Enable the PIN keyboard on the lockscreen.

ui/login/account_picker/user_pod_row.js

 // Copyright 2014 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 User pod row implementation.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 760 matching lines @@
       this.tabIndex = UserPodTabOrder.POD_INPUT;
     },
 
     /**
      * Handles the user hitting 'submit' on the PIN keyboard.
      * @param {Event} e Submit event object.
      * @private
      */
     handlePinSubmitted_: function(e) {
       var pin = e.detail.pin;
-      chrome.send('authenticateUserWithPin', [this.user.username, pin]);
+      chrome.send('authenticateUser', [this.user.username, pin]);
     },
 
     /**
      * Handles keypress event (i.e. any textual input) on password input.
      * @param {Event} e Keypress Event object.
      * @private
      */
     handlePasswordKeyPress_: function(e) {
       // When tabbing from the system tray a tab key press is received. Suppress
       // this so as not to type a tab character into the password field.
@@ skipping 2568 matching lines @@
        if (pod && pod.multiProfilesPolicyApplied) {
          pod.userTypeBubbleElement.classList.remove('bubble-shown');
        }
      }
   };
 
   return {
     PodRow: PodRow
   };
 });