Update Source/platform/ to assume Oilpan only.

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

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef FEBoxReflect_h
 #define FEBoxReflect_h
 
 #include "platform/PlatformExport.h"
 #include "platform/graphics/GraphicsTypes.h"
 #include "platform/graphics/filters/FilterEffect.h"
 
 namespace blink {
 
 // Used to implement the -webkit-box-reflect property as a filter.
 class PLATFORM_EXPORT FEBoxReflect final : public FilterEffect {
 public:
-    static RawPtr<FEBoxReflect> create(Filter*, ReflectionDirection, float offset);
+    static FEBoxReflect* create(Filter*, ReflectionDirection, float offset);
 
     // FilterEffect implementation
     FloatRect mapRect(const FloatRect&, bool forward = true) const final;
     TextStream& externalRepresentation(TextStream&, int indentation) const final;
     PassRefPtr<SkImageFilter> createImageFilter(SkiaImageFilterBuilder&) final;
 
 private:
     FEBoxReflect(Filter*, ReflectionDirection, float offset);
     ~FEBoxReflect() final;
 
     ReflectionDirection m_reflectionDirection;
     float m_offset;
 };
 
 } // namespace blink
 
 #endif // FEBoxReflect_h