GpuVideoDecoder not to use DemuxerStream after it's stopped.

media/filters/gpu_video_decoder.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef MEDIA_FILTERS_GPU_VIDEO_DECODER_H_
 #define MEDIA_FILTERS_GPU_VIDEO_DECODER_H_
 
 #include <list>
 #include <map>
 #include <utility>
@@ skipping 94 matching lines @@
     kNormal,
     // Avoid the use of "flush" in these enums because the term is overloaded:
     // Filter::Flush() means drop pending data on the floor, but
     // VideoDecodeAccelerator::Flush() means drain pending data (Filter::Flush()
     // actually corresponds to VideoDecodeAccelerator::Reset(), confusingly
     // enough).
     kDrainingDecoder,
     kDecoderDrained,
   };
 
+  void ReadFromDemuxerStream();
+
   // If no demuxer read is in flight and no bitstream buffers are in the
   // decoder, kick some off demuxing/decoding.
   void EnsureDemuxOrDecode();
 
   // Return true if more decode work can be piled on to the VDA.
   bool CanMoreDecodeWorkBeDone();
 
   // Callback to pass to demuxer_stream_->Read() for receiving encoded bits.
   void RequestBufferDecode(DemuxerStream::Status status,
                            const scoped_refptr<DecoderBuffer>& buffer);
@@ skipping 112 matching lines @@
   // Set during ProvidePictureBuffers(), used for checking and implementing
   // HasAvailableOutputFrames().
   int available_pictures_;
 
   DISALLOW_COPY_AND_ASSIGN(GpuVideoDecoder);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_GPU_VIDEO_DECODER_H_