Oilpan: move SVG property hierarchy to the heap.

Source/platform/graphics/filters/FEGaussianBlur.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 11 matching lines @@
 
 #ifndef FEGaussianBlur_h
 #define FEGaussianBlur_h
 
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT FEGaussianBlur : public FilterEffect {
 public:
-    static PassRefPtr<FEGaussianBlur> create(Filter*, float, float);
+    static PassRefPtrWillBeRawPtr<FEGaussianBlur> create(Filter*, float, float);
 
     float stdDeviationX() const;
     void setStdDeviationX(float);
 
     float stdDeviationY() const;
     void setStdDeviationY(float);
 
     virtual FloatRect mapRect(const FloatRect&, bool forward = true) override final;
     virtual FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) override;
     static IntSize calculateKernelSize(Filter*, const FloatPoint& std);
     static IntSize calculateUnscaledKernelSize(const FloatPoint& std);
 
     virtual TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
     FEGaussianBlur(Filter*, float, float);
 
     virtual PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder*) override;
 
     float m_stdX;
     float m_stdY;
 };
 
 } // namespace blink
 
 #endif // FEGaussianBlur_h