Reverted the code for the non-interactive audible tab notification

media/base/android/audio_decoder_job.h

 // Copyright 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_ANDROID_AUDIO_DECODER_JOB_H_
 #define MEDIA_BASE_ANDROID_AUDIO_DECODER_JOB_H_
 
 #include <jni.h>
 #include <vector>
 
@@ skipping 16 matching lines @@
                   const base::Closure& on_demuxer_config_changed_cb);
   ~AudioDecoderJob() override;
 
   // MediaDecoderJob implementation.
   bool HasStream() const override;
   void Flush() override;
   void SetDemuxerConfigs(const DemuxerConfigs& configs) override;
 
   // Sets the volume of the audio output.
   void SetVolume(double volume);
-  double volume() const { return volume_; }
 
   // Sets the base timestamp for |audio_timestamp_helper_|.
   void SetBaseTimestamp(base::TimeDelta base_timestamp);
 
  private:
   // MediaDecoderJob implementation.
   void ReleaseOutputBuffer(
       int output_buffer_index,
       size_t offset,
       size_t size,
@@ skipping 31 matching lines @@
 
   // Object to calculate the current audio timestamp for A/V sync.
   scoped_ptr<AudioTimestampHelper> audio_timestamp_helper_;
 
   DISALLOW_COPY_AND_ASSIGN(AudioDecoderJob);
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_AUDIO_DECODER_JOB_H_