Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGGradientElement.cpp

 /*
  * Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006, 2007 Rob Buis <buis@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.
  *
@@ skipping 39 matching lines @@
     , SVGURIReference(this)
     , m_gradientTransform(SVGAnimatedTransformList::create(this, SVGNames::gradientTransformAttr, SVGTransformList::create()))
     , m_spreadMethod(SVGAnimatedEnumeration<SVGSpreadMethodType>::create(this, SVGNames::spreadMethodAttr, SVGSpreadMethodPad))
     , m_gradientUnits(SVGAnimatedEnumeration<SVGUnitTypes::SVGUnitType>::create(this, SVGNames::gradientUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX))
 {
     addToPropertyMap(m_gradientTransform);
     addToPropertyMap(m_spreadMethod);
     addToPropertyMap(m_gradientUnits);
 }
 
+void SVGGradientElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_gradientTransform);
+    visitor->trace(m_spreadMethod);
+    visitor->trace(m_gradientUnits);
+    SVGElement::trace(visitor);
+    SVGURIReference::trace(visitor);
+}
+
 bool SVGGradientElement::isSupportedAttribute(const QualifiedName& attrName)
 {
     DEFINE_STATIC_LOCAL(HashSet<QualifiedName>, supportedAttributes, ());
     if (supportedAttributes.isEmpty()) {
         SVGURIReference::addSupportedAttributes(supportedAttributes);
         supportedAttributes.add(SVGNames::gradientUnitsAttr);
         supportedAttributes.add(SVGNames::gradientTransformAttr);
         supportedAttributes.add(SVGNames::spreadMethodAttr);
     }
     return supportedAttributes.contains<SVGAttributeHashTranslator>(attrName);
@@ skipping 40 matching lines @@
         offset = std::min(std::max(previousOffset, offset), 1.0f);
         previousOffset = offset;
 
         stops.append(Gradient::ColorStop(offset, stop->stopColorIncludingOpacity()));
     }
 
     return stops;
 }
 
 }