Reverted the code for the non-interactive audible tab notification

media/base/android/media_player_manager.h

 // Copyright (c) 2012 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_MEDIA_PLAYER_MANAGER_H_
 #define MEDIA_BASE_ANDROID_MEDIA_PLAYER_MANAGER_H_
 
 #include "base/basictypes.h"
 #include "base/time/time.h"
 #include "media/base/android/demuxer_stream_player_params.h"
@@ skipping 45 matching lines @@
   virtual void OnSeekComplete(
       int player_id,
       const base::TimeDelta& current_time) = 0;
 
   // Called when error happens. Args: player ID, error type.
   virtual void OnError(int player_id, int error) = 0;
 
   // Called when video size has changed. Args: player ID, width, height.
   virtual void OnVideoSizeChanged(int player_id, int width, int height) = 0;
 
-  // Called when the player thinks it stopped or started making sound.
-  virtual void OnAudibleStateChanged(int player_id, bool is_audible_now) = 0;
-
   // Called when the player pauses as a new key is required to decrypt
   // encrypted content.
   virtual void OnWaitingForDecryptionKey(int player_id) = 0;
 
   // Returns the player that's in the fullscreen mode currently.
   virtual MediaPlayerAndroid* GetFullscreenPlayer() = 0;
 
   // Returns the player with the specified id.
   virtual MediaPlayerAndroid* GetPlayer(int player_id) = 0;
 
   // Called by the player to request to play. The manager should use this
   // opportunity to check if the current context is appropriate for a media to
   // play.
   // Returns whether the request was granted.
   virtual bool RequestPlay(int player_id) = 0;
 };
 
 }  // namespace media
 
 #endif  // MEDIA_BASE_ANDROID_MEDIA_PLAYER_MANAGER_H_