Update Source/platform/ to assume Oilpan only.

third_party/WebKit/Source/platform/graphics/filters/FEConvolveMatrix.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) 2010 Zoltan Herczeg <zherczeg@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
@@ skipping 23 matching lines @@
 
 enum EdgeModeType {
     EDGEMODE_UNKNOWN   = 0,
     EDGEMODE_DUPLICATE = 1,
     EDGEMODE_WRAP      = 2,
     EDGEMODE_NONE      = 3
 };
 
 class PLATFORM_EXPORT FEConvolveMatrix final : public FilterEffect {
 public:
-    static RawPtr<FEConvolveMatrix> create(Filter*, const IntSize&,
+    static FEConvolveMatrix* create(Filter*, const IntSize&,
         float, float, const IntPoint&, EdgeModeType, bool, const Vector<float>&);
 
     bool setDivisor(float);
     bool setBias(float);
     bool setTargetOffset(const IntPoint&);
     bool setEdgeMode(EdgeModeType);
     bool setPreserveAlpha(bool);
 
     FloatRect mapPaintRect(const FloatRect&, bool forward = true) const final;
 
@@ skipping 12 matching lines @@
     float m_bias;
     IntPoint m_targetOffset;
     EdgeModeType m_edgeMode;
     bool m_preserveAlpha;
     Vector<float> m_kernelMatrix;
 };
 
 } // namespace blink
 
 #endif // FEConvolveMatrix_h