Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/graphics/filters/SourceGraphic.h

 /*
  * Copyright (C) 2008 Alex Mathews <possessedpenguinbob@gmail.com>
  * 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.
  *
@@ skipping 13 matching lines @@
 
 #include "platform/geometry/IntRect.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 class SkPicture;
 
 namespace blink {
 
 class PLATFORM_EXPORT SourceGraphic final : public FilterEffect {
 public:
-    static RawPtr<SourceGraphic> create(Filter*);
+    static SourceGraphic* create(Filter*);
     ~SourceGraphic() override;
 
     FloatRect determineAbsolutePaintRect(const FloatRect& requestedRect) override;
 
     FilterEffectType getFilterEffectType() const override { return FilterEffectTypeSourceInput; }
 
     TextStream& externalRepresentation(TextStream&, int indention) const override;
     PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder&) override;
 
     void setPicture(PassRefPtr<const SkPicture>);
     void setSourceRect(const IntRect&);
 
 private:
     explicit SourceGraphic(Filter*);
 
     RefPtr<const SkPicture> m_picture;
     IntRect m_sourceRect;
 };
 
 } //namespace blink
 
 #endif // SourceGraphic_h