function connectForwardChannel(
    serverVersion = undefined, hostPrefix = undefined, opt_uriPrefix,
    spdyEnabled = undefined) {
  stubSpdyCheck(!!spdyEnabled);
  const uriPrefix = opt_uriPrefix || '';
  channel.connect(`${uriPrefix}/bind`, null);
  mockClock.tick(0);
  completeForwardChannel(serverVersion, hostPrefix);
}
@param {number=} serverVersion
@param {string=} hostPrefix
@param {string=} opt_uriPrefix
@param {boolean=} spdyEnabled