Move media/audio files into media namespace

media/audio/audio_input_stream_impl.h

Index: media/audio/audio_input_stream_impl.h
diff --git a/media/audio/audio_input_stream_impl.h b/media/audio/audio_input_stream_impl.h
index d223985f3cdaa39e67bac9224b6abc9f4a4d5363..64980a979fedb0a0c4ed2c3c78727c0fa1a2f919 100644
--- a/media/audio/audio_input_stream_impl.h
+++ b/media/audio/audio_input_stream_impl.h
@@ -10,6 +10,8 @@
 #include "base/time.h"
 #include "media/audio/audio_io.h"
 
+namespace media {
+
 // AudioInputStreamImpl implements platform-independent parts of the
 // AudioInputStream interface. Each platform dependent implementation
 // should derive from this class.
@@ -64,4 +66,6 @@ class MEDIA_EXPORT AudioInputStreamImpl : public AudioInputStream {
   DISALLOW_COPY_AND_ASSIGN(AudioInputStreamImpl);
 };
 
+}  // namespace media
+
 #endif  // MEDIA_AUDIO_AUDIO_INPUT_STREAM_IMPL_H_