Extract common HTML from oobe.html/login.html.

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

 // Copyright (c) 2012 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 Display manager for WebUI OOBE and login.
  */
 
 // TODO(xiyuan): Find a better to share those constants.
 /** @const */ var SCREEN_OOBE_NETWORK = 'connect';
@@ skipping 259 matching lines @@
             if (defaultControl)
               defaultControl.focus();
           });
         } else {
           oldStep.classList.add('hidden');
           if (defaultControl)
             defaultControl.focus();
         }
       } else {
         // First screen on OOBE launch.
-        if (innerContainer.classList.contains('down')) {
+        if (document.body.classList.contains('oobe-display') &&
+            innerContainer.classList.contains('down')) {
           innerContainer.classList.remove('down');
           innerContainer.addEventListener(
               'webkitTransitionEnd', function f(e) {
                 innerContainer.removeEventListener('webkitTransitionEnd', f);
                 $('progress-dots').classList.remove('down');
                 chrome.send('loginVisible', ['oobe']);
                 if (defaultControl)
                   defaultControl.focus();
               });
         } else {
@@ skipping 385 matching lines @@
    */
   DisplayManager.clearUserPodPassword = function() {
     $('pod-row').clearFocusedPod();
   };
 
   // Export
   return {
     DisplayManager: DisplayManager
   };
 });