Replace RenderArena with PartitionAlloc.

Source/core/html/shadow/MeterShadowElement.cpp

 /*
  * Copyright (C) 2011 Google 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 61 matching lines @@
 
 bool MeterInnerElement::rendererIsNeeded(const NodeRenderingContext& context)
 {
     if (meterElement()->hasAuthorShadowRoot())
         return HTMLDivElement::rendererIsNeeded(context);
 
     RenderObject* render = meterElement()->renderer();
     return render && !render->theme()->supportsMeter(render->style()->appearance()) && HTMLDivElement::rendererIsNeeded(context);
 }
 
-RenderObject* MeterInnerElement::createRenderer(RenderArena* arena, RenderStyle*)
+RenderObject* MeterInnerElement::createRenderer(RenderStyle*)
 {
-    return new (arena) RenderMeter(this);
+    return new RenderMeter(this);
 }
 
 inline MeterBarElement::MeterBarElement(Document* document)
     : MeterShadowElement(document)
 {
 }
 
 PassRefPtr<MeterBarElement> MeterBarElement::create(Document* document)
 {
     RefPtr<MeterBarElement> element = adoptRef(new MeterBarElement(document));
@@ skipping 35 matching lines @@
         return optimumPseudoId;
     }
 }
 
 void MeterValueElement::setWidthPercentage(double width)
 {
     setInlineStyleProperty(CSSPropertyWidth, width, CSSPrimitiveValue::CSS_PERCENTAGE);
 }
 
 }