Move media/audio files into media namespace

media/audio/android/audio_manager_android.h

Index: media/audio/android/audio_manager_android.h
diff --git a/media/audio/android/audio_manager_android.h b/media/audio/android/audio_manager_android.h
index 5d42270c2dc8ae631e62089a2c0d79a3b9645ee7..90e319ad5e23f09e830a4986f5cbccd3e4a62744 100644
--- a/media/audio/android/audio_manager_android.h
+++ b/media/audio/android/audio_manager_android.h
@@ -7,6 +7,8 @@
 
 #include "media/audio/audio_manager_base.h"
 
+namespace media {
+
 // Android implemention of AudioManager.
 class AudioManagerAndroid : public AudioManagerBase {
  public:
@@ -35,4 +37,6 @@ class AudioManagerAndroid : public AudioManagerBase {
   DISALLOW_COPY_AND_ASSIGN(AudioManagerAndroid);
 };
 
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_ANDROID_AUDIO_MANAGER_ANDROID_H_