Revert "Replace style sharing cousin list search with LRU"

Source/core/css/resolver/SharedStyleFinder.h

 /*
  * Copyright (C) 2013 Google, Inc.
  * 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.
  *
@@ skipping 33 matching lines @@
         , m_features(features)
         , m_siblingRuleSet(siblingRuleSet)
         , m_uncommonAttributeRuleSet(uncommonAttributeRuleSet)
         , m_styleResolver(styleResolver)
     { }
 
     // FIXME: It is not necessarily safe to call this method more than once.
     RenderStyle* locateSharedStyle(const ElementResolveContext&, RenderStyle* newStyle);
 
 private:
-    Element* findElementForStyleSharing(const ElementResolveContext&) const;
+    Node* locateCousinList(Element* parent, unsigned& visitedNodeCount) const;
+    Element* findSiblingForStyleSharing(const ElementResolveContext&, Node*, unsigned& count) const;
 
     // Only used when we're collecting stats on styles
     Element* searchDocumentForSharedStyle(const ElementResolveContext&) const;
 
     bool classNamesAffectedByRules(const SpaceSplitString&) const;
 
     bool canShareStyleWithElement(const ElementResolveContext&, Element*) const;
     bool canShareStyleWithControl(const ElementResolveContext&, Element*) const;
     bool sharingCandidateHasIdenticalStyleAffectingAttributes(const ElementResolveContext&, Element*) const;
 
     bool m_elementAffectedByClassRules;
     const RuleFeatureSet& m_features;
     RuleSet* m_siblingRuleSet;
     RuleSet* m_uncommonAttributeRuleSet;
     StyleResolver* m_styleResolver;
 };
 
 } // namespace WebCore
 
 #endif // SharedStyleFinder_h