Use the HashSet of attribute names in SharedStyleFinder.

sky/engine/core/css/RuleFeature.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 16 matching lines @@
 #include "sky/engine/wtf/HashSet.h"
 #include "sky/engine/wtf/text/AtomicStringHash.h"
 
 namespace blink {
 
 class CSSSelectorList;
 class Element;
 class QualifiedName;
 class RuleData;
 class SpaceSplitString;
-class StyleRule;
-
-struct RuleFeature {
-    RuleFeature(StyleRule* rule, unsigned selectorIndex)
-        : rule(rule)
-        , selectorIndex(selectorIndex)
-    {
-    }
-
-    StyleRule* rule;
-    unsigned selectorIndex;
-};
 
 class RuleFeatureSet {
 public:
     RuleFeatureSet();
     ~RuleFeatureSet();
 
     void add(const RuleFeatureSet&);
     void clear();
 
     void collectFeaturesFromSelector(const CSSSelector&);
-    void collectFeaturesFromRuleData(const RuleData&);
 
     inline bool hasSelectorForAttribute(const AtomicString& attributeName) const
     {
         ASSERT(!attributeName.isEmpty());
         return m_attributeNames.contains(attributeName);
     }
 
     inline bool hasSelectorForClass(const AtomicString& classValue) const
     {
         ASSERT(!classValue.isEmpty());
         return m_classNames.contains(classValue);
     }
 
     inline bool hasSelectorForId(const AtomicString& idValue) const
     {
         ASSERT(!idValue.isEmpty());
         return m_idNames.contains(idValue);
     }
 
     void scheduleStyleInvalidationForClassChange(const SpaceSplitString& changedClasses, Element&);
     void scheduleStyleInvalidationForClassChange(const SpaceSplitString& oldClasses, const SpaceSplitString& newClasses, Element&);
 
     void scheduleStyleInvalidationForClassChange(const AtomicString& className, Element& element);
     void scheduleStyleInvalidationForAttributeChange(const QualifiedName& attributeName, Element&);
     void scheduleStyleInvalidationForIdChange(const AtomicString& oldId, const AtomicString& newId, Element&);
 
-    Vector<RuleFeature> attributeRules;
-
 private:
     void addSelectorFeatures(const CSSSelector&);
     void collectFeaturesFromSelectorList(const CSSSelectorList*);
 
     HashSet<AtomicString> m_classNames;
     HashSet<AtomicString> m_attributeNames;
     HashSet<AtomicString> m_idNames;
 };
 
-
 } // namespace blink
 
-namespace WTF {
-
-template <> struct VectorTraits<blink::RuleFeature> : VectorTraitsBase<blink::RuleFeature> {
-    static const bool needsDestruction = false;
-    static const bool canInitializeWithMemset = true;
-    static const bool canMoveWithMemcpy = true;
-};
-
-} // namespace WTF
-
 #endif  // SKY_ENGINE_CORE_CSS_RULEFEATURE_H_