Propagate the decoder frame premul info to SkBitmap

third_party/WebKit/Source/platform/image-decoders/ImageFrame.h

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) Research In Motion Limited 2009-2010. 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 181 matching lines @@
     int width() const
     {
         return m_bitmap.width();
     }
 
     int height() const
     {
         return m_bitmap.height();
     }
 
+    SkAlphaType computeAlphaType() const;
+
     SkBitmap m_bitmap;
     SkBitmap::Allocator* m_allocator;
     bool m_hasAlpha;
     // This will always just be the entire buffer except for GIF or WebP
     // frames whose original rect was smaller than the overall image size.
     IntRect m_originalFrameRect;
     Status m_status;
     unsigned m_duration;
     DisposalMethod m_disposalMethod;
     AlphaBlendSource m_alphaBlendSource;
     bool m_premultiplyAlpha;
     // True if the pixels changed, but the bitmap has not yet been notified.
     bool m_pixelsChanged;
 
     // The frame that must be decoded before this frame can be decoded.
     // WTF::kNotFound if this frame doesn't require any previous frame.
     // This is used by ImageDecoder::clearCacheExceptFrame(), and will never
     // be read for image formats that do not have multiple frames.
     size_t m_requiredPreviousFrameIndex;
 };
 
 } // namespace blink
 
 #endif