Revert of Remove scoped styles.

Source/core/dom/ContextFeatures.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.
  *     * Neither the name of Google Inc. nor the names of its
@@ skipping 29 matching lines @@
     USING_GARBAGE_COLLECTED_MIXIN(ContextFeatures);
 public:
     typedef HeapSupplement<Page> SupplementType;
 #else
 class ContextFeatures : public RefCountedSupplement<Page, ContextFeatures> {
 public:
     typedef RefCountedSupplement<Page, ContextFeatures> SupplementType;
 #endif
     enum FeatureType {
         DialogElement = 0,
+        StyleScoped,
         PagePopup,
         MutationEvents,
         PushState,
         FeatureTypeSize // Should be the last entry.
     };
 
     static const char* supplementName();
     static ContextFeatures* defaultSwitch();
     static PassRefPtrWillBeRawPtr<ContextFeatures> create(PassOwnPtr<ContextFeaturesClient>);
 
     static bool dialogElementEnabled(Document*);
+    static bool styleScopedEnabled(Document*);
     static bool pagePopupEnabled(Document*);
     static bool mutationEventsEnabled(Document*);
     static bool pushStateEnabled(Document*);
 
     bool isEnabled(Document*, FeatureType, bool) const;
     void urlDidChange(Document*);
 
 #if ENABLE(OILPAN)
     virtual void trace(Visitor* visitor) OVERRIDE { HeapSupplement<Page>::trace(visitor); }
 #endif
@@ skipping 39 matching lines @@
     // See issue 294180
     //
     // if (m_client)
     //     return;
     // m_client->urlDidChange(document);
 }
 
 } // namespace WebCore
 
 #endif // ContextFeatures_h