Replace RenderArena with PartitionAlloc.

Source/core/html/HTMLTextAreaElement.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, 2008, 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 186 matching lines @@
                 renderer()->setNeedsLayoutAndPrefWidthsRecalc();
         }
     } else if (name == accesskeyAttr) {
         // ignore for the moment
     } else if (name == maxlengthAttr)
         setNeedsValidityCheck();
     else
         HTMLTextFormControlElement::parseAttribute(name, value);
 }
 
-RenderObject* HTMLTextAreaElement::createRenderer(RenderArena* arena, RenderStyle*)
+RenderObject* HTMLTextAreaElement::createRenderer(RenderStyle*)
 {
-    return new (arena) RenderTextControlMultiLine(this);
+    return new RenderTextControlMultiLine(this);
 }
 
 bool HTMLTextAreaElement::appendFormData(FormDataList& encoding, bool)
 {
     if (name().isEmpty())
         return false;
 
     document()->updateLayout();
 
     const String& text = (m_wrap == HardWrap) ? valueWithHardLineBreaks() : value();
@@ skipping 329 matching lines @@
         RefPtr<HTMLDivElement> placeholder = HTMLDivElement::create(document());
         m_placeholder = placeholder.get();
         m_placeholder->setPseudo(AtomicString("-webkit-input-placeholder", AtomicString::ConstructFromLiteral));
         userAgentShadowRoot()->insertBefore(m_placeholder, innerTextElement()->nextSibling(), ASSERT_NO_EXCEPTION);
     }
     m_placeholder->setInnerText(placeholderText, ASSERT_NO_EXCEPTION);
     fixPlaceholderRenderer(m_placeholder, innerTextElement());
 }
 
 }