Support for audio output devices for getMediaDevices.

content/renderer/media/media_stream_dispatcher.cc

Index: content/renderer/media/media_stream_dispatcher.cc
diff --git a/content/renderer/media/media_stream_dispatcher.cc b/content/renderer/media/media_stream_dispatcher.cc
index 6446c3c6930155942467b7bca5910d760259e5d4..0a2da78e8bd95f12f8453220e36af8661fba0758 100644
--- a/content/renderer/media/media_stream_dispatcher.cc
+++ b/content/renderer/media/media_stream_dispatcher.cc
@@ -137,7 +137,8 @@ void MediaStreamDispatcher::EnumerateDevices(
     const GURL& security_origin) {
   DCHECK(main_loop_->BelongsToCurrentThread());
   DCHECK(type == MEDIA_DEVICE_AUDIO_CAPTURE ||
-         type == MEDIA_DEVICE_VIDEO_CAPTURE);
+         type == MEDIA_DEVICE_VIDEO_CAPTURE ||
+         type == MEDIA_DEVICE_AUDIO_OUTPUT);
   DVLOG(1) << "MediaStreamDispatcher::EnumerateDevices("
            << request_id << ")";
 
@@ -298,7 +299,7 @@ void MediaStreamDispatcher::OnDeviceStopped(
     return;
   }
   Stream* stream = &it->second;
-  if (IsAudioMediaType(device_info.device.type))
+  if (IsAudioInputMediaType(device_info.device.type))
     RemoveStreamDeviceFromArray(device_info, &stream->audio_array);
   else
     RemoveStreamDeviceFromArray(device_info, &stream->video_array);
@@ -336,7 +337,7 @@ void MediaStreamDispatcher::OnDeviceOpened(
     if (request.ipc_request == request_id) {
       Stream new_stream;
       new_stream.handler = request.handler;
-      if (IsAudioMediaType(device_info.device.type)) {
+      if (IsAudioInputMediaType(device_info.device.type)) {
         new_stream.audio_array.push_back(device_info);
       } else if (IsVideoMediaType(device_info.device.type)) {
         new_stream.video_array.push_back(device_info);