Reduce forward declarations in core/rendering

Source/core/rendering/style/SVGRenderStyleDefs.h

 /*
     Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005 Rob Buis <buis@kde.org>
     Copyright (C) Research In Motion Limited 2010. All rights reserved.
 
     Based on khtml code by:
     Copyright (C) 2000-2003 Lars Knoll (knoll@kde.org)
               (C) 2000 Antti Koivisto (koivisto@kde.org)
               (C) 2000-2003 Dirk Mueller (mueller@kde.org)
               (C) 2002-2003 Apple Computer, Inc.
@@ skipping 86 matching lines @@
         PT_NONE    = 0,
         PT_FILL    = 1,
         PT_STROKE  = 2,
         PT_MARKERS = 3
     };
 
     const int kPaintOrderBitwidth = 2;
     typedef unsigned EPaintOrder;
     const unsigned PO_NORMAL = PT_FILL | PT_STROKE << 2 | PT_MARKERS << 4;
 
-    class CSSValue;
-    class CSSValueList;
-    class SVGPaint;
-
     // Inherited/Non-Inherited Style Datastructures
     class StyleFillData : public RefCounted<StyleFillData> {
     public:
         static PassRefPtr<StyleFillData> create() { return adoptRef(new StyleFillData); }
         PassRefPtr<StyleFillData> copy() const { return adoptRef(new StyleFillData(*this)); }
 
         bool operator==(const StyleFillData&) const;
         bool operator!=(const StyleFillData& other) const
         {
             return !(*this == other);
@@ skipping 122 matching lines @@
         AtomicString markerEnd;
 
     private:
         StyleInheritedResourceData();
         StyleInheritedResourceData(const StyleInheritedResourceData&);
     };
 
 } // namespace WebCore
 
 #endif // SVGRenderStyleDefs_h