Remove AtomicStringImpl.

Source/core/dom/shadow/SelectRuleFeatureSet.h

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 50 matching lines @@
 private:
     void setSelectRuleFeature(AffectedSelectorType feature) { m_featureFlags |= feature; }
 
     RuleFeatureSet m_cssRuleFeatureSet;
     int m_featureFlags;
 };
 
 inline bool SelectRuleFeatureSet::hasSelectorForId(const AtomicString& idValue) const
 {
     ASSERT(!idValue.isEmpty());
-    return m_cssRuleFeatureSet.idsInRules.contains(idValue.impl());
+    return m_cssRuleFeatureSet.idsInRules.contains(idValue);
 }
 
 inline bool SelectRuleFeatureSet::hasSelectorForClass(const AtomicString& classValue) const
 {
     ASSERT(!classValue.isEmpty());
-    return m_cssRuleFeatureSet.classesInRules.contains(classValue.impl());
+    return m_cssRuleFeatureSet.classesInRules.contains(classValue);
 }
 
 inline bool SelectRuleFeatureSet::hasSelectorForAttribute(const AtomicString& attributeName) const
 {
     ASSERT(!attributeName.isEmpty());
-    return m_cssRuleFeatureSet.attrsInRules.contains(attributeName.impl());
+    return m_cssRuleFeatureSet.attrsInRules.contains(attributeName);
 }
 
 }
 
 #endif