Revert 190475 "Merge 189983 "Add speaker on/off control on Andro..."

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
===================================================================
--- media/audio/audio_manager_base.h	(revision 191282)
+++ media/audio/audio_manager_base.h	(working copy)
@@ -146,11 +146,7 @@
   // Called by Shutdown().
   void ShutdownOnAudioThread();
 
-#if defined(OS_ANDROID)
   void SetAudioMode(int mode);
-  void RegisterHeadsetReceiver();
-  void UnregisterHeadsetReceiver();
-#endif
 
   // Counts the number of active input streams to find out if something else
   // is currently recording in Chrome.
@@ -186,11 +182,6 @@
   // data to this virtual input stream.
   VirtualAudioInputStream* virtual_audio_input_stream_;
 
-#if defined(OS_ANDROID)
-  // Java AudioManager instance.
-  base::android::ScopedJavaGlobalRef<jobject> j_audio_manager_;
-#endif
-
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };