Pin keyboard works with virtual keyboard.

chrome/browser/resources/chromeos/login/login_shared.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 Common OOBE controller methods. This method is shared between
  * OOBE, login, and the lock screen. Add only methods that need to be shared
  * between all *three* screens here, as each additional method increases the
  * time it takes to show the lock screen.
  *
@@ skipping 376 matching lines @@
   };
 
   /**
    * Shows/hides login UI control bar with buttons like [Shut down].
    */
   Oobe.showControlBar = function(show) {
     Oobe.getInstance().headerHidden = !show;
   };
 
   /**
+   * Shows/hides pin keyboard on the lock screen.
+   */
+  Oobe.showPinKeyboard = function(show) {
+    Oobe.getInstance().pinHidden = !show;
+  };
+
+  /**
    * Sets the current size of the client area (display size).
    * @param {number} width client area width
    * @param {number} height client area height
    */
   Oobe.setClientAreaSize = function(width, height) {
     Oobe.getInstance().setClientAreaSize(width, height);
   };
 
   // Export
   return {
@@ skipping 14 matching lines @@
 
 
 (function() {
   'use strict';
 
   document.addEventListener('DOMContentLoaded', function() {
     Oobe.initialize();
   });
 })();