Revert of Remove scoped styles.

Source/core/dom/shadow/ShadowRoot.h

 /*
  * Copyright (C) 2011 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 65 matching lines @@
 
     bool isYoungest() const { return !youngerShadowRoot(); }
     bool isOldest() const { return !olderShadowRoot(); }
     bool isOldestAuthorShadowRoot() const;
 
     virtual void attach(const AttachContext& = AttachContext()) OVERRIDE;
 
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
-    void registerScopedHTMLStyleChild();
-    void unregisterScopedHTMLStyleChild();
+    virtual void registerScopedHTMLStyleChild() OVERRIDE;
+    virtual void unregisterScopedHTMLStyleChild() OVERRIDE;
 
     bool containsShadowElements() const;
     bool containsContentElements() const;
     bool containsInsertionPoints() const { return containsShadowElements() || containsContentElements(); }
     bool containsShadowRoots() const;
 
     unsigned descendantShadowElementCount() const;
 
     // For Internals, don't use this.
     unsigned childShadowRootCount() const;
-    unsigned numberOfStyles() const { return m_numberOfStyles; }
 
     HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const;
     void setShadowInsertionPointOfYoungerShadowRoot(PassRefPtrWillBeRawPtr<HTMLShadowElement>);
 
     void didAddInsertionPoint(InsertionPoint*);
     void didRemoveInsertionPoint(InsertionPoint*);
     const WillBeHeapVector<RefPtrWillBeMember<InsertionPoint> >& descendantInsertionPoints();
 
     ShadowRootType type() const { return static_cast<ShadowRootType>(m_type); }
 
@@ skipping 51 matching lines @@
 {
     return adjustedFocusedElement();
 }
 
 DEFINE_NODE_TYPE_CASTS(ShadowRoot, isShadowRoot());
 DEFINE_TYPE_CASTS(ShadowRoot, TreeScope, treeScope, treeScope->rootNode().isShadowRoot(), treeScope.rootNode().isShadowRoot());
 
 } // namespace
 
 #endif