arc: Handle ARC events in MD Settings

chrome/browser/resources/settings/android_apps_page/android_apps_browser_proxy.js

 // Copyright 2016 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.
 
 /**
  * @fileoverview A helper object used by the "Google Play Store" (ARC) section
  * to retrieve information about android apps.
  */
 
 /**
- * @typedef {{appReady: boolean}}
+ * Type definition of AndroidAppsInfo entry. |playStoreEnabled| indicates that
+ * Play Store is enabled. |settingsAppAvailable| indicates that Android settings
+ * app is registered in the system.
+ * @typedef {{
+ *   playStoreEnabled: boolean,
+ *   settingsAppAvailable: boolean,
+ * }}
  * @see chrome/browser/ui/webui/settings/chromeos/android_apps_handler.cc
  */
 var AndroidAppsInfo;
 
 cr.define('settings', function() {
   /** @interface */
   function AndroidAppsBrowserProxy() {
   }
 
   AndroidAppsBrowserProxy.prototype = {
@@ skipping 27 matching lines @@
     showAndroidAppsSettings: function(keyboardAction) {
       chrome.send('showAndroidAppsSettings', [keyboardAction]);
     },
   };
 
   return {
     AndroidAppsBrowserProxy: AndroidAppsBrowserProxy,
     AndroidAppsBrowserProxyImpl: AndroidAppsBrowserProxyImpl,
   };
 });