Revert 130180 - Move media/audio files into media namespace

media/audio/mac/audio_manager_mac.h

Index: media/audio/mac/audio_manager_mac.h
===================================================================
--- media/audio/mac/audio_manager_mac.h	(revision 130181)
+++ media/audio/mac/audio_manager_mac.h	(working copy)
@@ -9,8 +9,6 @@
 #include "base/compiler_specific.h"
 #include "media/audio/audio_manager_base.h"
 
-namespace media {
-
 // Mac OS X implementation of the AudioManager singleton. This class is internal
 // to the audio output and only internal users can call methods not exposed by
 // the AudioManager class.
@@ -43,6 +41,4 @@
   DISALLOW_COPY_AND_ASSIGN(AudioManagerMac);
 };
 
-}  // namespace media
-
 #endif  // MEDIA_AUDIO_MAC_AUDIO_MANAGER_MAC_H_