Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSegListBuilder.h

 /*
  * Copyright (C) 2002, 2003 The Karbon Developers
  * Copyright (C) 2006 Alexander Kellett <lypanov@kde.org>
  * Copyright (C) 2006, 2007 Rob Buis <buis@kde.org>
  * Copyright (C) 2007, 2009 Apple Inc. All rights reserved.
  * 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 SVGPathSegListBuilder_h
 #define SVGPathSegListBuilder_h
 
 #include "core/svg/SVGPathConsumer.h"
 #include "core/svg/SVGPathSegList.h"
 #include "platform/geometry/FloatPoint.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class SVGPathElement;
 
 class SVGPathSegListBuilder final : public SVGPathConsumer {
 public:
     SVGPathSegListBuilder();
 
     void setCurrentSVGPathElement(SVGPathElement* pathElement) { m_pathElement = pathElement; }
-    void setCurrentSVGPathSegList(PassRefPtr<SVGPathSegList> pathSegList) { m_pathSegList = pathSegList; }
+    void setCurrentSVGPathSegList(PassRefPtrWillBeRawPtr<SVGPathSegList> pathSegList) { m_pathSegList = pathSegList; }
+
+    virtual void trace(Visitor*) override;
 
 private:
     virtual void incrementPathSegmentCount() override { }
     virtual bool continueConsuming() override { return true; }
     virtual void cleanup() override
     {
-        m_pathElement = 0;
+        m_pathElement = nullptr;
         m_pathSegList = nullptr;
     }
 
     // Used in UnalteredParsing/NormalizedParsing modes.
     virtual void moveTo(const FloatPoint&, bool closed, PathCoordinateMode) override;
     virtual void lineTo(const FloatPoint&, PathCoordinateMode) override;
     virtual void curveToCubic(const FloatPoint&, const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
     virtual void closePath() override;
 
     // Only used in UnalteredParsing mode.
     virtual void lineToHorizontal(float, PathCoordinateMode) override;
     virtual void lineToVertical(float, PathCoordinateMode) override;
     virtual void curveToCubicSmooth(const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
     virtual void curveToQuadratic(const FloatPoint&, const FloatPoint&, PathCoordinateMode) override;
     virtual void curveToQuadraticSmooth(const FloatPoint&, PathCoordinateMode) override;
     virtual void arcTo(float, float, float, bool largeArcFlag, bool sweepFlag, const FloatPoint&, PathCoordinateMode) override;
 
-    SVGPathElement* m_pathElement;
-    RefPtr<SVGPathSegList> m_pathSegList;
+    RawPtrWillBeMember<SVGPathElement> m_pathElement;
+    RefPtrWillBeMember<SVGPathSegList> m_pathSegList;
 };
 
 } // namespace blink
 
 #endif // SVGPathSegListBuilder_h