Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/SVGFEImageElement.h

 /*
  * Copyright (C) 2004, 2005, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 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 10 matching lines @@
 #ifndef SVGFEImageElement_h
 #define SVGFEImageElement_h
 
 #include "core/SVGNames.h"
 #include "core/fetch/ImageResource.h"
 #include "core/fetch/ImageResourceClient.h"
 #include "core/fetch/ResourcePtr.h"
 #include "core/svg/SVGAnimatedPreserveAspectRatio.h"
 #include "core/svg/SVGFilterPrimitiveStandardAttributes.h"
 #include "core/svg/SVGURIReference.h"
+#include "platform/heap/Handle.h"
 
 namespace blink {
 
 class SVGFEImageElement final : public SVGFilterPrimitiveStandardAttributes,
                                 public SVGURIReference,
                                 public ImageResourceClient {
     DEFINE_WRAPPERTYPEINFO();
+    WILL_BE_USING_GARBAGE_COLLECTED_MIXIN(SVGFEImageElement);
 public:
     DECLARE_NODE_FACTORY(SVGFEImageElement);
 
     bool currentFrameHasSingleSecurityOrigin() const;
 
     virtual ~SVGFEImageElement();
     SVGAnimatedPreserveAspectRatio* preserveAspectRatio() { return m_preserveAspectRatio.get(); }
 
+    virtual void trace(Visitor*) override;
+
 private:
     explicit SVGFEImageElement(Document&);
 
     bool isSupportedAttribute(const QualifiedName&);
     virtual void parseAttribute(const QualifiedName&, const AtomicString&) override;
     virtual void svgAttributeChanged(const QualifiedName&) override;
     virtual void notifyFinished(Resource*) override;
 
-    virtual PassRefPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
+    virtual PassRefPtrWillBeRawPtr<FilterEffect> build(SVGFilterBuilder*, Filter*) override;
 
     void clearResourceReferences();
     void fetchImageResource();
 
     virtual void buildPendingResource() override;
     virtual InsertionNotificationRequest insertedInto(ContainerNode*) override;
     virtual void removedFrom(ContainerNode*) override;
 
-    RefPtr<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
+    RefPtrWillBeMember<SVGAnimatedPreserveAspectRatio> m_preserveAspectRatio;
 
     ResourcePtr<ImageResource> m_cachedImage;
 };
 
 } // namespace blink
 
 #endif // SVGFEImageElement_h