CrOS Settings: Add skeleton page for multidevice section.

chrome/browser/resources/settings/page_visibility.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.
 
 /**
  * Specifies page visibility in guest mode in cr and cros.
  * @typedef {{
  *   advancedSettings: (boolean|undefined),
  *   appearance: (boolean|undefined|AppearancePageVisibility),
  *   dateTime: (boolean|undefined|DateTimePageVisibility),
  *   defaultBrowser: (boolean|undefined),
  *   downloads: (undefined|DownloadsPageVisibility),
+ *   multidevice: (boolean|undefined),
  *   onStartup: (boolean|undefined),
  *   passwordsAndForms: (boolean|undefined),
  *   people: (boolean|undefined),
  *   privacy: (undefined|PrivacyPageVisibility),
  *   reset:(boolean|undefined),
  * }}
  */
 var GuestModePageVisibility;
 
 /**
@@ skipping 67 matching lines @@
         pageZoom: false,
       },
       advancedSettings: true,
       privacy: {
         searchPrediction: false,
         networkPrediction: false,
       },
       downloads: {
         googleDrive: false,
       },
+      multidevice: false,
     };
     // </if>
   }
 
   return {pageVisibility: pageVisibility};
 });