Replace RenderArena with PartitionAlloc.

Source/core/html/HTMLVideoElement.cpp

 /*
  * Copyright (C) 2007, 2008, 2009, 2010 Apple Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 46 matching lines @@
     RefPtr<HTMLVideoElement> videoElement(adoptRef(new HTMLVideoElement(tagName, document, createdByParser)));
     videoElement->suspendIfNeeded();
     return videoElement.release();
 }
 
 bool HTMLVideoElement::rendererIsNeeded(const NodeRenderingContext& context) 
 {
     return HTMLElement::rendererIsNeeded(context); 
 }
 
-RenderObject* HTMLVideoElement::createRenderer(RenderArena* arena, RenderStyle*)
+RenderObject* HTMLVideoElement::createRenderer(RenderStyle*)
 {
-    return new (arena) RenderVideo(this);
+    return new RenderVideo(this);
 }
 
 void HTMLVideoElement::attach(const AttachContext& context)
 {
     HTMLMediaElement::attach(context);
 
     updateDisplayState();
     if (shouldDisplayPosterImage()) {
         if (!m_imageLoader)
             m_imageLoader = adoptPtr(new HTMLImageLoader(this));
@@ skipping 196 matching lines @@
 
 KURL HTMLVideoElement::posterImageURL() const
 {
     String url = stripLeadingAndTrailingHTMLSpaces(imageSourceURL());
     if (url.isEmpty())
         return KURL();
     return document()->completeURL(url);
 }
 
 }