Move media/audio files into media namespace (relanding)

media/audio/android/opensles_output.cc

Index: media/audio/android/opensles_output.cc
diff --git a/media/audio/android/opensles_output.cc b/media/audio/android/opensles_output.cc
index b08c411b70a6436d598531aa100b889186577d44..34641353df17e45cd1a1db8aa18a1096f5e1a5c4 100644
--- a/media/audio/android/opensles_output.cc
+++ b/media/audio/android/opensles_output.cc
@@ -8,6 +8,8 @@
 #include "media/audio/audio_util.h"
 #include "media/audio/android/audio_manager_android.h"
 
+namespace media {
+
 OpenSLESOutputStream::OpenSLESOutputStream(AudioManagerAndroid* manager,
                                            const AudioParameters& params)
     : audio_manager_(manager),
@@ -295,3 +297,5 @@ void OpenSLESOutputStream::HandleError(SLresult error) {
   if (callback_)
     callback_->OnError(this, error);
 }
+
+}  // namespace media