Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/graphics/filters/FEBlend.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 12 matching lines @@
 #ifndef FEBlend_h
 #define FEBlend_h
 
 #include "platform/graphics/filters/FilterEffect.h"
 #include "public/platform/WebBlendMode.h"
 
 namespace blink {
 
 class PLATFORM_EXPORT FEBlend final : public FilterEffect {
 public:
-    static RawPtr<FEBlend> create(Filter*, WebBlendMode);
+    static FEBlend* create(Filter*, WebBlendMode);
 
     WebBlendMode blendMode() const;
     bool setBlendMode(WebBlendMode);
 
     TextStream& externalRepresentation(TextStream&, int indention) const override;
 
 private:
     FEBlend(Filter*, WebBlendMode);
 
     PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder&) override;
 
     WebBlendMode m_mode;
 };
 
 } // namespace blink
 
 #endif // FEBlend_h