MD Settings: About page, implementing update status.

chrome/browser/resources/settings/about_page/detailed_build_info.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 'settings-detailed-build-info' contains detailed build
  * information for ChromeOS.
  */
 
-(function() {
-
-/**
- * @param {!BrowserChannel} channel
- * @return {string}
- */
-function browserChannelToI18nId(channel) {
-  switch (channel) {
-    case BrowserChannel.BETA: return 'aboutChannelBeta';
-    case BrowserChannel.DEV: return 'aboutChannelDev';
-    case BrowserChannel.STABLE: return 'aboutChannelStable';
-  }
-
-  assertNotReached();
-}
-
 Polymer({
   is: 'settings-detailed-build-info',
 
   behaviors: [I18nBehavior],
 
   properties: {
     /** @private {!VersionInfo} */
     versionInfo_: Object,
 
     /** @private */
     currentlyOnChannelText_: String,
   },
 
   /** @override */
   ready: function() {
     var browserProxy = settings.AboutPageBrowserProxyImpl.getInstance();
     browserProxy.pageReady();
 
     browserProxy.getVersionInfo().then(function(versionInfo) {
       this.versionInfo_ = versionInfo;
     }.bind(this));
     browserProxy.getCurrentChannel().then(function(channel) {
       this.currentlyOnChannelText_ = this.i18n(
           'aboutCurrentlyOnChannel',
-          this.i18n(browserChannelToI18nId(channel)));
+          this.i18n(settings.browserChannelToI18nId(channel)));
     }.bind(this));
   },
 
   /**
    * @param {string} version
    * @return {boolean}
    * @private
    */
   shouldShowVersion_: function(version) {
     return version.length > 0;
   },
 });
-
-})();