Add support for cancellation of demuxer reads.

media/base/media_url_demuxer.cc

 // Copyright 2016 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.
 
 #include "media/base/media_url_demuxer.h"
 
 #include "base/bind.h"
 
 namespace media {
 
@@ skipping 33 matching lines @@
 
 void MediaUrlDemuxer::CancelPendingSeek(base::TimeDelta seek_time) {}
 
 void MediaUrlDemuxer::Seek(base::TimeDelta time,
                            const PipelineStatusCB& status_cb) {
   task_runner_->PostTask(FROM_HERE, base::Bind(status_cb, PIPELINE_OK));
 }
 
 void MediaUrlDemuxer::Stop() {}
 
+void MediaUrlDemuxer::AbortPendingReads() {}
+
 base::TimeDelta MediaUrlDemuxer::GetStartTime() const {
   // TODO(tguilbert): Investigate if we need to fetch information from the
   // MediaPlayerRender in order to return a sensible value here.
   return base::TimeDelta();
 }
 base::Time MediaUrlDemuxer::GetTimelineOffset() const {
   return base::Time();
 }
 
 int64_t MediaUrlDemuxer::GetMemoryUsage() const {
   return 0;
 }
 
 void MediaUrlDemuxer::OnEnabledAudioTracksChanged(
     const std::vector<MediaTrack::Id>& track_ids,
     base::TimeDelta currTime) {
   NOTIMPLEMENTED();
 }
 void MediaUrlDemuxer::OnSelectedVideoTrackChanged(
     const std::vector<MediaTrack::Id>& track_ids,
     base::TimeDelta currTime) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace media