Oilpan: move SVG property hierarchy to the heap.

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

 /*
  * Copyright (C) 2009 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
  * 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 16 matching lines @@
 #include "platform/graphics/filters/FilterEffect.h"
 #include "platform/transforms/AffineTransform.h"
 #include "wtf/PassRefPtr.h"
 #include "wtf/RefCounted.h"
 #include "wtf/RefPtr.h"
 
 namespace blink {
 
 class SVGFilter final : public Filter {
 public:
-    static PassRefPtr<SVGFilter> create(const IntRect&, const FloatRect&, const FloatRect&, bool);
+    static PassRefPtrWillBeRawPtr<SVGFilter> create(const IntRect&, const FloatRect&, const FloatRect&, bool);
 
     virtual float applyHorizontalScale(float value) const override;
     virtual float applyVerticalScale(float value) const override;
     virtual FloatPoint3D resolve3dPoint(const FloatPoint3D&) const override;
 
     virtual IntRect sourceImageRect() const override { return m_absoluteSourceDrawingRegion; }
     FloatRect targetBoundingBox() const { return m_targetBoundingBox; }
 
 private:
     SVGFilter(const IntRect& absoluteSourceDrawingRegion, const FloatRect& targetBoundingBox, const FloatRect& filterRegion, bool effectBBoxMode);
 
     IntRect m_absoluteSourceDrawingRegion;
     FloatRect m_targetBoundingBox;
     bool m_effectBBoxMode;
 };
 
 } // namespace blink
 
 #endif // SVGFilter_h