Clean up forward declarations in Source/web

Source/web/PageOverlay.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.
  *
@@ skipping 19 matching lines @@
 #define PageOverlay_h
 
 #include "wtf/OwnPtr.h"
 #include "wtf/PassOwnPtr.h"
 
 namespace blink {
 
 class GraphicsContext;
 class GraphicsLayer;
 class GraphicsLayerClient;
-class OverlayGraphicsLayerClientImpl;
 class WebPageOverlay;
 class WebViewImpl;
-struct WebRect;
 
 class PageOverlay {
 public:
     static PassOwnPtr<PageOverlay> create(WebViewImpl*, WebPageOverlay*);
 
     ~PageOverlay() { }
 
     WebPageOverlay* overlay() const { return m_overlay; }
     void setOverlay(WebPageOverlay* overlay) { m_overlay = overlay; }
 
@@ skipping 13 matching lines @@
     WebViewImpl* m_viewImpl;
     WebPageOverlay* m_overlay;
     OwnPtr<GraphicsLayerClient> m_layerClient;
     OwnPtr<GraphicsLayer> m_layer;
     int m_zOrder;
 };
 
 } // namespace blink
 
 #endif // PageOverlay_h