cros: Fixed 3 bugs for pin unlock.

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

 // Copyright (c) 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 Login UI based on a stripped down OOBE controller.
  */
 
 <include src="login_shared.js">
 
 /**
  * Asynchronously loads the pin keyboard.
  */
 function showPinKeyboardAsync() {
   'use strict';
 
   // This function could get called multiple times. Do nothing if we have
   // already loaded. This check needs to happen before the registerAssets call,
   // because that will clobber the loaded state.
-  if (cr.ui.login.ResourceLoader.alreadyLoadedAssets('custom-elements'))
+  if (cr.ui.login.ResourceLoader.hasDeferredAssets('custom-elements'))
     return;
 
   // Register loader for custom elements.
   cr.ui.login.ResourceLoader.registerAssets({
     id: 'custom-elements',
     html: [{ url: 'chrome://oobe/custom_elements.html' }]
   });
 
   // Called after polymer has been loaded. Fades the pin element in.
   var onPinLoaded = function(pinKeyboard) {
@@ skipping 50 matching lines @@
      * Reloads content of the page.
      * @param {!Object} data New dictionary with i18n values.
      */
     reloadContent: function(data) {
       loadTimeData.overrideValues(data);
       i18nTemplate.process(document, loadTimeData);
       Oobe.getInstance().updateLocalizedContent_();
     },
   };
 });