Remove most of 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 4f69957b531c10a437b86db12fc685de6a5ab5df..ef8cc55bbda0013c9b09ed31cf1824be84620300 100644
--- a/Source/core/dom/shadow/ShadowRoot.h
+++ b/Source/core/dom/shadow/ShadowRoot.h
@@ -81,8 +81,8 @@ public:
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
     virtual void removedFrom(ContainerNode*) OVERRIDE;
 
-    virtual void registerScopedHTMLStyleChild() OVERRIDE;
-    virtual void unregisterScopedHTMLStyleChild() OVERRIDE;
+    void registerScopedHTMLStyleChild();
+    void unregisterScopedHTMLStyleChild();
 
     bool containsShadowElements() const;
     bool containsContentElements() const;
@@ -93,6 +93,7 @@ public:
 
     // For Internals, don't use this.
     unsigned childShadowRootCount() const;
+    unsigned numberOfStyles() const { return m_numberOfStyles; }
 
     HTMLShadowElement* shadowInsertionPointOfYoungerShadowRoot() const;
     void setShadowInsertionPointOfYoungerShadowRoot(PassRefPtr<HTMLShadowElement>);