Move media/audio files into media namespace

media/audio/fake_audio_output_stream.h

Index: media/audio/fake_audio_output_stream.h
diff --git a/media/audio/fake_audio_output_stream.h b/media/audio/fake_audio_output_stream.h
index 19ed57680c200c38c5edbd37fec4ccc1e99ba3ad..d4ab11ae625c9a97552d28de8f1579afa08af655 100644
--- a/media/audio/fake_audio_output_stream.h
+++ b/media/audio/fake_audio_output_stream.h
@@ -15,6 +15,8 @@
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
+namespace media {
+
 class AudioManagerBase;
 
 class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream {
@@ -52,4 +54,6 @@ class MEDIA_EXPORT FakeAudioOutputStream : public AudioOutputStream {
   DISALLOW_COPY_AND_ASSIGN(FakeAudioOutputStream);
 };
 
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_FAKE_AUDIO_OUTPUT_STREAM_H_