Remove AtomicStringImpl.

Source/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 41 matching lines @@
 
     void add(const RuleFeatureSet&);
     void clear();
 
     void collectFeaturesFromSelector(const CSSSelector*);
 
     bool usesSiblingRules() const { return !siblingRules.isEmpty(); }
     bool usesFirstLineRules() const { return m_usesFirstLineRules; }
     bool usesBeforeAfterRules() const { return m_usesBeforeAfterRules; }
 
-    inline bool hasSelectorForAttribute(const AtomicString &attributeName) const
+    inline bool hasSelectorForAttribute(const AtomicString& attributeName) const
     {
         ASSERT(!attributeName.isEmpty());
-        return attrsInRules.contains(attributeName.impl());
+        return attrsInRules.contains(attributeName);
     }
 
     inline bool hasSelectorForClass(const AtomicString& classValue) const
     {
         ASSERT(!classValue.isEmpty());
-        return classesInRules.contains(classValue.impl());
+        return classesInRules.contains(classValue);
     }
 
     inline bool hasSelectorForId(const AtomicString& idValue) const
     {
         ASSERT(!idValue.isEmpty());
-        return idsInRules.contains(idValue.impl());
+        return idsInRules.contains(idValue);
     }
 
     HashSet<AtomicString> idsInRules;
     HashSet<AtomicString> classesInRules;
     HashSet<AtomicString> attrsInRules;
     Vector<RuleFeature> siblingRules;
     Vector<RuleFeature> uncommonAttributeRules;
 private:
     bool m_usesFirstLineRules;
     bool m_usesBeforeAfterRules;
 };
 
 } // namespace WebCore
 
 #endif // RuleFeature_h