Settings Router Refactor: Remove route.page legacy property.

chrome/browser/resources/settings/settings_main/settings_main.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-main' displays the selected settings page.
  */
 Polymer({
   is: 'settings-main',
@@ skipping 104 matching lines @@
     return showBasicPage && !inSubpage;
   },
 
   /**
    * @private
    */
   currentRouteChanged_: function(newRoute) {
     this.inSubpage_ = newRoute.subpage.length > 0;
     this.style.height = this.inSubpage_ ? '100%' : '';
 
-    if (newRoute.page == 'about') {
+    if (settings.Route.ABOUT.contains(newRoute)) {
       this.showPages_ = {about: true, basic: false, advanced: false};
     } else {
       this.showPages_ = {
         about: false,
-        basic: newRoute.page == 'basic' || !this.inSubpage_,
-        advanced: newRoute.page == 'advanced' ||
+        basic: settings.Route.BASIC.contains(newRoute) || !this.inSubpage_,
+        advanced: settings.Route.ADVANCED.contains(newRoute) ||
             (!this.inSubpage_ && this.advancedToggleExpanded_),
       };
 
       if (this.showPages_.advanced) {
         assert(!this.pageVisibility ||
             this.pageVisibility.advancedSettings !== false);
         this.advancedToggleExpanded_ = true;
       }
     }
 
@@ skipping 99 matching lines @@
 
   /**
    * @param {(boolean|undefined)} visibility
    * @return {boolean} True unless visibility is false.
    * @private
    */
   showAdvancedSettings_: function(visibility) {
     return visibility !== false;
   },
 });