ortc-2.js

var iceOptions = new RTCIceGatherOptions;
iceOptions.gatherPolicy = "all";
iceOptions.iceservers = ... ;
var iceGathr = new RTCIceGatherer(iceOptions);
iceGathr.onlocalcandidate = function(evt) {
    mySignaller.signalMessage({
        "candidate": evt.candidate
    });
};

Even though it works either way, please, append parentheses -
From -
var iceOptions = new RTCIceGatherOptions;
To -
var iceOptions = new RTCIceGatherOptions();