Settings Router Refactor: Remove route.page legacy property.

chrome/browser/resources/settings/device_page/device_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-device-page' is the settings page for device and
  * peripheral settings.
  */
 Polymer({
   is: 'settings-device-page',
@@ skipping 122 matching lines @@
     this.$.pointersRow.hidden = !hasMouse && !hasTouchpad;
     this.checkPointerSubpage_();
   },
 
   /**
    * Leaves the pointer subpage if all pointing devices are detached.
    * @private
    */
   checkPointerSubpage_: function() {
     if (!this.hasMouse_ && !this.hasTouchpad_ &&
-        this.isCurrentRouteOnPointersPage_()) {
+        this.currentRoute == settings.Route.POINTERS) {
       this.$.pages.fire('subpage-back');
     }
   },
-
-  /**
-   * TODO(michaelpg): create generic fn for this and isCurrentRouteOnSyncPage_.
-   * @return {boolean} Whether the current route shows the pointers page.
-   * @private
-   */
-  isCurrentRouteOnPointersPage_: function() {
-    return this.currentRoute &&
-        this.currentRoute.page == 'basic' &&
-        this.currentRoute.section == 'device' &&
-        this.currentRoute.subpage.length == 1 &&
-        this.currentRoute.subpage[0] == 'pointers';
-  },
 });