Reduce forward declarations in core/rendering

Source/core/rendering/style/SVGRenderStyle.h

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005 Rob Buis <buis@kde.org>
     Copyright (C) 2005, 2006 Apple Computer, Inc.
     Copyright (C) Research In Motion Limited 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.
@@ skipping 17 matching lines @@
 #include "core/rendering/style/DataRef.h"
 #include "core/rendering/style/RenderStyleConstants.h"
 #include "core/rendering/style/SVGRenderStyleDefs.h"
 #include "core/rendering/style/StyleDifference.h"
 #include "core/svg/SVGPaint.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "platform/graphics/Path.h"
 
 namespace WebCore {
 
-class FloatRect;
-class IntRect;
-class RenderObject;
-
 class SVGRenderStyle : public RefCounted<SVGRenderStyle> {
 public:
     static PassRefPtr<SVGRenderStyle> create() { return adoptRef(new SVGRenderStyle); }
     PassRefPtr<SVGRenderStyle> copy() const { return adoptRef(new SVGRenderStyle(*this));}
     ~SVGRenderStyle();
 
     bool inheritedNotEqual(const SVGRenderStyle*) const;
     void inheritFrom(const SVGRenderStyle*);
     void copyNonInheritedFrom(const SVGRenderStyle*);
 
@@ skipping 401 matching lines @@
         svg_noninherited_flags.f._baselineShift = initialBaselineShift();
         svg_noninherited_flags.f._vectorEffect = initialVectorEffect();
         svg_noninherited_flags.f.bufferedRendering = initialBufferedRendering();
         svg_noninherited_flags.f.maskType = initialMaskType();
     }
 };
 
 } // namespace WebCore
 
 #endif // SVGRenderStyle_h