Oilpan: move SVG property hierarchy to the heap.

Source/core/svg/graphics/filters/SVGFEImage.h

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2010 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2013 Google Inc. 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
@@ skipping 17 matching lines @@
 #include "core/svg/SVGPreserveAspectRatio.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace blink {
 
 class Image;
 class RenderObject;
 
 class FEImage final : public FilterEffect {
 public:
-    static PassRefPtr<FEImage> createWithImage(Filter*, PassRefPtr<Image>, PassRefPtr<SVGPreserveAspectRatio>);
-    static PassRefPtr<FEImage> createWithIRIReference(Filter*, TreeScope&, const String&, PassRefPtr<SVGPreserveAspectRatio>);
+    static PassRefPtrWillBeRawPtr<FEImage> createWithImage(Filter*, PassRefPtr<Image>, PassRefPtrWillBeRawPtr<SVGPreserveAspectRatio>);
+    static PassRefPtrWillBeRawPtr<FEImage> createWithIRIReference(Filter*, TreeScope&, const String&, PassRefPtrWillBeRawPtr<SVGPreserveAspectRatio>);
 
     virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) override;
 
     virtual FilterEffectType filterEffectType() const override { return FilterEffectTypeImage; }
 
     virtual TextStream& externalRepresentation(TextStream&, int indention) const override;
     virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
 
+    virtual void trace(Visitor*) override;
+
 private:
     virtual ~FEImage() { }
-    FEImage(Filter*, PassRefPtr<Image>, PassRefPtr<SVGPreserveAspectRatio>);
-    FEImage(Filter*, TreeScope&, const String&, PassRefPtr<SVGPreserveAspectRatio>);
+    FEImage(Filter*, PassRefPtr<Image>, PassRefPtrWillBeRawPtr<SVGPreserveAspectRatio>);
+    FEImage(Filter*, TreeScope&, const String&, PassRefPtrWillBeRawPtr<SVGPreserveAspectRatio>);
     RenderObject* referencedRenderer() const;
 
     PassRefPtr<SkImageFilter> createImageFilterForRenderer(RenderObject* rendererer, SkiaImageFilterBuilder*);
 
     RefPtr<Image> m_image;
 
     // m_treeScope will never be a dangling reference. See https://bugs.webkit.org/show_bug.cgi?id=99243
+    // FIXME: Oilpan: turn into a (weak) member?
     TreeScope* m_treeScope;
     String m_href;
-    PassRefPtr<SVGPreserveAspectRatio> m_preserveAspectRatio;
+    RefPtrWillBeMember<SVGPreserveAspectRatio> m_preserveAspectRatio;
 };
 
 } // namespace blink
 
 #endif // SVGFEImage_h