--- a/dom/media/webrtc/MediaEngineWebRTC.cpp
+++ b/dom/media/webrtc/MediaEngineWebRTC.cpp
@@ -211,17 +211,18 @@ MediaEngineWebRTC::EnumerateMicrophoneDe
   }
 }
 
 void
 MediaEngineWebRTC::EnumerateDevices(uint64_t aWindowId,
                                     dom::MediaSourceEnum aMediaSource,
                                     nsTArray<RefPtr<MediaEngineSource> >* aSources)
 {
-  // We spawn threads to handle gUM runnables, so we must protect the member vars
+  // We spawn threads to handle gUM runnables, so we must protect the member
+  // vars
   MutexAutoLock lock(mMutex);
   if (MediaEngineSource::IsVideo(aMediaSource)) {
     EnumerateVideoDevices(aWindowId, aMediaSource, aSources);
   } else if (aMediaSource == dom::MediaSourceEnum::AudioCapture) {
     RefPtr<MediaEngineWebRTCAudioCaptureSource> audioCaptureSource =
       new MediaEngineWebRTCAudioCaptureSource(nullptr);
     aSources->AppendElement(audioCaptureSource);
   } else {