Added browser and OS credits link to EULA page.

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.
  */
 
 login.createScreen('EulaScreen', 'eula', function() {
   return {
     /** @override */
     decorate: function() {
+      $('eula-chrome-credits-link').hidden = true;
+      $('eula-chromeos-credits-link').hidden = true;
       $('stats-help-link').addEventListener('click', function(event) {
         chrome.send('eulaOnLearnMore');
       });
       $('installation-settings-link').addEventListener(
           'click', function(event) {
             chrome.send('eulaOnInstallationSettingsPopupOpened');
             $('popup-overlay').hidden = false;
             $('installation-settings-ok-button').focus();
           });
       $('installation-settings-ok-button').addEventListener(
@@ skipping 76 matching lines @@
     },
 
     /**
      * Returns a control which should receive an initial focus.
      */
     get defaultControl() {
       return $('accept-button').disabled ? $('back-button') :
                                            $('accept-button');
     },
 
+    enableKeyboardFlow: function() {
+      $('eula-chrome-credits-link').hidden = false;
+      $('eula-chromeos-credits-link').hidden = false;
+      $('eula-chrome-credits-link').addEventListener('click',
+        function(event) {
+          chrome.send('eulaOnChromeCredits');
+      });

[xiyuan, 2014/05/13 20:45:53]

nit: indent two more spaces to align with "function" in line 115.

[zel, 2014/05/13 21:02:23]

Done.

+      $('eula-chromeos-credits-link').addEventListener('click',
+        function(event) {
+          chrome.send('eulaOnChromeOSCredits');
+      });

[xiyuan, 2014/05/13 20:45:53]

ditto.

[zel, 2014/05/13 21:02:23]

Done.

+    },
+
     /**
      * Updates localized content of the screen that is not updated via template.
      */
     updateLocalizedContent: function() {
       // Force iframes to refresh. It's only available method because we have
       // no access to iframe.contentWindow.
       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;
       }
     }
   };
 });