Remove most of scoped styles.

Source/core/html/HTMLStyleElement.h

Index: Source/core/html/HTMLStyleElement.h
diff --git a/Source/core/html/HTMLStyleElement.h b/Source/core/html/HTMLStyleElement.h
index c058e8fa03a14bcb10230af78ff8adeec628cedb..e0f0cbab35fc63bb1a0e9bade881fc3413b7c702 100644
--- a/Source/core/html/HTMLStyleElement.h
+++ b/Source/core/html/HTMLStyleElement.h
@@ -41,22 +41,8 @@ public:
 
     void setType(const AtomicString&);
 
-    bool scoped() const;
-    void setScoped(bool);
     ContainerNode* scopingNode();
-    bool isRegisteredAsScoped() const
-    {
-        // Note: We cannot rely on the 'scoped' attribute still being present when this method is invoked.
-        // Therefore we cannot rely on scoped()!
-        if (m_scopedStyleRegistrationState == NotRegistered)
-            return false;
-        return true;
-    }
-
-    bool isRegisteredInShadowRoot() const
-    {
-        return m_scopedStyleRegistrationState == RegisteredInShadowRoot;
-    }
+    bool isScoped() const { return m_scoped; }
 
     using StyleElement::sheet;
 
@@ -85,19 +71,9 @@ private:
     virtual const AtomicString& media() const OVERRIDE;
     virtual const AtomicString& type() const OVERRIDE;
 
-    void scopedAttributeChanged(bool);
-    void registerWithScopingNode(bool);
-    void unregisterWithScopingNode(ContainerNode*);
-
     bool m_firedLoad;
     bool m_loadedSheet;
-
-    enum ScopedStyleRegistrationState {
-        NotRegistered,
-        RegisteredAsScoped,
-        RegisteredInShadowRoot
-    };
-    ScopedStyleRegistrationState m_scopedStyleRegistrationState;
+    bool m_scoped;
 };
 
 } //namespace