Bug 1059295 - sending the getUserMedia:revoke notification with the "screen:" prefix doesn't stop app sharing r=jesup

dom/media/MediaManager.cpp

@@ -2320,6 +2320,7 @@ GetUserMediaCallbackMediaStreamListener::StopScreenWindowSharing()
   NS_ASSERTION(NS_IsMainThread(), "Only call on main thread");
   if (mVideoSource && !mStopped &&
       (mVideoSource->GetMediaSource() == MediaSourceType::Screen ||
+       mVideoSource->GetMediaSource() == MediaSourceType::Application ||
        mVideoSource->GetMediaSource() == MediaSourceType::Window)) {
     // Stop the whole stream if there's no audio; just the video track if we have both
     nsRefPtr<MediaOperationRunnable> runnable(