blink: Cleanup class forward declarations

third_party/WebKit/Source/platform/graphics/ContentLayerDelegate.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
  *     notice, this list of conditions and the following disclaimer in the
@@ skipping 14 matching lines @@
 
 #ifndef ContentLayerDelegate_h
 #define ContentLayerDelegate_h
 
 #include "platform/PlatformExport.h"
 #include "platform/geometry/IntSize.h"
 #include "public/platform/WebContentLayerClient.h"
 #include "wtf/Allocator.h"
 #include "wtf/Noncopyable.h"
 
-class SkCanvas;
-
 namespace gfx {
 class Rect;
 }
 
 namespace blink {
 
-class IntRect;
 class GraphicsLayer;
 
 class PLATFORM_EXPORT ContentLayerDelegate : public WebContentLayerClient {
   WTF_MAKE_NONCOPYABLE(ContentLayerDelegate);
   USING_FAST_MALLOC(ContentLayerDelegate);
 
  public:
   explicit ContentLayerDelegate(GraphicsLayer*);
   ~ContentLayerDelegate() override;
 
   gfx::Rect paintableRegion() override;
 
   // WebContentLayerClient implementation.
   void paintContents(WebDisplayItemList*,
                      WebContentLayerClient::PaintingControlSetting =
                          PaintDefaultBehavior) override;
   size_t approximateUnsharedMemoryUsage() const override;
 
  private:
   GraphicsLayer* m_graphicsLayer;
 };
 
 }  // namespace blink
 
 #endif  // ContentLayerDelegate_h