MD Settings: remove unsupported routes from guest-mode.

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({
@@ skipping 63 matching lines @@
       type: Boolean,
       computed: 'computeShowCheckUpdates_(' +
           'currentUpdateStatusEvent_, hasCheckedForUpdates_)',
     },
 
     /** @private {!Map<string, string>} */
     focusConfig_: {
       type: Object,
       value: function() {
         var map = new Map();
-        map.set(
-            settings.Route.DETAILED_BUILD_INFO.path,
-            '#detailed-build-info-trigger');
+        if (settings.routes.DETAILED_BUILD_INFO) {
+          map.set(
+              settings.routes.DETAILED_BUILD_INFO.path,
+              '#detailed-build-info-trigger');
+        }
         return map;
       },
     },
 
     /** @private */
     showUpdateWarningDialog_: {
       type: Boolean,
       value: false,
     },
 
@@ skipping 286 matching lines @@
    */
   isTargetChannelMoreStable_: function() {
     assert(this.currentChannel_.length > 0);
     assert(this.targetChannel_.length > 0);
     return settings.isTargetChannelMoreStable(
         this.currentChannel_, this.targetChannel_);
   },
 
   /** @private */
   onDetailedBuildInfoTap_: function() {
-    settings.navigateTo(settings.Route.DETAILED_BUILD_INFO);
+    settings.navigateTo(settings.routes.DETAILED_BUILD_INFO);
   },
 
   /** @private */
   onRelaunchAndPowerwashTap_: function() {
     this.lifetimeBrowserProxy_.factoryReset();
   },
 
   /**
    * @return {boolean}
    * @private
@@ skipping 51 matching lines @@
         });
   },
 
   // <if expr="_google_chrome">
   /** @private */
   onReportIssueTap_: function() {
     this.aboutBrowserProxy_.openFeedbackDialog();
   },
   // </if>
 });