Reduce forward declarations in core/rendering

Source/core/rendering/style/RenderStyle.h

 /*
  * Copyright (C) 2000 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Antti Koivisto (koivisto@kde.org)
  *           (C) 2000 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2003, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  * Copyright (C) 2006 Graham Dennis (graham.dennis@gmail.com)
  *
  * 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
@@ skipping 86 matching lines @@
 
 using std::max;
 
 class FilterOperations;
 
 class AppliedTextDecoration;
 class BorderData;
 class CounterContent;
 class Font;
 class FontMetrics;
-class IntRect;
-class Pair;
 class ShadowList;
 class StyleImage;
 class StyleInheritedData;
 class StyleResolver;
 class TransformationMatrix;
 
 class ContentData;
 
 typedef Vector<RefPtr<RenderStyle>, 4> PseudoStyleCache;
 
@@ skipping 1771 matching lines @@
 inline bool RenderStyle::hasPseudoElementStyle() const
 {
     return noninherited_flags._pseudoBits & PSEUDO_ELEMENT_MASK;
 }
 
 float calcBorderRadiiConstraintScaleFor(const FloatRect&, const FloatRoundedRect::Radii&);
 
 } // namespace WebCore
 
 #endif // RenderStyle_h