Replace RenderArena with PartitionAlloc.

Source/core/html/BaseButtonInputType.cpp

 /*
  * Copyright (C) 2010 Google Inc. All rights reserved.
  * Copyright (C) 2011 Apple 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.
@@ skipping 33 matching lines @@
 {
     return false;
 }
 
 bool BaseButtonInputType::appendFormData(FormDataList&, bool) const
 {
     // Buttons except overridden types are never successful.
     return false;
 }
 
-RenderObject* BaseButtonInputType::createRenderer(RenderArena* arena, RenderStyle*) const
+RenderObject* BaseButtonInputType::createRenderer(RenderStyle*) const
 {
-    return new (arena) RenderButton(element());
+    return new RenderButton(element());
 }
 
 bool BaseButtonInputType::storesValueSeparateFromAttribute()
 {
     return false;
 }
 
 void BaseButtonInputType::setValue(const String& sanitizedValue, bool, TextFieldEventBehavior)
 {
     element()->setAttribute(valueAttr, sanitizedValue);
 }
 
 } // namespace WebCore