Implement HTMLMarqueeElement's animation in private scripts

Source/core/html/HTMLMarqueeElement.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2007, 2010 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  *
  */
 
 #ifndef HTMLMarqueeElement_h
 #define HTMLMarqueeElement_h
 
-#include "core/dom/ActiveDOMObject.h"
 #include "core/html/HTMLElement.h"
-#include "platform/Timer.h"
 
 namespace blink {
 
-class RenderMarquee;
-
-class HTMLMarqueeElement FINAL : public HTMLElement, private ActiveDOMObject {
+class HTMLMarqueeElement final : public HTMLElement {
     DEFINE_WRAPPERTYPEINFO();
 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) final;
+    virtual InsertionNotificationRequest insertedInto(ContainerNode*) final;
+    virtual void removedFrom(ContainerNode*) final;
 
 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
 
 #endif // HTMLMarqueeElement_h