Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSource.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 SVGPathSource_h
 #define SVGPathSource_h
 
 #include "core/svg/SVGPathSeg.h"
 
 namespace blink {
 
 class FloatPoint;
 
-class SVGPathSource {
-    WTF_MAKE_NONCOPYABLE(SVGPathSource); WTF_MAKE_FAST_ALLOCATED;
+class SVGPathSource : public NoBaseWillBeGarbageCollectedFinalized<SVGPathSource> {
+    WTF_MAKE_NONCOPYABLE(SVGPathSource); WTF_MAKE_FAST_ALLOCATED_WILL_BE_REMOVED;
 public:
     SVGPathSource() { }
     virtual ~SVGPathSource() { }
 
     virtual bool hasMoreData() const = 0;
     virtual bool moveToNextToken() = 0;
     virtual bool parseSVGSegmentType(SVGPathSegType&) = 0;
     virtual SVGPathSegType nextCommand(SVGPathSegType previousCommand) = 0;
 
     virtual bool parseMoveToSegment(FloatPoint&) = 0;
     virtual bool parseLineToSegment(FloatPoint&) = 0;
     virtual bool parseLineToHorizontalSegment(float&) = 0;
     virtual bool parseLineToVerticalSegment(float&) = 0;
     virtual bool parseCurveToCubicSegment(FloatPoint&, FloatPoint&, FloatPoint&) = 0;
     virtual bool parseCurveToCubicSmoothSegment(FloatPoint&, FloatPoint&) = 0;
     virtual bool parseCurveToQuadraticSegment(FloatPoint&, FloatPoint&) = 0;
     virtual bool parseCurveToQuadraticSmoothSegment(FloatPoint&) = 0;
     virtual bool parseArcToSegment(float&, float&, float&, bool&, bool&, FloatPoint&) = 0;
+
+    virtual void trace(Visitor*) { }
 };
 
 } // namespace blink
 
 #endif // SVGPathSource_h