Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGScriptElement.h

 /*
  * Copyright (C) 2004, 2005, 2008 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005, 2007 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,
  * 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 SVGScriptElement_h
 #define SVGScriptElement_h
 
 #include "core/SVGNames.h"
 #include "core/dom/ScriptLoaderClient.h"
 #include "core/svg/SVGAnimatedBoolean.h"
 #include "core/svg/SVGAnimatedString.h"
 #include "core/svg/SVGElement.h"
 #include "core/svg/SVGURIReference.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class ScriptLoader;
 
 class SVGScriptElement final
     : public SVGElement
     , public SVGURIReference
     , public ScriptLoaderClient {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGScriptElement);
 public:
     static PassRefPtrWillBeRawPtr<SVGScriptElement> create(Document&, bool wasInsertedByParser);
 
     ScriptLoader* loader() const { return m_loader.get(); }
 
 #if ENABLE(ASSERT)
     virtual bool isAnimatableAttribute(const QualifiedName&) const override;
 #endif
 
     virtual void trace(Visitor*) override;
@@ skipping 32 matching lines @@
 
     virtual Timer<SVGElement>* svgLoadEventTimer() override { return &m_svgLoadEventTimer; }
 
     Timer<SVGElement> m_svgLoadEventTimer;
     OwnPtrWillBeMember<ScriptLoader> m_loader;
 };
 
 } // namespace blink
 
 #endif // SVGScriptElement_h