Refactor MediaResource to be multi-stream capable

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"
 #include "base/single_thread_task_runner.h"
 
 namespace media {
 
 MediaUrlDemuxer::MediaUrlDemuxer(
     const scoped_refptr<base::SingleThreadTaskRunner>& task_runner,
     const GURL& media_url,
     const GURL& first_party_for_cookies)
     : params_{media_url, first_party_for_cookies}, task_runner_(task_runner) {}
 
 MediaUrlDemuxer::~MediaUrlDemuxer() {}
 
 // Should never be called since MediaResource::Type is URL.
-DemuxerStream* MediaUrlDemuxer::GetStream(DemuxerStream::Type type) {
+std::vector<DemuxerStream*> MediaUrlDemuxer::GetStreams() {
   NOTREACHED();
-  return nullptr;
+  return std::vector<DemuxerStream*>();
+}
+
+// Should never be called since MediaResource::Type is URL.
+void MediaUrlDemuxer::SetStreamStatusChangeCB(const StreamStatusChangeCB& cb) {
+  NOTREACHED();
 }
 
 MediaUrlParams MediaUrlDemuxer::GetMediaUrlParams() const {
   return params_;
 }
 
 MediaResource::Type MediaUrlDemuxer::GetType() const {
   return MediaResource::Type::URL;
 }
 
@@ skipping 39 matching lines @@
     base::TimeDelta currTime) {
   NOTIMPLEMENTED();
 }
 void MediaUrlDemuxer::OnSelectedVideoTrackChanged(
     const std::vector<MediaTrack::Id>& track_ids,
     base::TimeDelta currTime) {
   NOTIMPLEMENTED();
 }
 
 }  // namespace media