Reduce forward declarations in core/rendering

Source/core/rendering/svg/RenderSVGResource.h

 /*
  * Copyright (C) Research In Motion Limited 2009-2010. 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 27 matching lines @@
 
 // If this enum changes change the unsigned bitfields using it.
 enum RenderSVGResourceMode {
     ApplyToDefaultMode = 1 << 0, // used for all resources except gradient/pattern
     ApplyToFillMode    = 1 << 1,
     ApplyToStrokeMode  = 1 << 2,
     ApplyToTextMode    = 1 << 3 // used in combination with ApplyTo{Fill|Stroke}Mode
 };
 typedef unsigned RenderSVGResourceModeFlags;
 
-class Color;
-class FloatRect;
 class GraphicsContext;
 class Path;
 class RenderObject;
 class RenderStyle;
 class RenderSVGResourceSolidColor;
 
 class RenderSVGResource {
 public:
     RenderSVGResource() { }
     virtual ~RenderSVGResource() { }
@@ skipping 23 matching lines @@
 
     static void markForLayoutAndParentResourceInvalidation(RenderObject*, bool needsLayout = true);
 };
 
 #define DEFINE_RENDER_SVG_RESOURCE_TYPE_CASTS(thisType, typeName) \
     DEFINE_TYPE_CASTS(thisType, RenderSVGResource, resource, resource->resourceType() == typeName, resource.resourceType() == typeName)
 
 }
 
 #endif