Wrapped PassRefPtrs in move where passed to RefPtr constructor.

third_party/WebKit/Source/platform/graphics/GradientGeneratedImage.h

 /*
  * Copyright (C) 2008, 2012 Apple Computer, Inc.  All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 38 matching lines @@
  protected:
   void draw(PaintCanvas*,
             const PaintFlags&,
             const FloatRect&,
             const FloatRect&,
             RespectImageOrientationEnum,
             ImageClampingMode) override;
   void drawTile(GraphicsContext&, const FloatRect&) override;
 
   GradientGeneratedImage(PassRefPtr<Gradient> generator, const IntSize& size)
-      : GeneratedImage(size), m_gradient(generator) {}
+      : GeneratedImage(size), m_gradient(std::move(generator)) {}
 
   RefPtr<Gradient> m_gradient;
 };
 
 }  // namespace blink
 
 #endif