ServiceWorker: Make "ready" fetches registration from browser process(2/3).

chrome/test/data/push_messaging/push_test.js

 // Copyright 2014 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.
 
 'use strict';
 
 var resultQueue = new ResultQueue();
 var pushRegistration = null;
 
 // Sends data back to the test. This must be in response to an earlier
@@ skipping 74 matching lines @@
 function removeManifest() {
   var element = document.querySelector('link[rel="manifest"]');
   if (element) {
     element.parentNode.removeChild(element);
     sendResultToTest('manifest removed');
   } else {
     sendResultToTest('unable to find manifest element');
   }
 }
 
+// TODO(xiang): Remove this function after "ready" CL landed.
+function getReadyRegistration() {
+  return navigator.serviceWorker.getRegistration().then(function(r) {
+    if (r.active)
+      return r;
+    var worker = r.waiting ? r.waiting : r.installing;
+    return new Promise(function(resolve) {
+      worker.onstatechange = function() {
+        if (worker.state === 'activating')
+          resolve(r);
+      };
+    });
+  });
+}
+
 function registerPush() {
-  navigator.serviceWorker.ready.then(function(swRegistration) {
+  getReadyRegistration().then(function(swRegistration) {
     var registerMethodName =
         swRegistration.pushManager.register ? 'register' : 'subscribe';
     return swRegistration.pushManager[registerMethodName]()
         .then(function(registration) {
           pushRegistration = registration;
           sendResultToTest(registration.endpoint + ' - ' +
               (registration.registrationId || registration.subscriptionId));
         });
   }).catch(sendErrorToTest);
 }
 
 function hasPermission() {
-  navigator.serviceWorker.ready.then(function(swRegistration) {
+  getReadyRegistration().then(function(swRegistration) {
     return swRegistration.pushManager.hasPermission()
         .then(function(permission) {
           sendResultToTest('permission status - ' + permission);
         });
   }).catch(sendErrorToTest);
 }
 
 function isControlled() {
   if (navigator.serviceWorker.controller) {
     sendResultToTest('true - is controlled');
@@ skipping 11 matching lines @@
   var unregisterMethodName =
       pushRegistration.unregister ? 'unregister' : 'unsubscribe';
   pushRegistration[unregisterMethodName]().then(function(result) {
     sendResultToTest('unregister result: ' + result);
   }, function(error) {
     sendResultToTest('unregister error: ' + error.name + ': ' + error.message);
   });
 }
 
 function hasRegistration() {
-  navigator.serviceWorker.ready.then(function(swRegistration) {
+  getReadyRegistration().then(function(swRegistration) {
     return swRegistration.pushManager.getSubscription();
   }).then(function(subscription) {
     sendResultToTest(subscription ? 'true - registered'
                                   : 'false - not registered');
   }).catch(sendErrorToTest);
 }
 
 addEventListener('message', function(event) {
   var message = JSON.parse(event.data);
   if (message.type == 'push')
     resultQueue.push(message.data);
 }, false);