Update navigator.services API to use the new services.onconnect event [1/3].

LayoutTests/http/tests/navigatorconnect/resources/async-connect-worker.js

 self.addEventListener('crossoriginconnect', function(event) {
   var targetUrl = new URL(event.client.targetUrl);
   event.acceptConnection(new Promise(function(resolve, reject) {
       if (targetUrl.search == "?accept")
         self.setTimeout(resolve, 1, true);
       else
         self.setTimeout(reject, 1);
     }));
 });
+
+navigator.services.addEventListener('connect', function(event) {
+  var targetUrl = new URL(event.targetURL);
+  event.respondWith(new Promise(function(resolve, reject) {
+      if (targetUrl.search == "?accept")
+        self.setTimeout(resolve, 1, {accept: true});
+      else
+        self.setTimeout(reject, 1);
+    }));
+});