Checking if frame is complete and access duration doesn't need a decode

Source/core/platform/graphics/chromium/DeferredImageDecoder.cpp

 /*
  * Copyright (C) 2012 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.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 167 matching lines @@
     // the compositor and this call is ignored.
     if (m_actualDecoder)
         m_actualDecoder->clearFrameBufferCache(clearBeforeFrame);
 }
 
 bool DeferredImageDecoder::frameHasAlphaAtIndex(size_t index) const
 {
     return m_actualDecoder ? m_actualDecoder->frameHasAlphaAtIndex(index) : m_frameGenerator->hasAlpha();
 }
 
+bool DeferredImageDecoder::frameIsCompleteAtIndex(size_t index) const
+{
+    // TODO: Implement this for deferred decoding.
+    return m_actualDecoder && m_actualDecoder->frameIsCompleteAtIndex(index);
+}
+
+float DeferredImageDecoder::frameDurationAtIndex(size_t index) const
+{
+    // TODO: Implement this for deferred decoding.
+    return m_actualDecoder ? m_actualDecoder->frameDurationAtIndex(index) : 0;
+}
+
 unsigned DeferredImageDecoder::frameBytesAtIndex(size_t index) const
 {
     // If frame decoding is deferred then it is not managed by MemoryCache
     // so return 0 here.
     return m_actualDecoder ? m_actualDecoder->frameBytesAtIndex(index) : 0;
 }
 
 ImageOrientation DeferredImageDecoder::orientation() const
 {
     return m_actualDecoder ? m_actualDecoder->orientation() : m_orientation;
@@ skipping 29 matching lines @@
 
     return bitmap;
 }
 
 bool DeferredImageDecoder::hotSpot(IntPoint& hotSpot) const
 {
     return m_actualDecoder ? m_actualDecoder->hotSpot(hotSpot) : false;
 }
 
 } // namespace WebCore