Move media/audio files into media namespace

media/audio/mac/audio_input_mac.h

Index: media/audio/mac/audio_input_mac.h
diff --git a/media/audio/mac/audio_input_mac.h b/media/audio/mac/audio_input_mac.h
index 1347871ac3af36e5375c36bed65285f036b0d0fe..d290bcb4af5873ba7558f77b6e55e6f4c02f7e6e 100644
--- a/media/audio/mac/audio_input_mac.h
+++ b/media/audio/mac/audio_input_mac.h
@@ -12,6 +12,8 @@
 #include "media/audio/audio_io.h"
 #include "media/audio/audio_parameters.h"
 
+namespace media {
+
 class AudioManagerMac;
 
 // Implementation of AudioInputStream for Mac OS X using the audio queue service
@@ -78,4 +80,6 @@ class PCMQueueInAudioInputStream : public AudioInputStream {
   DISALLOW_COPY_AND_ASSIGN(PCMQueueInAudioInputStream);
 };
 
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_MAC_AUDIO_INPUT_MAC_H_