chromium/chrome/test/data/extensions/api_test/service_worker/worker_based_background/on_startup_event/service_worker_background.js

// Copyright 2018 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

chrome.runtime.onStartup.addListener(() => {
  chrome.test.sendMessage('onStartup event');
});

chrome.test.notifyPass();