Oilpan: move SVG property hierarchy to the heap.

Source/platform/graphics/filters/FEMorphology.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) 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.
@@ skipping 17 matching lines @@
 namespace blink {
 
 enum MorphologyOperatorType {
     FEMORPHOLOGY_OPERATOR_UNKNOWN = 0,
     FEMORPHOLOGY_OPERATOR_ERODE = 1,
     FEMORPHOLOGY_OPERATOR_DILATE = 2
 };
 
 class PLATFORM_EXPORT FEMorphology : public FilterEffect {
 public:
-    static PassRefPtr<FEMorphology> create(Filter*, MorphologyOperatorType, float radiusX, float radiusY);
+    static PassRefPtrWillBeRawPtr<FEMorphology> create(Filter*, MorphologyOperatorType, float radiusX, float radiusY);
     MorphologyOperatorType morphologyOperator() const;
     bool setMorphologyOperator(MorphologyOperatorType);
 
     float radiusX() const;
     bool setRadiusX(float);
 
     float radiusY() const;
     bool setRadiusY(float);
 
     virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
 
     virtual FloatRect mapRect(const FloatRect&, bool forward = true) override final;
 
     virtual TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
     FEMorphology(Filter*, MorphologyOperatorType, float radiusX, float radiusY);
 
     MorphologyOperatorType m_type;
     float m_radiusX;
     float m_radiusY;
 };
 
 } // namespace blink
 
 #endif // FEMorphology_h