MD Settings: Hook up about_page to new LifetimeBrowserProxy.

chrome/browser/resources/settings/about_page/about_page_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 from the "About" section to interact with
  * the browser.
  */
 
 <if expr="chromeos">
@@ skipping 90 matching lines @@
      * Indicates to the browser that the page is ready.
      */
     pageReady: function() {},
 
     /**
      * Request update status from the browser. It results in one or more
      * 'update-status-changed' WebUI events.
      */
     refreshUpdateStatus: function() {},
 
-    /**
-     * Relaunches the browser.
-     */
-    relaunchNow: function() {},
-
     /** Opens the help page. */
     openHelpPage: function() {},
 
 <if expr="_google_chrome">
     /**
      * Opens the feedback dialog.
      */
     openFeedbackDialog: function() {},
 </if>
 
@@ skipping 35 matching lines @@
     pageReady: function() {
       chrome.send('aboutPageReady');
     },
 
     /** @override */
     refreshUpdateStatus: function() {
       chrome.send('refreshUpdateStatus');
     },
 
     /** @override */
-    relaunchNow: function() {
-      chrome.send('relaunchNow');
-    },
-
-    /** @override */
     openHelpPage: function() {
       chrome.send('openHelpPage');
     },
 
 <if expr="_google_chrome">
     /** @override */
     openFeedbackDialog: function() {
       chrome.send('openFeedbackDialog');
     },
 </if>
@@ skipping 31 matching lines @@
 </if>
   };
 
   return {
     AboutPageBrowserProxy: AboutPageBrowserProxy,
     AboutPageBrowserProxyImpl: AboutPageBrowserProxyImpl,
     browserChannelToI18nId: browserChannelToI18nId,
     isTargetChannelMoreStable: isTargetChannelMoreStable,
   };
 });