Fix background blending for some cases where it did not work at all. The fix adds the blendMode par…

Source/core/platform/graphics/Image.h

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006 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
@@ skipping 109 matching lines @@
 
 protected:
     Image(ImageObserver* = 0);
 
     static void fillWithSolidColor(GraphicsContext*, const FloatRect& dstRect, const Color&, CompositeOperator);
     static FloatRect adjustForNegativeSize(const FloatRect&); // A helper method for translating negative width and height values.
 
     virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, BlendMode) = 0;
     virtual void draw(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, CompositeOperator, BlendMode, RespectImageOrientationEnum);
     void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatPoint& srcPoint, const FloatSize& tileSize,
-        CompositeOperator , BlendMode);
+        CompositeOperator, BlendMode);
     void drawTiled(GraphicsContext*, const FloatRect& dstRect, const FloatRect& srcRect, const FloatSize& tileScaleFactor, TileRule hRule, TileRule vRule, CompositeOperator);
 
     // Supporting tiled drawing
     virtual bool mayFillWithSolidColor() { return false; }
     virtual Color solidColor() const { return Color(); }
 
 private:
     RefPtr<SharedBuffer> m_encodedImageData;
     ImageObserver* m_imageObserver;
 };
 
 }
 
 #endif