Use SkXfermode::Mode in code related to Image.

Source/platform/graphics/CrossfadeGeneratedImage.h

 /*
  * Copyright (C) 2011 Apple 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 32 matching lines @@
 
     virtual void setContainerSize(const IntSize&) override { }
     virtual bool usesContainerSize() const override { return false; }
     virtual bool hasRelativeWidth() const override { return false; }
     virtual bool hasRelativeHeight() const override { return false; }
 
     virtual IntSize size() const override { return m_crossfadeSize; }
 
 protected:
     void draw(GraphicsContext*, const FloatRect&, const FloatRect&,
-        CompositeOperator, WebBlendMode, RespectImageOrientationEnum) override;
+        SkXfermode::Mode, RespectImageOrientationEnum) override;
     virtual void drawTile(GraphicsContext*, const FloatRect&) final;
 
     CrossfadeGeneratedImage(Image* fromImage, Image* toImage, float percentage, IntSize crossfadeSize, const IntSize&);
 
 private:
     void drawCrossfade(GraphicsContext*);
 
     Image* m_fromImage;
     Image* m_toImage;
 
     float m_percentage;
     IntSize m_crossfadeSize;
 };
 
 } // namespace blink
 
 #endif