MD Settings: Add mouse settings, update pointer settings

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-touchpad' is the settings subpage with touchpad settings.
+ * 'settings-pointers' is the settings subpage with mouse and touchpad settings.
  */
 Polymer({
-  is: 'settings-touchpad',
+  is: 'settings-pointers',
+
+  behaviors: [
+    I18nBehavior,
+  ],
 
   properties: {
     /** Preferences state. */
     prefs: {
       type: Object,
       notify: true,
     },
+
+    hasMouse: {
+      type: Boolean,
+      value: false,
+    },
+
+    hasTouchpad: {
+      type: Boolean,
+      value: false,
+    },
   },
 
   /**
    * 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.
+  getSectionClass_: function(hasMouse, hasTouchpad) {
+    return hasMouse && hasTouchpad ? 'subsection' : '';
+  },
 });