MD Settings: remove unsupported routes from guest-mode.

chrome/browser/resources/settings/passwords_and_forms_page/passwords_and_forms_page.js

 // Copyright 2015 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.
 
 Polymer({
   is: 'settings-passwords-and-forms-page',
 
   behaviors: [PrefsBehavior],
 
   properties: {
     /** @private Filter applied to passwords and password exceptions. */
     passwordFilter_: String,
 
     /** @type {?Map<string, string>} */
     focusConfig: Object,
   },
 
   /** @override */
   ready: function() {
     this.focusConfig_ = new Map();
-    this.focusConfig_.set(
-        settings.Route.AUTOFILL.path, '#autofillManagerButton .subpage-arrow');
-    this.focusConfig_.set(
-        settings.Route.MANAGE_PASSWORDS.path,
-        '#passwordManagerButton .subpage-arrow');
+    if (settings.routes.AUTOFILL) {
+      this.focusConfig_.set(
+          settings.routes.AUTOFILL.path,
+          '#autofillManagerButton .subpage-arrow');
+    }
+    if (settings.routes.MANAGE_PASSWORDS) {
+      this.focusConfig_.set(
+          settings.routes.MANAGE_PASSWORDS.path,
+          '#passwordManagerButton .subpage-arrow');
+    }
   },
 
   /**
    * Shows the manage autofill sub page.
    * @param {!Event} event
    * @private
    */
   onAutofillTap_: function(event) {
-    settings.navigateTo(settings.Route.AUTOFILL);
+    settings.navigateTo(settings.routes.AUTOFILL);
   },
 
   /**
    * Shows the manage passwords sub page.
    * @param {!Event} event
    * @private
    */
   onPasswordsTap_: function(event) {
-    settings.navigateTo(settings.Route.MANAGE_PASSWORDS);
+    settings.navigateTo(settings.routes.MANAGE_PASSWORDS);
   },
 });