Stop RenderProgress timer on destruction.

Source/core/rendering/RenderProgress.h

 /*
  * Copyright (C) 2009 Nokia Corporation and/or its subsidiary(-ies).
  *
  * 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
@@ skipping 13 matching lines @@
 #include "core/rendering/RenderBlockFlow.h"
 
 namespace blink {
 
 class HTMLProgressElement;
 
 class RenderProgress FINAL : public RenderBlockFlow {
 public:
     explicit RenderProgress(HTMLElement*);
     virtual ~RenderProgress();
+    virtual void destroy() OVERRIDE;
 
     double position() const { return m_position; }
     double animationProgress() const;
     double animationStartTime() const { return m_animationStartTime; }
 
     bool isDeterminate() const;
     virtual void updateFromElement() OVERRIDE;
 
     HTMLProgressElement* progressElement() const;
 
@@ skipping 10 matching lines @@
     double m_animationDuration;
     bool m_animating;
     Timer<RenderProgress> m_animationTimer;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderProgress, isProgress());
 
 } // namespace blink
 
 #endif // RenderProgress_h