Extension SW - add basic push messaging tests.

chrome/test/data/extensions/api_test/service_worker/push_messaging/page.js

Index: chrome/test/data/extensions/api_test/service_worker/push_messaging/page.js
diff --git a/chrome/test/data/extensions/api_test/service_worker/push_messaging/page.js b/chrome/test/data/extensions/api_test/service_worker/push_messaging/page.js
new file mode 100644
index 0000000000000000000000000000000000000000..49e25f0f8649d5005b1b6db6729235bbde192e55
--- /dev/null
+++ b/chrome/test/data/extensions/api_test/service_worker/push_messaging/page.js
@@ -0,0 +1,42 @@
+// 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 startServiceWorker = new Promise(function(resolve, reject) {
+  navigator.serviceWorker.register('sw.js').then(function() {
+    // Wait until the service worker is active.
+    return navigator.serviceWorker.ready;
+  }).then(function(registration) {
+    var serviceWorker = registration.active;
+    registration.pushManager.subscribe({
+      userVisibleOnly:true
+    }).then(function(subscription) {
+      resolve(serviceWorker);
+    }).catch(function(err) {
+      reject('pushManager.subscription: ' + err);
+    });
+  }).catch(function(err) {
+    reject(err);
+  });
+});
+
+window.runServiceWorker = function() {
+  var sendMessage = function(str, opt_extraLogStr) {
+    console.log(str);
+    if (opt_extraLogStr) {
+      console.log(opt_extraLogStr);
+    }
+    chrome.test.sendMessage(str);
+  };
+
+  startServiceWorker.then(function(serviceWorker) {
+    var mc = new MessageChannel();
+    serviceWorker.postMessage('waitForPushMessaging', [mc.port2]);
+    mc.port1.onmessage = function(e) {
+      sendMessage(e.data == 'testdata' ? 'OK' : 'FAIL', 'message: ' + e.data);
+    };
+    sendMessage('SERVICE_WORKER_READY');
+  }).catch(function(err) {
+    sendMessage('SERVICE_WORKER_FAILURE', err);
+  });
+};