403   if (rwhv)
 404     embedder_bounds = rwhv->GetViewBounds();
 405
 406   gfx::Vector2d guest_offset = gfx::Vector2d(
 407       // Horizontal offset of guest from embedder.
 408       guest_bounds.x() - embedder_bounds.x(),
 409       // Vertical offset from guest's top to embedder's bottom edge.
 410       embedder_bounds.bottom() - guest_bounds.y());
 411
 412   RenderWidgetHostViewMacDictionaryHelper helper(platform_view_.get());
 413   helper.SetTargetView(rwhv);
 414   helper.set_offset(guest_offset);
 415   helper.ShowDefinitionForSelection();
 416 }
 417
 418 bool RenderWidgetHostViewGuest::SupportsSpeech() const {
 419   return platform_view_->SupportsSpeech();
 420 }
 421
 422 void RenderWidgetHostViewGuest::SpeakSelection() {
 423   platform_view_->SpeakSelection();
 424 }
 425
 426 bool RenderWidgetHostViewGuest::IsSpeaking() const {
 427   return platform_view_->IsSpeaking();
 428 }
 429
 430 void RenderWidgetHostViewGuest::StopSpeaking() {
 431   platform_view_->StopSpeaking();
 432 }
 433
 434 bool RenderWidgetHostViewGuest::PostProcessEventForPluginIme(
 435     const NativeWebKeyboardEvent& event) {
 436   return false;
 437 }
 438
 439 #endif  // defined(OS_MACOSX)
 440
 441 #if defined(OS_ANDROID) || defined(TOOLKIT_VIEWS)
 442 void RenderWidgetHostViewGuest::ShowDisambiguationPopup(
 443     const gfx::Rect& rect_pixels,
 444     const SkBitmap& zoomed_bitmap) {
 445 }
 446 #endif  // defined(OS_ANDROID) || defined(TOOLKIT_VIEWS)
 447
 448 #if defined(OS_ANDROID)
 449 void RenderWidgetHostViewGuest::LockCompositingSurface() {
 450 }
 451
 452 void RenderWidgetHostViewGuest::UnlockCompositingSurface() {
 453 }
 454 #endif  // defined(OS_ANDROID)
 455
 456 #if defined(OS_WIN)
 457 void RenderWidgetHostViewGuest::SetParentNativeViewAccessible(
 458     gfx::NativeViewAccessible accessible_parent) {
 459 }
 460
 461 gfx::NativeViewId RenderWidgetHostViewGuest::GetParentForWindowlessPlugin()
 462     const {
 463   return NULL;
 464 }
 465 #endif
 466
 467 void RenderWidgetHostViewGuest::DestroyGuestView() {
 468   host_->SetView(NULL);
 469   host_ = NULL;
 470   base::MessageLoop::current()->DeleteSoon(FROM_HERE, this);
 471 }
 472
 473 bool RenderWidgetHostViewGuest::CanDispatchToConsumer(
 474     ui::GestureConsumer* consumer) {
 475   CHECK_EQ(static_cast<RenderWidgetHostViewGuest*>(consumer), this);
 476   return true;
 477 }
 478
 479 void RenderWidgetHostViewGuest::DispatchGestureEvent(
 480     ui::GestureEvent* event) {
 481   ForwardGestureEventToRenderer(event);
 482 }
 483
 484 void RenderWidgetHostViewGuest::DispatchCancelTouchEvent(
 485     ui::TouchEvent* event) {
 486   if (!host_)
 487     return;
 488
 489   blink::WebTouchEvent cancel_event;
 490   // TODO(rbyers): This event has no touches in it.  Don't we need to know what
 491   // touches are currently active in order to cancel them all properly?
