Add a origin clean flag in ImageBitmap class

third_party/WebKit/Source/platform/graphics/ImageBuffer.cpp

 /*
  * Copyright (c) 2008, Google Inc. All rights reserved.
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) 2010 Torch Mobile (Beijing) Co. Ltd. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions are
  * met:
  *
  *     * Redistributions of source code must retain the above copyright
@@ skipping 142 matching lines @@
     if (!isSurfaceValid())
         return nullptr;
     return m_surface->newImageSnapshot(hint);
 }
 
 PassRefPtr<Image> ImageBuffer::newImageSnapshot(AccelerationHint hint) const
 {
     RefPtr<SkImage> snapshot = newSkImageSnapshot(hint);
     if (!snapshot)
         return nullptr;
-    return StaticBitmapImage::create(snapshot);
+    return StaticBitmapImage::create(snapshot, true);

[Justin Novosad, 2016/01/07 17:12:01]

Really? An image buffer may be associated with a canvas that is not origin
clean.

[xidachen, 2016/01/08 18:07:55]

Acknowledged.

 }
 
 void ImageBuffer::didDraw(const FloatRect& rect) const
 {
     if (m_snapshotState == DidAcquireSnapshot)
         m_snapshotState = DrawnToAfterSnapshot;
     m_surface->didDraw(rect);
 }
 
 WebLayer* ImageBuffer::platformLayer() const
@@ skipping 223 matching lines @@
     ASSERT(MIMETypeRegistry::isSupportedImageMIMETypeForEncoding(mimeType));
 
     Vector<unsigned char> result;
     if (!encodeImage(mimeType, quality, &result))
         return "data:,";
 
     return "data:" + mimeType + ";base64," + base64Encode(result);
 }
 
 } // namespace blink