Revert 130180 - Move media/audio files into media namespace

media/audio/audio_manager_base.h

Index: media/audio/audio_manager_base.h
===================================================================
--- media/audio/audio_manager_base.h	(revision 130181)
+++ media/audio/audio_manager_base.h	(working copy)
@@ -13,14 +13,12 @@
 #include "base/synchronization/lock.h"
 #include "media/audio/audio_manager.h"
 
+class AudioOutputDispatcher;
+
 namespace base {
 class Thread;
 }
 
-namespace media {
-
-class AudioOutputDispatcher;
-
 // AudioManagerBase provides AudioManager functions common for all platforms.
 class MEDIA_EXPORT AudioManagerBase : public AudioManager {
  public:
@@ -126,6 +124,4 @@
   DISALLOW_COPY_AND_ASSIGN(AudioManagerBase);
 };
 
-}  // namespace media
-
 #endif  // MEDIA_AUDIO_AUDIO_MANAGER_BASE_H_