Determine the audible state in MediaSourcePlayer

media/base/android/audio_decoder_job.h

Index: media/base/android/audio_decoder_job.h
diff --git a/media/base/android/audio_decoder_job.h b/media/base/android/audio_decoder_job.h
index f218f3ed1b46918a43c3217836e1d5edc2e00f53..0a7523fa7786f5715225cb43db98538ccc194436 100644
--- a/media/base/android/audio_decoder_job.h
+++ b/media/base/android/audio_decoder_job.h
@@ -34,6 +34,7 @@ class AudioDecoderJob : public MediaDecoderJob {
 
   // 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);