Replace RenderArena with PartitionAlloc.

Source/core/rendering/RenderMenuList.cpp

 /*
  * This file is part of the select element renderer in WebCore.
  *
  * Copyright (C) 2010 Nokia Corporation and/or its subsidiary(-ies).
  * Copyright (C) 2006, 2007, 2008, 2009, 2010, 2011 Apple Inc. All rights reserved.
  *               2009 Torch Mobile Inc. All rights reserved. (http://www.torchmobile.com/)
  *
  * 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 218 matching lines @@
     setText(text.stripWhiteSpace());
     didUpdateActiveOption(optionIndex);
 }
 
 void RenderMenuList::setText(const String& s)
 {
     if (s.isEmpty()) {
         if (!m_buttonText || !m_buttonText->isBR()) {
             if (m_buttonText)
                 m_buttonText->destroy();
-            m_buttonText = new (renderArena()) RenderBR(document());
+            m_buttonText = new RenderBR(document());
             m_buttonText->setStyle(style());
             addChild(m_buttonText);
         }
     } else {
         if (m_buttonText && !m_buttonText->isBR())
             m_buttonText->setText(s.impl(), true);
         else {
             if (m_buttonText)
                 m_buttonText->destroy();
-            m_buttonText = new (renderArena()) RenderText(document(), s.impl());
+            m_buttonText = new RenderText(document(), s.impl());
             m_buttonText->setStyle(style());
             // We need to set the text explicitly though it was specified in the
             // constructor because RenderText doesn't refer to the text
             // specified in the constructor in a case of re-transforming.
             m_buttonText->setText(s.impl(), true);
             addChild(m_buttonText);
         }
         adjustInnerStyle();
     }
 }
@@ skipping 346 matching lines @@
 {
     setTextFromOption(selectElement()->listToOptionIndex(listIndex));
 }
 
 FontSelector* RenderMenuList::fontSelector() const
 {
     return document()->styleResolver()->fontSelector();
 }
 
 }