MD Settings: Hooking up router to navigate to dummy About page.

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.
  *
  * Example:
  *
@@ skipping 18 matching lines @@
 
     /**
      * The current active route.
      */
     currentRoute: {
       type: Object,
       notify: true,
       observer: 'currentRouteChanged_',
     },
 
-    // If false the 'basic' page should be shown.
-    showAdvancedPage_: {
-      type: Boolean,
-      value: false
-    }
+    /** @private */
+    showAdvancedPage_: Boolean,
+
+    /** @private */
+    showBasicPage_: Boolean,
+
+    /** @private */
+    showAboutPage_: Boolean,
   },
 
-  /** @private */
-  currentRouteChanged_: function(newRoute, oldRoute) {
+  /**
+   * @param {!SettingsRoute} newRoute
+   * @private
+   */
+  currentRouteChanged_: function(newRoute) {
+    this.showAboutPage_ = newRoute.page == 'about';
     this.showAdvancedPage_ = newRoute.page == 'advanced';
+    this.showBasicPage_ = newRoute.page == 'basic';
   },
 });