Implement HTMLMarqueeElement's animation in private scripts

Source/core/html/HTMLMarqueeElement.h

Index: Source/core/html/HTMLMarqueeElement.h
diff --git a/Source/core/html/HTMLMarqueeElement.h b/Source/core/html/HTMLMarqueeElement.h
index 71b6e23be3d395eeb15e4caf8c35a808f2b02f4c..a6bb8d3d3eb9529b75140ac7b4b64cf8bff1e847 100644
--- a/Source/core/html/HTMLMarqueeElement.h
+++ b/Source/core/html/HTMLMarqueeElement.h
@@ -36,30 +36,12 @@ class HTMLMarqueeElement FINAL : public HTMLElement, private ActiveDOMObject {
 public:
     static PassRefPtrWillBeRawPtr<HTMLMarqueeElement> create(Document&);
 
-    int minimumDelay() const;
-
-    // DOM Functions
-
-    void start();
-    virtual void stop() OVERRIDE;
-
-    void timerFired(Timer<HTMLMarqueeElement>*);
+    virtual void attributeWillChange(const QualifiedName&, const AtomicString& oldValue, const AtomicString& newValue) OVERRIDE;
+    virtual InsertionNotificationRequest insertedInto(ContainerNode*) OVERRIDE;
+    virtual void removedFrom(ContainerNode*) OVERRIDE;
 
 private:
     explicit HTMLMarqueeElement(Document&);
-
-    virtual void didMoveToNewDocument(Document& oldDocument) OVERRIDE;
-
-    virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
-    virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
-
-    // ActiveDOMObject
-    virtual void suspend() OVERRIDE;
-    virtual void resume() OVERRIDE;
-
-    virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
-
-    RenderMarquee* renderMarquee() const;
 };
 
 } // namespace blink