chromium/content/test/data/service_worker/worker_install_fulfilled.js

// Copyright 2014 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

this.oninstall = function(event) {
    event.waitUntil(new Promise(function(r) { setTimeout(r, 5); }));
    event.waitUntil(1);
};