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

third_party/WebKit/Source/platform/image-decoders/ico/ICOImageDecoder.cpp

 /*
  * Copyright (c) 2008, 2009, 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:
  *
  *     * Redistributions of source code must retain the above copyright
  * notice, this list of conditions and the following disclaimer.
  *     * Redistributions in binary form must reproduce the above
@@ skipping 129 matching lines @@
     // may have called SharedBuffer::mergeSegmentsIntoBuffer().
     m_fastReader.clearCache();
 
     // If we couldn't decode the image but we've received all the data, decoding
     // has failed.
     if ((!decodeDirectory() || (!onlySize && !decodeAtIndex(index))) && isAllDataReceived()) {
         setFailed();
     // If we're done decoding this frame, we don't need the BMPImageReader or
     // PNGImageDecoder anymore.  (If we failed, these have already been
     // cleared.)
-    } else if ((m_frameBufferCache.size() > index) && (m_frameBufferCache[index].getStatus() == ImageFrame::FrameComplete)) {
+    } else if (frameIsCompleteAtIndex(index)) {
         m_bmpReaders[index].clear();
         m_pngDecoders[index].clear();
     }
 }
 
 bool ICOImageDecoder::decodeDirectory()
 {
     // Read and process directory.
     if ((m_decodedOffset < sizeOfDirectory) && !processDirectory())
         return false;
@@ skipping 137 matching lines @@
     ASSERT_WITH_SECURITY_IMPLICATION(index < m_dirEntries.size());
     const uint32_t imageOffset = m_dirEntries[index].m_imageOffset;
     if ((imageOffset > m_data->size()) || ((m_data->size() - imageOffset) < 4))
         return Unknown;
     char buffer[4];
     const char* data = m_fastReader.getConsecutiveData(imageOffset, 4, buffer);
     return strncmp(data, "\x89PNG", 4) ? BMP : PNG;
 }
 
 } // namespace blink