media: Continue aborting FFMpegDemuxerStream::Read() calls until Seek().

media/base/demuxer.h

Index: media/base/demuxer.h
diff --git a/media/base/demuxer.h b/media/base/demuxer.h
index ae07e60b33ce698965f0d6689d75879c70654088..6fa71a50eb64da1caa666d88d064703d24ae3942 100644
--- a/media/base/demuxer.h
+++ b/media/base/demuxer.h
@@ -89,7 +89,8 @@ class MEDIA_EXPORT Demuxer : public DemuxerStreamProvider {
                           bool enable_text_tracks) = 0;
 
   // Aborts any pending read operations that the demuxer is involved with; any
-  // read aborted will be aborted with a status of kAborted.
+  // read aborted will be aborted with a status of kAborted. Future reads will
+  // also be aborted until Seek() is called.
   virtual void AbortPendingReads() = 0;
 
   // Indicates that a new Seek() call is on its way. Implementations may abort