Retrieve the list of keyboard layouts for public sessions async

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 1037 matching lines @@
       learnMore.addEventListener('mousedown', stopEventPropagation);
       learnMore.addEventListener('click', this.handleLearnMoreEvent);
       learnMore.addEventListener('keydown', this.handleLearnMoreEvent);
 
       learnMore = this.querySelector('.expanded-pane-learn-more');
       learnMore.addEventListener('click', this.handleLearnMoreEvent);
       learnMore.addEventListener('keydown', this.handleLearnMoreEvent);
 
       var languageSelect = this.querySelector('.language-select');
       languageSelect.tabIndex = UserPodTabOrder.POD_INPUT;
-      languageSelect.addEventListener('change', function() {
-        chrome.send('getPublicSessionKeyboardLayouts', [
-            this.user.username,
-            languageSelect.options[languageSelect.selectedIndex].value]);
-      }.bind(this));
-
+      languageSelect.addEventListener(
+          'change',
+          this.getPublicSessionKeyboardLayouts_.bind(this));
       this.querySelector('.keyboard-select').tabIndex =
           UserPodTabOrder.POD_INPUT;
 
       var languageAndInput = this.querySelector('.language-and-input');
       languageAndInput.tabIndex = UserPodTabOrder.POD_INPUT;
       languageAndInput.addEventListener('click',
                                         this.transitionToAdvanced_.bind(this));
 
       this.enterButtonElement.addEventListener('click', (function(e) {
         this.enterButtonElement.disabled = true;
@@ skipping 20 matching lines @@
           languageSelect.appendChild(group);
         } else {
           group.appendChild(
               new Option(item.title, item.value, item.selected, item.selected));
         }
       }
 
       id = this.user.username + '-keyboard';
       this.querySelector('.keyboard-select-label').htmlFor = id;
       this.querySelector('.keyboard-select').setAttribute('id', id);
-      this.populateKeyboardSelect_(this.user.initialKeyboardLayouts);
+      this.populateKeyboardSelect_([this.user.initialKeyboardLayout]);
+      this.getPublicSessionKeyboardLayouts_();
     },
 
     /** @override **/
     update: function() {
       UserPod.prototype.update.call(this);
       this.querySelector('.expanded-pane-name').textContent =
           this.user_.displayName;
       this.querySelector('.info').textContent =
           loadTimeData.getStringF('publicAccountInfoFormat',
                                   this.user_.enterpriseDomain);
@@ skipping 91 matching lines @@
                                                       observer);
           pod.classList.remove('transitioning-to-advanced');
           pod.querySelector('.language-select').focus();
         });
         // Guard timer set to animation duration + 20ms.
         ensureTransitionEndEvent(languageAndInputSection, 380);
       }, 0);
     },
 
     /**
+     * Retrieves the list of keyboard layouts available for the currently
+     * selected locale.
+     */
+    getPublicSessionKeyboardLayouts_: function() {
+      var languageSelect = this.querySelector('.language-select');
+      chrome.send('getPublicSessionKeyboardLayouts', [
+                  this.user.username,
+                  languageSelect.options[languageSelect.selectedIndex].value]);
+     },
+
+    /**
      * Populates the keyboard layout "select" element with a list of layouts.
      * @param {!Object} list List of available keyboard layouts
      */
     populateKeyboardSelect_: function(list) {
       var keyboardSelect = this.querySelector('.keyboard-select');
       keyboardSelect.innerHTML = '';
       for (var i = 0; i < list.length; ++i) {
         var item = list[i];
         keyboardSelect.appendChild(
             new Option(item.title, item.value, item.selected, item.selected));
@@ skipping 1164 matching lines @@
       if (this.podsWithPendingImages_.length == 0) {
         this.classList.remove('images-loading');
       }
     }
   };
 
   return {
     PodRow: PodRow
   };
 });