Add test without skipWaiting() to demonstrate extension & service worker update.

chrome/test/data/extensions/api_test/service_worker/update_without_skip_waiting/v2/page.js

Index: chrome/test/data/extensions/api_test/service_worker/update_without_skip_waiting/v2/page.js
diff --git a/chrome/test/data/extensions/api_test/service_worker/update_without_skip_waiting/v2/page.js b/chrome/test/data/extensions/api_test/service_worker/update_without_skip_waiting/v2/page.js
new file mode 100644
index 0000000000000000000000000000000000000000..ac755f70dc9e01a9b02eae14ef7a065ee3148447
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/service_worker/update_without_skip_waiting/v2/page.js
@@ -0,0 +1,41 @@
+// Copyright 2015 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+var controllerChangePromise = new Promise(function(resolve, reject) {
+  navigator.serviceWorker.oncontrollerchange = function(e) {
+    navigator.serviceWorker.ready.then(function(registration) {
+      resolve(registration.active);
+    }).catch(function(err) {
+      reject('oncontrollerchange failure');
+    });
+  };
+});

[falken, 2015/12/09 03:59:16]

Remove this dead code.

[lazyboy, 2015/12/09 21:47:56]

Done.

+
+var registerServiceWorkerPromise = new Promise(function(resolve, reject) {
+  var serviceWorkerRegistration;
+  navigator.serviceWorker.register('sw.js').then(function() {
+    return navigator.serviceWorker.ready;
+  }).then(function(registration) {
+    serviceWorkerRegistration = registration;
+    return registration.update();
+  }).then(function() {
+    resolve(serviceWorkerRegistration.active);

[falken, 2015/12/09 03:59:16]

This is kind of tricky. The update() promise resolves before update actually
completes. It resolves once the new version starts being installed. So this code
that's trying to wait for update to complete actually isn't.

[lazyboy, 2015/12/09 21:47:56]

OK, I'm waiting for registration.onupdatefound now when we expect an update. I'm
also looking for waiting worker's existence before proceeding.

+  }).catch(function(err) {
+    reject(err);
+  });
+});
+
+Promise.all([registerServiceWorkerPromise])
+    .then(function(results) {
+  var serviceWorker = results[0];
+  var channel = new MessageChannel();
+  channel.port1.onmessage = function(e) {
+    console.log('Message received from SW: ' + e.data);
+    chrome.test.sendMessage(e.data);
+  };
+  serviceWorker.postMessage('ping', [channel.port2]);
+}).catch(function(err) {
+  console.log(err);
+  chrome.test.sendMessage('FAILURE_V2');
+});