kiosk: Show enrollment screen first if needed.

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

 // Copyright 2013 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 Deferred resource loader for OOBE/Login screens.
  */
 
 cr.define('cr.ui.login.ResourceLoader', function() {
   'use strict';
@@ skipping 135 matching lines @@
   }
 
   /**
    * Finishes loading an asset bundle.
    * @param {string} id Identifier of the asset bundle.
    */
   function finishedLoading(id) {
     var assets = ASSETS[id];
     console.log('Finished loading asset bundle', id);
     assets.loaded = true;
-    window.setTimeout(assets.callback, 0);
+    window.setTimeout(function() {
+      assets.callback();
+      chrome.send('screenAssetsLoaded', [id]);
+    }, 0);
   }
 
   /**
    * Load an asset bundle, invoking the callback when finished.
    * @param {string} id Identifier for the asset bundle to load.
    * @param {function()=} callback Function to invoke when done loading.
    */
   function loadAssets(id, callback) {
     var assets = ASSETS[id];
     assets.callback = callback || function() {};
     console.log('Loading asset bundle', id);
     if (alreadyLoadedAssets(id))
       console.warn('asset bundle', id, 'already loaded!');
     if (assets.count == 0) {
       finishedLoading(id);
     } else {
       assets.css.forEach(loadCSS.bind(null, id));
       assets.js.forEach(loadJS.bind(null, id));
       assets.html.forEach(loadHTML.bind(null, id));
     }
   }
 
   return {
     alreadyLoadedAssets: alreadyLoadedAssets,
     hasDeferredAssets: hasDeferredAssets,
     loadAssets: loadAssets,
     registerAssets: registerAssets
   };
 });