Insert pinch zoom virtual viewport layers to graphics layer tree.

Source/WebKit/chromium/src/WebViewImpl.h

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 63 matching lines @@
 class HitTestResult;
 class KeyboardEvent;
 class Page;
 class PageGroup;
 class PagePopup;
 class PagePopupClient;
 class PlatformKeyboardEvent;
 class PopupContainer;
 class PopupMenuClient;
 class Range;
+class RenderLayerCompositor;
 class RenderTheme;
 class TextFieldDecorator;
 class Widget;
 }
 
 namespace WebKit {
 class AutocompletePopupMenuClient;
 class AutofillPopupMenuClient;
 class ContextFeaturesClientImpl;
 class ContextMenuClientImpl;
 class DeviceOrientationClientProxy;
 class GeolocationClientProxy;
 class LinkHighlight;
+class PinchViewports;
 class PrerendererClientImpl;
 class SpeechInputClientImpl;
 class SpeechRecognitionClientProxy;
 class UserMediaClientImpl;
 class ValidationMessageClientImpl;
 class WebAccessibilityObject;
 class WebActiveGestureAnimation;
 class WebCompositorImpl;
 class WebDevToolsAgentClient;
 class WebDevToolsAgentPrivate;
@@ skipping 402 matching lines @@
     {
         return m_currentInputEvent;
     }
 
     WebCore::GraphicsLayer* rootGraphicsLayer();
     bool allowsAcceleratedCompositing();
     void setRootGraphicsLayer(WebCore::GraphicsLayer*);
     void scheduleCompositingLayerSync();
     void scrollRootLayerRect(const WebCore::IntSize& scrollDelta, const WebCore::IntRect& clipRect);
     WebCore::GraphicsLayerFactory* graphicsLayerFactory() const;
+    WebCore::RenderLayerCompositor* compositor() const;
     void registerForAnimations(WebLayer*);
     void scheduleAnimation();
 
     void didProgrammaticallyScroll(const WebCore::IntPoint& scrollPoint);
 
     virtual void setVisibilityState(WebPageVisibilityState, bool);
 
     WebCore::PopupContainer* selectPopup() const { return m_selectPopup.get(); }
     bool hasOpenedPopup() const { return m_selectPopup || m_pagePopup; }
 
@@ skipping 303 matching lines @@
     WebPoint m_globalPositionOnFlingStart;
     int m_flingModifier;
     bool m_flingSourceDevice;
     OwnPtr<LinkHighlight> m_linkHighlight;
     OwnPtr<ValidationMessageClientImpl> m_validationMessage;
 
     bool m_showFPSCounter;
     bool m_showPaintRects;
     bool m_showDebugBorders;
     bool m_continuousPaintingEnabled;
+
+    OwnPtr<PinchViewports> m_pinchViewports;
 };
 
 } // namespace WebKit
 
 #endif