Make CSSToStyleMap static.

Source/core/css/resolver/StyleResolverState.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  * Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. 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,
@@ skipping 95 matching lines @@
 
         m_cachedUAStyle = CachedUAStyle::create(style());
     }
 
     const CachedUAStyle* cachedUAStyle() const
     {
         return m_cachedUAStyle.get();
     }
 
     ElementStyleResources& elementStyleResources() { return m_elementStyleResources; }
-    const CSSToStyleMap& styleMap() const { return m_styleMap; }
-    CSSToStyleMap& styleMap() { return m_styleMap; }
 
     // FIXME: Once styleImage can be made to not take a StyleResolverState
     // this convenience function should be removed. As-is, without this, call
     // sites are extremely verbose.
     PassRefPtr<StyleImage> styleImage(CSSPropertyID propertyId, CSSValue* value)
     {
         return m_elementStyleResources.styleImage(document(), document().textLinkColors(), style()->color(), propertyId, value);
     }
 
     FontBuilder& fontBuilder() { return m_fontBuilder; }
@@ skipping 24 matching lines @@
     OwnPtrWillBeMember<CSSAnimationUpdate> m_animationUpdate;
 
     bool m_applyPropertyToRegularStyle;
     bool m_applyPropertyToVisitedLinkStyle;
 
     FontBuilder m_fontBuilder;
 
     OwnPtr<CachedUAStyle> m_cachedUAStyle;
 
     ElementStyleResources m_elementStyleResources;
-    // CSSToStyleMap is a pure-logic class and only contains
-    // a back-pointer to this object.
-    CSSToStyleMap m_styleMap;
     Vector<AtomicString> m_contentAttrValues;
 };
 
 } // namespace blink
 
 #endif // StyleResolverState_h