Move common account picker/user pod js/css/html out of src/chrome

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 302 matching lines @@
      * Updates the list of available keyboard layouts for a public session pod.
      * @param {string} userID The user ID of the public session
      * @param {!Object} list List of available keyboard layouts
      */
     setPublicSessionKeyboardLayouts: function(userID, list) {
       $('pod-row').setPublicSessionKeyboardLayouts(userID, list);
     }
   };
 });