Convert Google Now's use of chrome.local.storage.get to use Promises

chrome/browser/resources/google_now/cards.js

 // Copyright 2013 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';
 
 /**
  * Show/hide trigger in a card.
  *
  * @typedef {{
@@ skipping 309 matching lines @@
     }
   }
 
   instrumented.alarms.onAlarm.addListener(function(alarm) {
     console.log('cardManager.onAlarm ' + JSON.stringify(alarm));
 
     if (alarm.name.indexOf(alarmPrefix) == 0) {
       // Alarm to show the card.
       tasks.add(UPDATE_CARD_TASK_NAME, function() {
         var cardId = alarm.name.substring(alarmPrefix.length);
-        instrumented.storage.local.get(
-            ['notificationsData', 'notificationGroups'],
-            function(items) {
-              console.log('cardManager.onAlarm.get ' + JSON.stringify(items));
-              items = items || {};
-              /** @type {Object.<string, NotificationDataEntry>} */
-              items.notificationsData = items.notificationsData || {};
-              /** @type {Object.<string, StoredNotificationGroup>} */
-              items.notificationGroups = items.notificationGroups || {};
+        fillFromChromeLocalStorage({
+          /** @type {Object.<string, NotificationDataEntry>} */
+          notificationsData: {},
+          /** @type {Object.<string, StoredNotificationGroup>} */
+          notificationGroups: {}
+        }).then(function(items) {
+          console.log('cardManager.onAlarm.get ' + JSON.stringify(items));
 
-              var combinedCard =
-                (items.notificationsData[cardId] &&
-                 items.notificationsData[cardId].combinedCard) || [];
+          var combinedCard =
+            (items.notificationsData[cardId] &&
+             items.notificationsData[cardId].combinedCard) || [];
 
-              var cardShownCallback = undefined;
-              if (localStorage['explanatoryCardsShown'] <
-                  EXPLANATORY_CARDS_LINK_THRESHOLD) {
-                 cardShownCallback = countExplanatoryCard;
-              }
+          var cardShownCallback = undefined;
+          if (localStorage['explanatoryCardsShown'] <
+              EXPLANATORY_CARDS_LINK_THRESHOLD) {
+             cardShownCallback = countExplanatoryCard;
+          }
 
-              items.notificationsData[cardId] =
-                  update(
-                      cardId,
-                      combinedCard,
-                      items.notificationGroups,
-                      cardShownCallback);
+          items.notificationsData[cardId] =
+              update(
+                  cardId,
+                  combinedCard,
+                  items.notificationGroups,
+                  cardShownCallback);
 
-              chrome.storage.local.set(items);
-            });
+          chrome.storage.local.set(items);
+        });
       });
     }
   });
 
   return {
     update: update,
     onDismissal: onDismissal
   };
 }