cros: HTML fixes needed to reinitializing an existing lock WebUI.

ui/login/account_picker/screen_account_picker.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 Account picker screen implementation.
  */
 
 login.createScreen('AccountPickerScreen', 'account-picker', function() {
   /**
@@ skipping 248 matching lines @@
         ensureTransitionEndEvent(activatedPod);
       }
     },
 
     /**
      * Loads the PIN keyboard if any of the users can login with a PIN. Disables
      * the PIN keyboard for users who are not allowed to use PIN unlock.
      * @param {array} users Array of user instances.
      */
     initializePinKeyboardStateForUsers_: function(users) {
+      // It is possible that the PIN keyboard HTML has already been loaded. If
+      // that is the case, we want to show the user pods with the PIN keyboard
+      // immediately without running the PIN show/hide effect.
+      document.body.classList.add('disable-pin-animation');
+      setTimeout(function() {
+        document.body.classList.remove('disable-pin-animation');
+      });
+
       for (var i = 0; i < users.length; ++i) {
         var user = users[i];
         if (user.showPin) {
           showPinKeyboardAsync();
         } else {
           // Disable pin for users who cannot authenticate with PIN. For
           // example, users who have not set up PIN or users who have not
           // entered their account recently. Otherwise, the PIN keyboard will
           // will appear for any user if there is at least one user who has PIN
           // enabled.
@@ skipping 186 matching lines @@
      * @param {string} userID The user ID of the public session
      * @param {string} locale The locale to which this list of keyboard layouts
      *     applies
      * @param {!Object} list List of available keyboard layouts
      */
     setPublicSessionKeyboardLayouts: function(userID, locale, list) {
       $('pod-row').setPublicSessionKeyboardLayouts(userID, locale, list);
     }
   };
 });