Replace RenderArena with PartitionAlloc

Source/core/svg/SVGRectElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>
  *
  * 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,
@@ skipping 142 matching lines @@
     return xCurrentValue().isRelative()
         || yCurrentValue().isRelative()
         || widthCurrentValue().isRelative()
         || heightCurrentValue().isRelative()
         || rxCurrentValue().isRelative()
         || ryCurrentValue().isRelative();
 }
 
 RenderObject* SVGRectElement::createRenderer(RenderStyle*)
 {
-    return new (document()->renderArena()) RenderSVGRect(this);
+    return new RenderSVGRect(this);
 }
 
 }