Refactor MediaResource to be multi-stream capable

media/remoting/fake_media_resource.h

 // 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.
 
 #ifndef MEDIA_REMOTING_FAKE_MEDIA_RESOURCE_H_
 #define MEDIA_REMOTING_FAKE_MEDIA_RESOURCE_H_
 
 #include <deque>
 
 #include "media/base/audio_decoder_config.h"
@@ skipping 15 matching lines @@
   void FakeRead(const ReadCB& read_cb);
   AudioDecoderConfig audio_decoder_config() override;
   VideoDecoderConfig video_decoder_config() override;
   Type type() const override;
   Liveness liveness() const override;
   void EnableBitstreamConverter() override {}
   bool SupportsConfigChanges() override;
   VideoRotation video_rotation() override;
   bool enabled() const override;
   void set_enabled(bool enabled, base::TimeDelta timestamp) override {}
-  void SetStreamStatusChangeCB(const StreamStatusChangeCB& cb) override {}
 
   void CreateFakeFrame(size_t size, bool key_frame, int pts_ms);
 
  private:
   using BufferQueue = std::deque<scoped_refptr<DecoderBuffer>>;
   BufferQueue buffer_queue_;
   ReadCB pending_read_cb_;
   Type type_;
   AudioDecoderConfig audio_config_;
   VideoDecoderConfig video_config_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeDemuxerStream);
 };
 
 // Audio only demuxer stream provider
 class FakeMediaResource : public MediaResource {
  public:
   FakeMediaResource();
   ~FakeMediaResource() final;
 
   // MediaResource implementation.
-  DemuxerStream* GetStream(DemuxerStream::Type type) override;
+  std::vector<DemuxerStream*> GetStreams() override;
+  void SetStreamStatusChangeCB(const StreamStatusChangeCB& cb) override;
 
  private:
   std::unique_ptr<FakeDemuxerStream> demuxer_stream_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeMediaResource);
 };
 
 }  // namespace remoting
 }  // namespace media
 
 #endif  // MEDIA_REMOTING_FAKE_MEDIA_RESOURCE_H_