 492   WebTouchEventTraits::ResetType(blink::WebInputEvent::TouchCancel,
 493                                  event->time_stamp().InSecondsF(),
 494                                  &cancel_event);
 495
 496   host_->ForwardTouchEventWithLatencyInfo(cancel_event, *event->latency());
 497 }
 498
 499 bool RenderWidgetHostViewGuest::ForwardGestureEventToRenderer(
 500     ui::GestureEvent* gesture) {
 501 #if defined(USE_AURA)
 502   if (!host_)
 503     return false;
 504
 505   if ((gesture->type() == ui::ET_GESTURE_PINCH_BEGIN ||
 506       gesture->type() == ui::ET_GESTURE_PINCH_UPDATE ||
 507       gesture->type() == ui::ET_GESTURE_PINCH_END) && !pinch_zoom_enabled_) {
 508     return true;
 509   }
 510
 511   blink::WebGestureEvent web_gesture =
 512       MakeWebGestureEventFromUIEvent(*gesture);
 513   const gfx::Point& client_point = gesture->location();
 514   const gfx::Point& screen_point = gesture->location();
 515
 516   web_gesture.x = client_point.x();
 517   web_gesture.y = client_point.y();
 518   web_gesture.globalX = screen_point.x();
 519   web_gesture.globalY = screen_point.y();
 520
 521   if (web_gesture.type == blink::WebGestureEvent::Undefined)
 522     return false;
 523   if (web_gesture.type == blink::WebGestureEvent::GestureTapDown) {
 524     host_->ForwardGestureEvent(
 525         CreateFlingCancelEvent(gesture->time_stamp().InSecondsF()));
 526   }
 527   host_->ForwardGestureEvent(web_gesture);
 528   return true;
 529 #else
 530   return false;
 531 #endif
 532 }
 533
 534 void RenderWidgetHostViewGuest::ProcessGestures(
 535     ui::GestureRecognizer::Gestures* gestures) {
 536   if ((gestures == NULL) || gestures->empty())
 537     return;
 538   for (ui::GestureRecognizer::Gestures::iterator g_it = gestures->begin();
 539       g_it != gestures->end();
 540       ++g_it) {
 541     ForwardGestureEventToRenderer(*g_it);
 542   }
 543 }
 544
 545 SkColorType RenderWidgetHostViewGuest::PreferredReadbackFormat() {
 546   return kN32_SkColorType;
 547 }
 548
 549 RenderWidgetHostViewBase*
 550 RenderWidgetHostViewGuest::GetGuestRenderWidgetHostView() const {
 551   return static_cast<RenderWidgetHostViewBase*>(
 552       guest_->GetEmbedderRenderWidgetHostView());
 553 }
 554
 555 void RenderWidgetHostViewGuest::OnHandleInputEvent(
 556     RenderWidgetHostImpl* embedder,
 557     int browser_plugin_instance_id,
 558     const gfx::Rect& guest_window_rect,
 559     const blink::WebInputEvent* event) {
 560   if (blink::WebInputEvent::isMouseEventType(event->type)) {
 561     host_->ForwardMouseEvent(
 562         *static_cast<const blink::WebMouseEvent*>(event));
 563     return;
 564   }
 565
 566   if (event->type == blink::WebInputEvent::MouseWheel) {
 567     host_->ForwardWheelEvent(
 568         *static_cast<const blink::WebMouseWheelEvent*>(event));
 569     return;
 570   }
 571
 572   if (blink::WebInputEvent::isKeyboardEventType(event->type)) {
 573     if (!embedder->GetLastKeyboardEvent())
 574       return;
 575     NativeWebKeyboardEvent keyboard_event(*embedder->GetLastKeyboardEvent());
 576     host_->ForwardKeyboardEvent(keyboard_event);
 577     return;
 578   }
 579
 580   if (blink::WebInputEvent::isTouchEventType(event->type)) {
 581     host_->ForwardTouchEventWithLatencyInfo(
 582         *static_cast<const blink::WebTouchEvent*>(event),
 583         ui::LatencyInfo());
 584     return;
 585   }
 586
 587   if (blink::WebInputEvent::isGestureEventType(event->type)) {
 588     host_->ForwardGestureEvent(
 589         *static_cast<const blink::WebGestureEvent*>(event));
 590     return;
 591   }
 592 }
 593
 594 }  // namespace content