Looking up device id by session id for AudioRendererMixerInput

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 35e159c4f5e80bb078bb997ba5bda38db5adab51..74c508ae1907fefeb6bb009e44a7415d6335628f 100644
--- a/content/common/media/audio_messages.h
+++ b/content/common/media/audio_messages.h
@@ -48,10 +48,11 @@ IPC_STRUCT_END()
 // Tell the renderer process that an audio output device has been authorized
 // for a given stream. The renderer is given the output parameters for the
 // authorized device.
-IPC_MESSAGE_CONTROL3(AudioMsg_NotifyDeviceAuthorized,
+IPC_MESSAGE_CONTROL4(AudioMsg_NotifyDeviceAuthorized,
                      int /* stream id */,
                      media::OutputDeviceStatus /* device_status */,
-                     media::AudioParameters /* output parameters */)
+                     media::AudioParameters /* output parameters */,
+                     std::string /* matched_device_id */)
 
 // Tell the renderer process that an audio stream has been created.
 // The renderer process is given a shared memory handle for the audio data