Make DrawingBuffer and Canvas2DLayerBridge be cc::TextureLayerClients.

third_party/WebKit/public/platform/WebCompositorSupport.h

 /*
  * Copyright (C) 2012 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:
  *
  * 1.  Redistributions of source code must retain the above copyright
  *     notice, this list of conditions and the following disclaimer.
  * 2.  Redistributions in binary form must reproduce the above copyright
@@ skipping 16 matching lines @@
 #define WebCompositorSupport_h
 
 #include "WebCommon.h"
 #include "WebFloatPoint.h"
 #include "WebLayerTreeView.h"
 #include "WebScrollbar.h"
 #include "WebScrollbarThemePainter.h"
 
 namespace cc {
 class Layer;
+class TextureLayerClient;
 }
 
 namespace blink {
 
 class WebContentLayer;
 class WebContentLayerClient;
 class WebExternalTextureLayer;
-class WebExternalTextureLayerClient;
 class WebImageLayer;
 class WebLayer;
 class WebScrollbarLayer;
 class WebScrollbarThemeGeometry;
 
 class WebCompositorSupport {
 public:
 
     // Layers -------------------------------------------------------
 
     virtual WebLayer* createLayer() { return nullptr; }
 
     virtual WebLayer* createLayerFromCCLayer(cc::Layer*) { return nullptr; }
 
     virtual WebContentLayer* createContentLayer(WebContentLayerClient*) { return nullptr; }
 
-    virtual WebExternalTextureLayer* createExternalTextureLayer(WebExternalTextureLayerClient*) { return nullptr; }
+    virtual WebExternalTextureLayer* createExternalTextureLayer(cc::TextureLayerClient*) { return nullptr; }
 
     virtual WebImageLayer* createImageLayer() { return nullptr; }
 
     // The ownership of the WebScrollbarThemeGeometry pointer is passed to Chromium.
     virtual WebScrollbarLayer* createScrollbarLayer(WebScrollbar*, WebScrollbarThemePainter, WebScrollbarThemeGeometry*) { return nullptr; }
 
     virtual WebScrollbarLayer* createSolidColorScrollbarLayer(WebScrollbar::Orientation, int thumbThickness, int trackStart, bool isLeftSideVerticalScrollbar) { return nullptr; }
 
 protected:
     virtual ~WebCompositorSupport() { }
 };
 
 }
 
 #endif // WebCompositorSupport_h