Take NativeImageSkia out behind the woodshed.

Source/platform/graphics/ImageSource.cpp

 /*
  * Copyright (C) 2006 Apple Computer, Inc.  All rights reserved.
  * Copyright (C) 2007 Alp Toker <alp.toker@collabora.co.uk>
  * Copyright (C) 2008, Google 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.
@@ skipping 89 matching lines @@
 {
     return m_decoder ? m_decoder->repetitionCount() : cAnimationNone;
 }
 
 size_t ImageSource::frameCount() const
 {
     int count = m_decoder ? m_decoder->frameCount() : 0;
     return count;
 }
 
-PassRefPtr<NativeImageSkia> ImageSource::createFrameAtIndex(size_t index)
+bool ImageSource::createFrameAtIndex(size_t index, SkBitmap* bitmap)
 {
     if (!m_decoder)
-        return nullptr;
-    return m_decoder->createFrameAtIndex(index);
+        return false;
+    return m_decoder->createFrameAtIndex(index, bitmap);
 }
 
 float ImageSource::frameDurationAtIndex(size_t index) const
 {
     if (!m_decoder)
         return 0;
 
     // Many annoying ads specify a 0 duration to make an image flash as quickly as possible.
     // We follow Firefox's behavior and use a duration of 100 ms for any frames that specify
     // a duration of <= 10 ms. See <rdar://problem/7689300> and <http://webkit.org/b/36082>
@@ skipping 18 matching lines @@
 {
     return m_decoder && m_decoder->frameIsCompleteAtIndex(index);
 }
 
 unsigned ImageSource::frameBytesAtIndex(size_t index) const
 {
     return m_decoder ? m_decoder->frameBytesAtIndex(index) : 0;
 }
 
 } // namespace blink