Oilpan: move SVG property hierarchy to the heap.

Source/core/rendering/svg/RenderSVGResourceLinearGradient.cpp

 /*
  * Copyright (C) 2006 Nikolas Zimmermann <zimmermann@kde.org>
  * 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,
@@ skipping 19 matching lines @@
 
 RenderSVGResourceLinearGradient::RenderSVGResourceLinearGradient(SVGLinearGradientElement* node)
     : RenderSVGResourceGradient(node)
 {
 }
 
 RenderSVGResourceLinearGradient::~RenderSVGResourceLinearGradient()
 {
 }
 
+void RenderSVGResourceLinearGradient::trace(Visitor* visitor)
+{
+    visitor->trace(m_attributes);
+    RenderSVGResourceGradient::trace(visitor);
+}
+
 bool RenderSVGResourceLinearGradient::collectGradientAttributes(SVGGradientElement* gradientElement)
 {
     m_attributes = LinearGradientAttributes();
     return toSVGLinearGradientElement(gradientElement)->collectGradientAttributes(m_attributes);
 }
 
 FloatPoint RenderSVGResourceLinearGradient::startPoint(const LinearGradientAttributes& attributes) const
 {
     return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(), attributes.x1(), attributes.y1());
 }
 
 FloatPoint RenderSVGResourceLinearGradient::endPoint(const LinearGradientAttributes& attributes) const
 {
     return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(), attributes.x2(), attributes.y2());
 }
 
 void RenderSVGResourceLinearGradient::buildGradient(GradientData* gradientData) const
 {
     gradientData->gradient = Gradient::create(startPoint(m_attributes), endPoint(m_attributes));
     gradientData->gradient->setSpreadMethod(platformSpreadMethodFromSVGType(m_attributes.spreadMethod()));
     addStops(gradientData, m_attributes.stops());
 }
 
 }