Fix ImageDecoder::frameIsCompleteAtIndex - fully received instead of decoded.

third_party/WebKit/Source/platform/graphics/test/MockImageDecoder.h

 /*
  * 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
@@ skipping 74 matching lines @@
     String filenameExtension() const override
     {
         return "mock";
     }
 
     int repetitionCount() const override
     {
         return m_client->repetitionCount();
     }
 
-    bool frameIsCompleteAtIndex(size_t) const override
+    bool frameIsFullyReceivedAtIndex(size_t index) const override
     {
-        return m_client->status() == ImageFrame::FrameComplete;
+        // All but the last frame are fully received.
+        // For the last frame use base class implementation.
+        if (index < m_frameBufferCache.size() - 1)
+            return true;
+        return ImageDecoder::frameIsFullyReceivedAtIndex(index);
     }
 
     float frameDurationAtIndex(size_t) const override
     {
         return m_client->frameDuration();
     }
 
     size_t clearCacheExceptFrame(size_t clearExceptFrame) override
     {
         m_client->clearCacheExceptFrameRequested(clearExceptFrame);
@@ skipping 53 matching lines @@
     {
     }
 
     MockImageDecoderClient* m_client;
     IntSize m_decodedSize;
 };
 
 } // namespace blink
 
 #endif // MockImageDecoder_h