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

third_party/WebKit/Source/platform/image-decoders/gif/GIFImageDecoder.cpp

 /*
  * Copyright (C) 2006 Apple Computer, 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 65 matching lines @@
     // stream. In these cases we should just loop once.
     if (isAllDataReceived() && parseCompleted() && m_reader->imagesCount() == 1)
         m_repetitionCount = cAnimationNone;
     else if (failed() || (m_reader && (!m_reader->imagesCount())))
         m_repetitionCount = cAnimationLoopOnce;
     else if (m_reader && m_reader->loopCount() != cLoopCountNotSeen)
         m_repetitionCount = m_reader->loopCount();
     return m_repetitionCount;
 }
 
-bool GIFImageDecoder::frameIsCompleteAtIndex(size_t index) const
+bool GIFImageDecoder::frameIsFullyReceivedAtIndex(size_t index) const
 {
-    return m_reader && (index < m_reader->imagesCount()) && m_reader->frameContext(index)->isComplete();
+    DCHECK(haveUpdatedFrameCount());
+    return (m_reader && (index < m_reader->imagesCount()) && m_reader->frameContext(index)->isComplete())
+        || ImageDecoder::frameIsFullyReceivedAtIndex(index);
 }
 
 float GIFImageDecoder::frameDurationAtIndex(size_t index) const
 {
     return (m_reader && (index < m_reader->imagesCount()) &&
         m_reader->frameContext(index)->isHeaderDefined()) ?
         m_reader->frameContext(index)->delayTime() : 0;
 }
 
 bool GIFImageDecoder::setFailed()
@@ skipping 190 matching lines @@
     ImageFrame* buffer = &m_frameBufferCache[index];
     const GIFFrameContext* frameContext = m_reader->frameContext(index);
     buffer->setOriginalFrameRect(intersection(frameContext->frameRect(), IntRect(IntPoint(), size())));
     buffer->setDuration(frameContext->delayTime());
     buffer->setDisposalMethod(frameContext->getDisposalMethod());
     buffer->setRequiredPreviousFrameIndex(findRequiredPreviousFrame(index, false));
 }
 
 void GIFImageDecoder::decode(size_t index)
 {
-    parse(GIFFrameCountQuery);
-
+    DCHECK(haveUpdatedFrameCount());
     if (failed())
         return;
 
     Vector<size_t> framesToDecode;
     size_t frameToDecode = index;
     do {
         framesToDecode.append(frameToDecode);
         frameToDecode = m_frameBufferCache[frameToDecode].requiredPreviousFrameIndex();
     } while (frameToDecode != kNotFound && m_frameBufferCache[frameToDecode].getStatus() != ImageFrame::FrameComplete);
 
@@ skipping 57 matching lines @@
 
     // Update our status to be partially complete.
     buffer->setStatus(ImageFrame::FramePartial);
 
     // Reset the alpha pixel tracker for this frame.
     m_currentBufferSawAlpha = false;
     return true;
 }
 
 } // namespace blink