servo/media/webrtc uses stdlib channels.

[gatoWololo]

It seems the webrtc controller uses regular std::sync::mpsc channels:

impl WebRtcController {
    pub fn new<T: WebRtcBackend>(signaller: Box<WebRtcSignaller>) -> Self {
        let (sender, receiver) = channel();

        let t = WebRtcController { sender };

        let mut controller = T::construct_webrtc_controller(signaller, t.clone());

        thread::spawn(move || {
            while let Ok(event) = receiver.recv() {
                if !handle_rtc_event(&mut controller, event) {
                    // shut down event loop
                    break;
                }
            }
        });

        t
    }

We should check for other uses of these channels.