Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGFEMergeNodeElement.cpp

 /*
  * Copyright (C) 2004, 2005 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2006 Rob Buis <buis@kde.org>
  *
  * 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 15 matching lines @@
 
 namespace blink {
 
 inline SVGFEMergeNodeElement::SVGFEMergeNodeElement(Document& document)
     : SVGElement(SVGNames::feMergeNodeTag, document)
     , m_in1(SVGAnimatedString::create(this, SVGNames::inAttr, SVGString::create()))
 {
     addToPropertyMap(m_in1);
 }
 
+void SVGFEMergeNodeElement::trace(Visitor* visitor)
+{
+    visitor->trace(m_in1);
+    SVGElement::trace(visitor);
+}
+
 DEFINE_NODE_FACTORY(SVGFEMergeNodeElement)
 
 void SVGFEMergeNodeElement::parseAttribute(const QualifiedName& name, const AtomicString& value)
 {
     parseAttributeNew(name, value);
 }
 
 void SVGFEMergeNodeElement::svgAttributeChanged(const QualifiedName& attrName)
 {
     if (attrName == SVGNames::inAttr) {
         SVGElement::InvalidationGuard invalidationGuard(this);
         invalidateFilterPrimitiveParent(this);
         return;
     }
 
     SVGElement::svgAttributeChanged(attrName);
 }
 
 }