[cros,login] Pre-load login extension in the background.

chrome/browser/resources/chromeos/login/screen_account_picker.js

 // Copyright (c) 2011 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.
  */
 
 cr.define('login', function() {
   /**
@@ skipping 25 matching lines @@
 
     /**
      * Event handler that is invoked just before the frame is shown.
      * @param data {string} Screen init payload.
      */
     onBeforeShow: function(data) {
       $('pod-row').handleShow();
       if (this.firstShown_) {
         this.firstShown_ = false;
         $('pod-row').startInitAnimation();
+        // TODO(altimofeev): call it after animation stops.
+        chrome.send('accountPickerReady', []);

[Nikita (slow), 2011/11/08 09:13:53]

As we figured out animation is currently turned off.

[altimofeev, 2011/11/08 11:40:20]

Done.

       }
     },
 
      /**
       * Event handler that is invoked just before the frame is hidden.
       * @param data {string} Screen init payload.
       */
     onBeforeHide: function(data) {
       $('pod-row').handleHide();
     }
@@ skipping 15 matching lines @@
    * @public
    */
   AccountPickerScreen.setCapsLockState = function(enabled) {
     $('pod-row').classList[enabled ? 'add' : 'remove']('capslock-on');
   };
 
   return {
     AccountPickerScreen: AccountPickerScreen
   };
 });