Reduce forward declarations in core/svg

Source/core/svg/graphics/SVGImage.h

 /*
  * Copyright (C) 2006 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Apple 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 15 matching lines @@
 
 #ifndef SVGImage_h
 #define SVGImage_h
 
 #include "platform/graphics/Image.h"
 #include "platform/heap/Handle.h"
 #include "platform/weborigin/KURL.h"
 
 namespace WebCore {
 
-class Element;
 class FrameView;
-class ImageBuffer;
 class Page;
 class RenderBox;
 class SVGImageChromeClient;
 class SVGImageForContainer;
 
 class SVGImage FINAL : public Image {
 public:
     static PassRefPtr<SVGImage> create(ImageObserver* observer)
     {
         return adoptRef(new SVGImage(observer));
@@ skipping 75 matching lines @@
         m_image->setImageObserver(m_observer);
     }
 private:
     Image* m_image;
     ImageObserver* m_observer;
 };
 
 }
 
 #endif // SVGImage_h