Drop dependency on LayoutObject in fetch/

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

 /*
  * Copyright (C) 2006 Samuel Weinig (sam.weinig@gmail.com)
  * Copyright (C) 2004, 2005, 2006, 2008 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
@@ skipping 418 matching lines @@
 {
     if (m_frames.size() <= index)
         return true;
 
     if (m_frames[index].m_haveMetadata)
         return m_frames[index].m_hasAlpha;
 
     return m_source.frameHasAlphaAtIndex(index);
 }
 
-bool BitmapImage::currentFrameKnownToBeOpaque()
+bool BitmapImage::currentFrameKnownToBeOpaque(MetadataMode metadataMode)
 {
+    if (metadataMode == PreCacheMetadata) {
+        // frameHasAlphaAtIndex() conservatively returns false for uncached frames. To increase the
+        // chance of an accurate answer, pre-cache the current frame metadata.
+        frameAtIndex(currentFrame());
+    }
     return !frameHasAlphaAtIndex(currentFrame());
 }
 
 bool BitmapImage::currentFrameIsComplete()
 {
     return frameIsCompleteAtIndex(currentFrame());
 }
 
 bool BitmapImage::currentFrameIsLazyDecoded()
 {
@@ skipping 213 matching lines @@
     destroyDecodedDataIfNecessary();
 
     // We need to draw this frame if we advanced to it while not skipping, or if
     // while trying to skip frames we hit the last frame and thus had to stop.
     if (skippingFrames != advancedAnimation)
         imageObserver()->animationAdvanced(this);
     return advancedAnimation;
 }
 
 } // namespace blink