Allow navigation to chrome://md-settings/pointer-overlay

chrome/browser/resources/settings/device_page/pointers.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-pointers' is the settings subpage with mouse and touchpad settings.
  */
 Polymer({
   is: 'settings-pointers',
 
   properties: {
-    /** Preferences state. */
     prefs: {
       type: Object,
       notify: true,
     },
 
-    hasMouse: {
-      type: Boolean,
-      value: false,
-    },
+    hasMouse: Boolean,
 
-    hasTouchpad: {
-      type: Boolean,
-      value: false,
-    },
+    hasTouchpad: Boolean,
 
     /**
      * TODO(michaelpg): cr-slider should optionally take a min and max so we
      * don't have to generate a simple range of natural numbers ourselves.
      * @const {!Array<number>}
      * @private
      */
     sensitivityValues_: {
       type: Array,
       value: [1, 2, 3, 4, 5],
       readOnly: true,
     },
   },
 
   /**
    * Prevents the link from activating its parent paper-radio-button.
    * @param {!Event} e
    * @private
    */
   onLearnMoreLinkActivated_: function(e) {
     settings.DevicePageBrowserProxyImpl.getInstance().handleLinkEvent(e);
   },
 
-  // Mouse and touchpad sections are only subsections if they are both present.
+  /**
+   * Mouse and touchpad sections are only subsections if they are both present.
+   * @param {boolean} hasMouse
+   * @param {boolean} hasTouchpad
+   * @return {string}
+   */
   getSubsectionClass_: function(hasMouse, hasTouchpad) {
     return hasMouse && hasTouchpad ? 'subsection' : '';
   },
 });