function targetCreated(target)
    {
        if (!this._connection || !target) {
            this._manager._workers.delete(workerId);
            return;
        }
        this._target = target;
        this._manager.dispatchEventToListeners(WebInspector.ServiceWorkerManager.Events.WorkersUpdated);
        target.runtimeAgent().run();
    }
@param {?WebInspector.Target} target
@this {WebInspector.ServiceWorker}