Move media/audio files into media namespace

media/audio/win/wavein_input_win.cc

Index: media/audio/win/wavein_input_win.cc
diff --git a/media/audio/win/wavein_input_win.cc b/media/audio/win/wavein_input_win.cc
index f8a4e7ded95e184b53eda5b64dae63ff8ce979b7..aff0c29d7c2ad2441e07ed804fec5fc5d979a58c 100644
--- a/media/audio/win/wavein_input_win.cc
+++ b/media/audio/win/wavein_input_win.cc
@@ -18,7 +18,7 @@ namespace {
 const int kStopInputStreamCallbackTimeout = 3000; // Three seconds.
 }
 
-using media::AudioDeviceNames;
+namespace media {
 
 // Our sound buffers are allocated once and kept in a linked list using the
 // the WAVEHDR::dwUser variable. The last buffer points to the first buffer.
@@ -285,3 +285,5 @@ void PCMWaveInAudioInputStream::WaveCallback(HWAVEIN hwi, UINT msg,
       obj->callback_->OnClose(obj);
   }
 }
+
+}  // namespace media