Oilpan: RenderImageResource::shutdown should be called earlier.

Source/core/rendering/RenderImage.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2006 Allan Sandfeld Jensen (kde@carewolf.com)
  *           (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2007, 2009, 2010, 2011 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
@@ skipping 19 matching lines @@
 
 namespace blink {
 
 class HTMLAreaElement;
 class HTMLMapElement;
 
 class RenderImage : public RenderReplaced {
 public:
     RenderImage(Element*);
     virtual ~RenderImage();
+    virtual void destroy() OVERRIDE;
 
     static RenderImage* createAnonymous(Document*);
 
     void setImageResource(PassOwnPtr<RenderImageResource>);
 
     RenderImageResource* imageResource() { return m_imageResource.get(); }
     const RenderImageResource* imageResource() const { return m_imageResource.get(); }
     ImageResource* cachedImage() const { return m_imageResource ? m_imageResource->cachedImage() : 0; }
 
     bool setImageSizeForAltText(ImageResource* newImage = 0);
@@ skipping 66 matching lines @@
     float m_imageDevicePixelRatio;
 
     friend class RenderImageScaleObserver;
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderImage, isRenderImage());
 
 } // namespace blink
 
 #endif // RenderImage_h