Oilpan: move RenderObjects off heap.

Source/core/rendering/RenderPart.h

 /*
  * Copyright (C) 1999 Lars Knoll (knoll@kde.org)
  *           (C) 2000 Simon Hausmann <hausmann@kde.org>
  * Copyright (C) 2006, 2009 Apple Inc. All rights reserved.
  *
  * This library is free software; you can redistribute it and/or
  * modify it under the terms of the GNU Library General Public
  * License as published by the Free Software Foundation; either
  * version 2 of the License, or (at your option) any later version.
  *
@@ skipping 22 matching lines @@
 public:
     explicit RenderPart(Element*);
     virtual ~RenderPart();
 
     bool requiresAcceleratedCompositing() const;
 
     virtual bool needsPreferredWidthsRecalculation() const override final;
 
     virtual bool nodeAtPoint(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction) override;
 
-#if !ENABLE(OILPAN)
     void ref() { ++m_refCount; }
     void deref();
-#endif
 
     Widget* widget() const;
 
     void updateOnWidgetChange();
     void updateWidgetPosition();
     void widgetPositionsUpdated();
     bool updateWidgetGeometry();
 
     virtual bool isRenderPart() const override final { return true; }
     virtual void paintContents(const PaintInfo&, const LayoutPoint&);
@@ skipping 11 matching lines @@
 
     virtual CompositingReasons additionalCompositingReasons() const override;
 
     virtual void willBeDestroyed() override final;
     virtual void destroy() override final;
 
     bool setWidgetGeometry(const LayoutRect&);
 
     bool nodeAtPointOverWidget(const HitTestRequest&, HitTestResult&, const HitTestLocation& locationInContainer, const LayoutPoint& accumulatedOffset, HitTestAction);
 
-#if !ENABLE(OILPAN)
     int m_refCount;
-#endif
 };
 
 DEFINE_RENDER_OBJECT_TYPE_CASTS(RenderPart, isRenderPart());
 
 } // namespace blink
 
 #endif // RenderPart_h