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

Source/core/platform/graphics/GeneratorGeneratedImage.cpp

 /*
  * Copyright (C) 2008, 2009, 2010, 2012 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 121 matching lines @@
 
         // Fill with the generated image.
         m_cachedImageBuffer->context()->setFillGradient(m_gradient);
         m_cachedImageBuffer->context()->fillRect(FloatRect(FloatPoint(), adjustedSize));
 
         m_cachedGeneratorHash = generatorHash;
         m_cachedAdjustedSize = adjustedSize;
     }
 
     // Tile the image buffer into the context.
-    m_cachedImageBuffer->drawPattern(destContext, adjustedSrcRect, scaleWithoutCTM, phase, compositeOp, destRect);
+    m_cachedImageBuffer->drawPattern(destContext, adjustedSrcRect, scaleWithoutCTM, phase, compositeOp, destRect, blendMode);
     m_cacheTimer.restart();
 }
 
 void GeneratorGeneratedImage::invalidateCacheTimerFired(DeferrableOneShotTimer<GeneratorGeneratedImage>*)
 {
     m_cachedImageBuffer.clear();
     m_cachedAdjustedSize = IntSize();
 }
 
 }