SVGViewSpec wrapper should keep its context SVGSVGElement wrapper alive.

Source/core/svg/SVGViewSpec.h

 /*
  * Copyright (C) 2007 Rob Buis <buis@kde.org>
  *
  * 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 42 matching lines @@
     String preserveAspectRatioString() const;
     String transformString() const;
     String viewTargetString() const { return m_viewTargetString; }
     // override SVGZoomAndPan.setZoomAndPan so can throw exception on write
     void setZoomAndPan(unsigned short value) { } // read only
     void setZoomAndPan(unsigned short value, ExceptionState&);
 
     void trace(Visitor*);
     void clearWeakMembers(Visitor*);
 
+    SVGSVGElement* contextElement() { return m_contextElement.get(); }
+
 private:
     explicit SVGViewSpec(SVGSVGElement*);
 
     template<typename CharType>
     bool parseViewSpecInternal(const CharType* ptr, const CharType* end);
 
     RawPtrWillBeWeakMember<SVGSVGElement> m_contextElement;
     RefPtr<SVGAnimatedTransformList> m_transform;
     String m_viewTargetString;
 };
 
 } // namespace WebCore
 
 #endif