Fixed button focusing in OOBE screens.

chrome/browser/resources/chromeos/login/oobe_screen_eula.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 Oobe eula screen implementation.
  */
 
 cr.define('oobe', function() {
   /**
@@ skipping 42 matching lines @@
       backButton.textContent = localStrings.getString('back');
       backButton.addEventListener('click', function(e) {
         chrome.send('eulaOnExit', [false, $('usage-stats').checked]);
         e.stopPropagation();
       });
       buttons.push(backButton);
 
       var acceptButton = this.ownerDocument.createElement('button');
       acceptButton.id = 'accept-button';
       acceptButton.textContent = localStrings.getString('acceptAgreement');
+      acceptButton.autofocus = true;
       acceptButton.addEventListener('click', function(e) {
         chrome.send('eulaOnExit', [true, $('usage-stats').checked]);
         e.stopPropagation();
       });
       buttons.push(acceptButton);
 
       return buttons;
     },
 
     /**
      * Updates localized content of the screen that is not updated via template.
      */
     updateLocalizedContent: function() {
       if ($('cros-eula-frame').src != '')
         $('cros-eula-frame').src = $('cros-eula-frame').src;
       if ($('oem-eula-frame').src != '')
         $('oem-eula-frame').src = $('oem-eula-frame').src;
     }
   };
 
   return {
     EulaScreen: EulaScreen
   };
 });