Reland 15721002: Hook up the device selection to the WebAudio live audio

content/common/media/audio_messages.h

Index: content/common/media/audio_messages.h
diff --git a/content/common/media/audio_messages.h b/content/common/media/audio_messages.h
index dc844ebaa391564d29ed562030e01ddf47bc7ad5..d52712dba4aeb8a752c11fa386b9bd3d15c80810 100644
--- a/content/common/media/audio_messages.h
+++ b/content/common/media/audio_messages.h
@@ -96,9 +96,10 @@ IPC_MESSAGE_CONTROL2(AudioInputMsg_NotifyStreamVolume,
 // Request that is sent to the browser for creating an audio output stream.
 // |render_view_id| is the routing ID for the render view producing the audio
 // data.
-IPC_MESSAGE_CONTROL3(AudioHostMsg_CreateStream,
+IPC_MESSAGE_CONTROL4(AudioHostMsg_CreateStream,
                      int /* stream_id */,
                      int /* render_view_id */,
+                     int /* session_id */,
                      media::AudioParameters /* params */)
 
 // Request that is sent to the browser for creating an audio input stream.