Fix up missing timestamps in FFmpegDemuxer.

media/filters/ffmpeg_demuxer.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.
 
 // Implements the Demuxer interface using FFmpeg's libavformat.  At this time
 // will support demuxing any audio/video format thrown at it.  The streams
 // output mime types audio/x-ffmpeg and video/x-ffmpeg and include an integer
 // key FFmpegCodecID which contains the CodecID enumeration value.  The CodecIDs
 // can be used to create and initialize the corresponding FFmpeg decoder.
 //
@@ skipping 179 matching lines @@
   DecoderBufferQueue buffer_queue_;
   ReadCB read_cb_;
   StreamStatusChangeCB stream_status_change_cb_;
 
 #if defined(USE_PROPRIETARY_CODECS)
   std::unique_ptr<FFmpegBitstreamConverter> bitstream_converter_;
 #endif
 
   std::string encryption_key_id_;
   bool fixup_negative_timestamps_;
+  bool warned_about_missing_timestamps_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxerStream);
 };
 
 class MEDIA_EXPORT FFmpegDemuxer : public Demuxer {
  public:
   FFmpegDemuxer(const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
                 DataSource* data_source,
                 const EncryptedMediaInitDataCB& encrypted_media_init_data_cb,
                 const MediaTracksUpdatedCB& media_tracks_updated_cb,
@@ skipping 155 matching lines @@
   base::WeakPtr<FFmpegDemuxer> weak_this_;
   base::WeakPtrFactory<FFmpegDemuxer> cancel_pending_seek_factory_;
   base::WeakPtrFactory<FFmpegDemuxer> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(FFmpegDemuxer);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_FILTERS_FFMPEG_DEMUXER_H_