Revert of Remove scoped styles.

Source/core/dom/shadow/ShadowRoot.h

Index: Source/core/dom/shadow/ShadowRoot.h
diff --git a/Source/core/dom/shadow/ShadowRoot.h b/Source/core/dom/shadow/ShadowRoot.h
index 73ea4ae1be678b0facab76c782fa8b951eb1d156..64b243973464cdc83e1ee4b92230ee208904ff78 100644
--- a/Source/core/dom/shadow/ShadowRoot.h
+++ b/Source/core/dom/shadow/ShadowRoot.h
@@ -83,8 +83,8 @@
     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;
@@ -95,7 +95,6 @@
 
     // For Internals, don't use this.
     unsigned childShadowRootCount() const;
-    unsigned numberOfStyles() const { return m_numberOfStyles; }
 
     HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const;
     void setShadowInsertionPointOfYoungerShadowRoot(PassRefPtrWillBeRawPtr<HTMLShadowElement>);