Implement disabling and enabling media tracks

media/base/fake_demuxer_stream.h

 // Copyright (c) 2013 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_BASE_FAKE_DEMUXER_STREAM_H_
 #define MEDIA_BASE_FAKE_DEMUXER_STREAM_H_
 
 #include "base/macros.h"
 #include "base/memory/ref_counted.h"
 #include "media/base/audio_decoder_config.h"
@@ skipping 17 matching lines @@
                     bool is_encrypted);
   ~FakeDemuxerStream() override;
 
   // DemuxerStream implementation.
   void Read(const ReadCB& read_cb) override;
   AudioDecoderConfig audio_decoder_config() override;
   VideoDecoderConfig video_decoder_config() override;
   Type type() const override;
   bool SupportsConfigChanges() override;
   VideoRotation video_rotation() override;
+  bool enabled() const override;
+  void set_enabled(bool enabled, base::TimeDelta timestamp) override;
 
   void Initialize();
 
   int num_buffers_returned() const { return num_buffers_returned_; }
 
   // Upon the next read, holds the read callback until SatisfyRead() or Reset()
   // is called.
   void HoldNextRead();
 
   // Upon the next config change read, holds the read callback until
@@ skipping 71 matching lines @@
 
  private:
   FakeDemuxerStream fake_video_stream_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeDemuxerStreamProvider);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_FAKE_DEMUXER_STREAM_H_