Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGPathSegListBuilder.cpp

 /*
  * 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
@@ skipping 32 matching lines @@
 #include "core/svg/SVGPathSegLinetoHorizontalRel.h"
 #include "core/svg/SVGPathSegLinetoRel.h"
 #include "core/svg/SVGPathSegLinetoVerticalAbs.h"
 #include "core/svg/SVGPathSegLinetoVerticalRel.h"
 #include "core/svg/SVGPathSegMovetoAbs.h"
 #include "core/svg/SVGPathSegMovetoRel.h"
 
 namespace blink {
 
 SVGPathSegListBuilder::SVGPathSegListBuilder()
-    : m_pathElement(0)
+    : m_pathElement(nullptr)
     , m_pathSegList(nullptr)
 {
 }
 
+void SVGPathSegListBuilder::trace(Visitor* visitor)
+{
+    visitor->trace(m_pathElement);
+    visitor->trace(m_pathSegList);
+    SVGPathConsumer::trace(visitor);
+}
+
 void SVGPathSegListBuilder::moveTo(const FloatPoint& targetPoint, bool, PathCoordinateMode mode)
 {
     ASSERT(m_pathElement);
     ASSERT(m_pathSegList);
     if (mode == AbsoluteCoordinates)
         m_pathSegList->appendWithoutByteStreamSync(SVGPathSegMovetoAbs::create(m_pathElement, targetPoint.x(), targetPoint.y()));
     else
         m_pathSegList->appendWithoutByteStreamSync(SVGPathSegMovetoRel::create(m_pathElement, targetPoint.x(), targetPoint.y()));
 }
 
@@ skipping 78 matching lines @@
 }
 
 void SVGPathSegListBuilder::closePath()
 {
     ASSERT(m_pathElement);
     ASSERT(m_pathSegList);
     m_pathSegList->appendWithoutByteStreamSync(SVGPathSegClosePath::create(m_pathElement));
 }
 
 }