Replace RenderArena with PartitionAlloc.

Source/core/html/HTMLButtonElement.cpp

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 1999 Antti Koivisto (koivisto@kde.org)
  *           (C) 2001 Dirk Mueller (mueller@kde.org)
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Apple Inc. All rights reserved.
  *           (C) 2006 Alexey Proskuryakov (ap@nypop.com)
  * Copyright (C) 2007 Samuel Weinig (sam@webkit.org)
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
@@ skipping 40 matching lines @@
 PassRefPtr<HTMLButtonElement> HTMLButtonElement::create(const QualifiedName& tagName, Document* document, HTMLFormElement* form)
 {
     return adoptRef(new HTMLButtonElement(tagName, document, form));
 }
 
 void HTMLButtonElement::setType(const AtomicString& type)
 {
     setAttribute(typeAttr, type);
 }
 
-RenderObject* HTMLButtonElement::createRenderer(RenderArena* arena, RenderStyle*)
+RenderObject* HTMLButtonElement::createRenderer(RenderStyle*)
 {
-    return new (arena) RenderButton(this);
+    return new RenderButton(this);
 }
 
 const AtomicString& HTMLButtonElement::formControlType() const
 {
     switch (m_type) {
         case SUBMIT: {
             DEFINE_STATIC_LOCAL(const AtomicString, submit, ("submit", AtomicString::ConstructFromLiteral));
             return submit;
         }
         case BUTTON: {
@@ skipping 127 matching lines @@
 {
     return getAttribute(valueAttr);
 }
 
 bool HTMLButtonElement::recalcWillValidate() const
 {
     return m_type == SUBMIT && HTMLFormControlElement::recalcWillValidate();
 }
 
 } // namespace