Refactor MediaResource to be multi-stream capable

media/mojo/services/media_resource_shim.cc

 // Copyright 2014 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/mojo/services/media_resource_shim.h"
 
 #include <utility>
 
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ skipping 12 matching lines @@
 
   for (auto& s : streams) {
     streams_.emplace_back(new MojoDemuxerStreamAdapter(
         std::move(s), base::Bind(&MediaResourceShim::OnStreamReady,
                                  weak_factory_.GetWeakPtr())));
   }
 }
 
 MediaResourceShim::~MediaResourceShim() {}
 
-// This function returns only the first stream of the given |type| for now.
-// TODO(servolk): Make this work with multiple streams.
-DemuxerStream* MediaResourceShim::GetStream(DemuxerStream::Type type) {
+std::vector<DemuxerStream*> MediaResourceShim::GetStreams() {
   DCHECK(demuxer_ready_cb_.is_null());
-  for (auto& stream : streams_) {
-    if (stream->type() == type)
-      return stream.get();
-  }
+  std::vector<DemuxerStream*> result;
+  for (auto& stream : streams_)
+    result.push_back(stream.get());
+  return result;
+}
 
-  return nullptr;
+void MediaResourceShim::SetStreamStatusChangeCB(
+    const StreamStatusChangeCB& cb) {
+  NOTIMPLEMENTED();
 }
 
 void MediaResourceShim::OnStreamReady() {
   if (++streams_ready_ == streams_.size())
     base::ResetAndReturn(&demuxer_ready_cb_).Run();
 }
 
 }  // namespace media