Prepare SMILTimeContainer for oilpan

Source/core/svg/SVGSVGElement.h

 /*
  * Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007, 2010 Rob Buis <buis@kde.org>
  * Copyright (C) 2014 Google, Inc.
  *
  * 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 96 matching lines @@
     void setupInitialView(const String& fragmentIdentifier, Element* anchorNode);
 
     bool hasIntrinsicWidth() const;
     bool hasIntrinsicHeight() const;
 
     SVGAnimatedLength* x() const { return m_x.get(); }
     SVGAnimatedLength* y() const { return m_y.get(); }
     SVGAnimatedLength* width() const { return m_width.get(); }
     SVGAnimatedLength* height() const { return m_height.get(); }
 
+    virtual void trace(Visitor*) OVERRIDE;
+
 private:
     explicit SVGSVGElement(Document&);
     virtual ~SVGSVGElement();
 
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) OVERRIDE;
     virtual bool isPresentationAttribute(const QualifiedName&) const OVERRIDE;
     virtual void collectStyleForPresentationAttribute(const QualifiedName&, const AtomicString&, MutableStylePropertySet*) OVERRIDE;
 
     virtual bool rendererIsNeeded(const RenderStyle&) OVERRIDE;
     virtual RenderObject* createRenderer(RenderStyle*) OVERRIDE;
@@ skipping 20 matching lines @@
     PassRefPtrWillBeRawPtr<NodeList> collectIntersectionOrEnclosureList(const FloatRect&, SVGElement*, CheckIntersectionOrEnclosure) const;
 
     RefPtr<SVGAnimatedLength> m_x;
     RefPtr<SVGAnimatedLength> m_y;
     RefPtr<SVGAnimatedLength> m_width;
     RefPtr<SVGAnimatedLength> m_height;
 
     virtual AffineTransform localCoordinateSpaceTransform(SVGElement::CTMScope) const OVERRIDE;
 
     bool m_useCurrentView;
-    RefPtr<SMILTimeContainer> m_timeContainer;
+    RefPtrWillBeMember<SMILTimeContainer> m_timeContainer;
     RefPtr<SVGPoint> m_translation;
     RefPtr<SVGViewSpec> m_viewSpec;
 
     friend class SVGCurrentTranslateTearOff;
 };
 
 } // namespace WebCore
 
 #endif