Replace RenderArena with PartitionAlloc.

Source/core/html/HTMLImageElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2008, 2010 Apple Inc. All rights reserved.
  * Copyright (C) 2010 Google 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.
@@ skipping 120 matching lines @@
     // lets figure out the alt text.. magic stuff
     // http://www.w3.org/TR/1998/REC-html40-19980424/appendix/notes.html#altgen
     // also heavily discussed by Hixie on bugzilla
     String alt = getAttribute(altAttr);
     // fall back to title attribute
     if (alt.isNull())
         alt = getAttribute(titleAttr);
     return alt;
 }
 
-RenderObject* HTMLImageElement::createRenderer(RenderArena* arena, RenderStyle* style)
+RenderObject* HTMLImageElement::createRenderer(RenderStyle* style)
 {
     if (style->hasContent())
         return RenderObject::createObject(this, style);
 
-    RenderImage* image = new (arena) RenderImage(this);
+    RenderImage* image = new RenderImage(this);
     image->setImageResource(RenderImageResource::create());
     return image;
 }
 
 bool HTMLImageElement::canStartSelection() const
 {
     if (shadow())
         return HTMLElement::canStartSelection();
 
     return false;
@@ skipping 206 matching lines @@
 
 void HTMLImageElement::reportMemoryUsage(MemoryObjectInfo* memoryObjectInfo) const
 {
     MemoryClassInfo info(memoryObjectInfo, this, WebCoreMemoryTypes::DOM);
     HTMLElement::reportMemoryUsage(memoryObjectInfo);
     info.addMember(m_imageLoader, "imageLoader");
     info.addMember(m_form, "form");
 }
 
 }