Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSegListSource.h

 /*
  * Copyright (C) Research In Motion Limited 2010. 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.
  *
  * This library is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  * Library General Public License for more details.
  *
  * You should have received a copy of the GNU Library General Public License
  * along with this library; see the file COPYING.LIB.  If not, write to
  * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
  * Boston, MA 02110-1301, USA.
  */
 
 #ifndef SVGPathSegListSource_h
 #define SVGPathSegListSource_h
 
 #include "core/svg/SVGPathSeg.h"
 #include "core/svg/SVGPathSegList.h"
 #include "core/svg/SVGPathSource.h"
 #include "platform/geometry/FloatPoint.h"
+#include "platform/heap/Handle.h"
 #include "wtf/PassOwnPtr.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class SVGPathSegListSource final : public SVGPathSource {
 public:
     SVGPathSegListSource(SVGPathSegList::ConstIterator, SVGPathSegList::ConstIterator);
 
+    virtual void trace(Visitor*) override;
+
 private:
     virtual bool hasMoreData() const override;
     virtual bool moveToNextToken() override { return true; }
     virtual bool parseSVGSegmentType(SVGPathSegType&) override;
     virtual SVGPathSegType nextCommand(SVGPathSegType) override;
 
     virtual bool parseMoveToSegment(FloatPoint&) override;
     virtual bool parseLineToSegment(FloatPoint&) override;
     virtual bool parseLineToHorizontalSegment(float&) override;
     virtual bool parseLineToVerticalSegment(float&) override;
     virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&) override;
     virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&) override;
     virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&) override;
     virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&) override;
     virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&) override;
 
-    RefPtr<SVGPathSeg> m_segment;
+    RefPtrWillBeMember<SVGPathSeg> m_segment;
     SVGPathSegList::ConstIterator m_itCurrent;
     SVGPathSegList::ConstIterator m_itEnd;
 };
 
 } // namespace blink
 
 #endif // SVGPathSegListSource_h