blink: Cleanup class/struct forward declarations

third_party/WebKit/public/platform/WebContentLayerClient.h

 /*
  * Copyright (C) 2011 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 WebContentLayerClient_h
 
 #include "WebCommon.h"
 
 namespace gfx {
 class Rect;
 }
 
 namespace blink {
 
-struct WebRect;
 class WebDisplayItemList;
 
 class BLINK_PLATFORM_EXPORT WebContentLayerClient {
  public:
   enum PaintingControlSetting {
     // Returns the last PaintArtifact produced.
     PaintDefaultBehavior,
     // Paints the content to simulate the behavior of
     // FrameView::synchronizedPaint.
     PaintDefaultBehaviorForTest,
@@ skipping 27 matching lines @@
   // result includes data cached internally during painting.
   virtual size_t approximateUnsharedMemoryUsage() const { return 0; }
 
  protected:
   virtual ~WebContentLayerClient() {}
 };
 
 }  // namespace blink
 
 #endif  // WebContentLayerClient_h