[Chromecast] Add metrics for logging platform A/V bitrate estimates.

chromecast/media/cma/pipeline/audio_pipeline_impl.h

 // 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.
 
 #ifndef CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_
 #define CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_
 
 #include <vector>
 
 #include "base/macros.h"
@@ skipping 28 matching lines @@
   // AvPipelineImpl implementation:
   void UpdateStatistics() override;
 
  private:
   // AvPipelineImpl implementation:
   void OnUpdateConfig(StreamId id,
                       const ::media::AudioDecoderConfig& audio_config,
                       const ::media::VideoDecoderConfig& video_config) override;
 
   MediaPipelineBackend::AudioDecoder* const audio_decoder_;
+  base::Time last_sample_time_;
+  base::TimeDelta elapsed_time_delta_;

[halliwell, 2016/03/10 17:57:54]

include headers for time classes

[ejason, 2016/03/11 00:24:45]

Done.

+  int audio_bytes_for_bitrate_estimation_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioPipelineImpl);
 };
 
 }  // namespace media
 }  // namespace chromecast
 
 #endif  // CHROMECAST_MEDIA_CMA_BASE_AUDIO_PIPELINE_IMPL_H_