Replace RenderArena with PartitionAlloc.

Source/core/html/shadow/SliderThumbElement.h

 /*
  * Copyright (C) 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
  * Copyright (C) 2010 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.
@@ skipping 45 matching lines @@
     virtual void defaultEventHandler(Event*);
     virtual bool willRespondToMouseMoveEvents() OVERRIDE;
     virtual bool willRespondToMouseClickEvents() OVERRIDE;
     virtual void detach(const AttachContext& = AttachContext()) OVERRIDE;
     virtual const AtomicString& shadowPseudoId() const;
     HTMLInputElement* hostInput() const;
     void setPositionFromPoint(const LayoutPoint&);
 
 private:
     SliderThumbElement(Document*);
-    virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*);
     virtual PassRefPtr<Element> cloneElementWithoutAttributesAndChildren();
     virtual bool isDisabledFormControl() const OVERRIDE;
     virtual bool matchesReadOnlyPseudoClass() const OVERRIDE;
     virtual bool matchesReadWritePseudoClass() const OVERRIDE;
     virtual Node* focusDelegate();
     void startDragging();
     void stopDragging();
 
     bool m_inDragMode;
 };
@@ skipping 37 matching lines @@
 };
 
 // --------------------------------
 
 class SliderContainerElement FINAL : public HTMLDivElement {
 public:
     static PassRefPtr<SliderContainerElement> create(Document*);
 
 private:
     SliderContainerElement(Document*);
-    virtual RenderObject* createRenderer(RenderArena*, RenderStyle*);
+    virtual RenderObject* createRenderer(RenderStyle*);
     virtual const AtomicString& shadowPseudoId() const;
 };
 
 }
 
 #endif