Add mac-only "Set Up Automatic Updates..." button to the new about page.

chrome/browser/resources/settings/about_page/about_page.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-about-page' contains version and OS related
  * information.
  */
 Polymer({
   is: 'settings-about-page',
@@ skipping 17 matching lines @@
     /** @private {!BrowserChannel} */
     currentChannel_: String,
 
     /** @private {!BrowserChannel} */
     targetChannel_: String,
 
     /** @private {?RegulatoryInfo} */
     regulatoryInfo_: Object,
 </if>
 
+<if expr="_google_chrome and is_macosx">
+    /** @private {!PromoteUpdaterStatus} */
+    promoteUpdaterStatus_: Object,
+</if>
+
     /** @private {!{obsolete: boolean, endOfLine: boolean}} */
     obsoleteSystemInfo_: {
       type: Object,
       value: function() {
         return {
           obsolete: loadTimeData.getBoolean('aboutObsoleteNowOrSoon'),
           endOfLine: loadTimeData.getBoolean('aboutObsoleteEndOfTheLine'),
         };
       },
     },
@@ skipping 75 matching lines @@
 <if expr="not chromeos">
     this.startListening_();
 </if>
   },
 
   /** @private */
   startListening_: function() {
     this.addWebUIListener(
         'update-status-changed',
         this.onUpdateStatusChanged_.bind(this));
+<if expr="_google_chrome and is_macosx">
+    this.addWebUIListener(
+        'promotion-state-changed',
+        this.onPromoteUpdaterStatusChanged_.bind(this));
+</if>
     this.aboutBrowserProxy_.refreshUpdateStatus();
   },
 
   /**
    * @param {!UpdateStatusChangedEvent} event
    * @private
    */
   onUpdateStatusChanged_: function(event) {
 <if expr="chromeos">
     if (event.status == UpdateStatus.CHECKING)
       this.hasCheckedForUpdates_ = true;
 </if>
     this.currentUpdateStatusEvent_ = event;
   },
 
+<if expr="_google_chrome and is_macosx">
+  /**
+   * @param {!PromoteUpdaterStatus} status
+   * @private
+   */
+  onPromoteUpdaterStatusChanged_: function(status) {
+    this.promoteUpdaterStatus_ = status;
+  },
+
+  /**
+   * If #promoteUpdater isn't disabled, trigger update promotion.
+   * @private
+   */
+  onPromoteUpdaterTap_: function() {
+    // This is necessary because #promoteUpdater is not a button, so by default
+    // disable doesn't do anything.
+    if (this.promoteUpdaterStatus_.disabled)
+      return;
+    this.aboutBrowserProxy_.promoteUpdater();
+  },
+
+  /**
+   * @param {!Event} event
+   * @private
+   */
+  onLearnMoreTap_: function(event) {
+    // Stop the propagation of events, so that clicking on links inside
+    // actionable items won't trigger action.
+    event.stopPropagation();
+  },
+</if>
+
   /** @private */
   onHelpTap_: function() {
     this.aboutBrowserProxy_.openHelpPage();
   },
 
   /** @private */
   onRelaunchTap_: function() {
     this.lifetimeBrowserProxy_.relaunch();
   },
 
@@ skipping 196 matching lines @@
     });
   },
 
 <if expr="_google_chrome">
   /** @private */
   onReportIssueTap_: function() {
     this.aboutBrowserProxy_.openFeedbackDialog();
   },
 </if>
 });