Move media/audio files into media namespace

media/audio/mac/audio_low_latency_input_mac.h

Index: media/audio/mac/audio_low_latency_input_mac.h
diff --git a/media/audio/mac/audio_low_latency_input_mac.h b/media/audio/mac/audio_low_latency_input_mac.h
index d1e507f0240145f9993fbb91233dd8c125e25b59..d35e4399eb626273bc96b21aeebabd21d9a98752 100644
--- a/media/audio/mac/audio_low_latency_input_mac.h
+++ b/media/audio/mac/audio_low_latency_input_mac.h
@@ -46,6 +46,8 @@
 #include "media/audio/audio_input_stream_impl.h"
 #include "media/audio/audio_parameters.h"
 
+namespace media {
+
 class AudioManagerMac;
 
 class AUAudioInputStream : public AudioInputStreamImpl {
@@ -146,4 +148,6 @@ class AUAudioInputStream : public AudioInputStreamImpl {
   DISALLOW_COPY_AND_ASSIGN(AUAudioInputStream);
 };
 
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_MAC_AUDIO_LOW_LATENCY_INPUT_MAC_H_