Implement Custom Elements' attributeChangedCallback.

Source/bindings/v8/V8CustomElementLifecycleCallbacks.h

Index: Source/bindings/v8/V8CustomElementLifecycleCallbacks.h
diff --git a/Source/bindings/v8/V8CustomElementLifecycleCallbacks.h b/Source/bindings/v8/V8CustomElementLifecycleCallbacks.h
index 43ca667acee34e3407868a5061b30a7e63317d31..56664aa692dbd2c7bdff8e88ccdf650ae64b1b36 100644
--- a/Source/bindings/v8/V8CustomElementLifecycleCallbacks.h
+++ b/Source/bindings/v8/V8CustomElementLifecycleCallbacks.h
@@ -44,18 +44,20 @@ class ScriptExecutionContext;
 
 class V8CustomElementLifecycleCallbacks : public CustomElementLifecycleCallbacks, ActiveDOMCallback {
 public:
-    static PassRefPtr<V8CustomElementLifecycleCallbacks> create(ScriptExecutionContext*, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created);
+    static PassRefPtr<V8CustomElementLifecycleCallbacks> create(ScriptExecutionContext*, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> attributeChanged);
 
     virtual ~V8CustomElementLifecycleCallbacks() { }
 
 private:
-    V8CustomElementLifecycleCallbacks(ScriptExecutionContext*, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created);
+    V8CustomElementLifecycleCallbacks(ScriptExecutionContext*, v8::Handle<v8::Object> prototype, v8::Handle<v8::Function> created, v8::Handle<v8::Function> attributeChanged);
 
     virtual void created(Element*) OVERRIDE;
+    virtual void attributeChanged(Element*, const AtomicString& name, const AtomicString& oldValue, const AtomicString& newValue) OVERRIDE;
 
     RefPtr<DOMWrapperWorld> m_world;
     ScopedPersistent<v8::Object> m_prototype;
     ScopedPersistent<v8::Function> m_created;
+    ScopedPersistent<v8::Function> m_attributeChanged;
 };
 
 }