MD Settings: remove unsupported routes from guest-mode.

chrome/browser/resources/settings/search_engines_page/search_engines_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.
 
 /**
  * @fileoverview 'settings-search-engines-page' is the settings page
  * containing search engines settings.
  */
 Polymer({
   is: 'settings-search-engines-page',
@@ skipping 24 matching lines @@
         return [];
       }
     },
 
     /**
      * Needed by GlobalScrollTargetBehavior.
      * @override
      */
     subpageRoute: {
       type: Object,
-      value: settings.Route.SEARCH_ENGINES,
+      value: settings.routes.SEARCH_ENGINES,
     },
 
     /** @private {boolean} */
     showAddSearchEngineDialog_: Boolean,
 
     /** @private {boolean} */
     showExtensionsList_: {
       type: Boolean,
       computed: 'computeShowExtensionsList_(extensions)',
     },
@@ skipping 59 matching lines @@
         cr.ui.focusWithoutInk(assert(this.$.addSearchEngine));
       }.bind(this));
     }.bind(this));
   },
 
   /** @private */
   computeShowExtensionsList_: function() {
     return this.extensions.length > 0;
   },
 });