Reduce forward declarations in core/svg

Source/core/svg/graphics/SVGImageCache.h

 /*
  * Copyright (C) 2011 Research In Motion Limited. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 11 matching lines @@
 
 #include "platform/geometry/FloatSize.h"
 #include "platform/geometry/IntSize.h"
 #include "platform/graphics/Image.h"
 #include "wtf/HashMap.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace WebCore {
 
-class ImageResource;
 class ImageResourceClient;
-class ImageBuffer;
 class SVGImage;
 class SVGImageForContainer;
 class RenderObject;
 
 class SVGImageCache {
     WTF_MAKE_FAST_ALLOCATED;
 public:
     ~SVGImageCache();
 
     static PassOwnPtr<SVGImageCache> create(SVGImage* image)
@@ skipping 13 matching lines @@
 
     typedef HashMap<const ImageResourceClient*, RefPtr<SVGImageForContainer> > ImageForContainerMap;
 
     SVGImage* m_svgImage;
     ImageForContainerMap m_imageForContainerMap;
 };
 
 } // namespace WebCore
 
 #endif // SVGImageCache_h