Docserver: Fix cron test broken by requirement of whats_new.json.

chrome/common/extensions/docs/server2/cron_servlet_test.py

 #!/usr/bin/env python
 # Copyright 2013 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.
 
 import unittest
 
 from appengine_wrappers import GetAppVersion
 from app_yaml_helper import AppYamlHelper
 from cron_servlet import CronServlet
@@ skipping 102 matching lines @@
             'extensions': {
               'storage.html': '<h1>storage.html</h1> contents'
             },
           },
           'json': {
             'chrome_sidenav.json': '{}',
             'content_providers.json': ReadFile(CONTENT_PROVIDERS),
             'manifest.json': '{}',
             'permissions.json': '{}',
             'strings.json': '{}',
+            'whats_new.json': '{}',
           },
         }
       }
     }
 
     updates = []
 
     def app_yaml_update(version):
       return MoveTo(SERVER2, {
         'app.yaml': AppYamlHelper.GenerateAppYaml(version)
@@ skipping 95 matching lines @@
     CronServlet(Request.ForTest('trunk'), delegate_for_test=delegate).Get()
     self.assertEqual(AppYamlHelper.GenerateAppYaml('2-1-0'),
                      file_systems[-1].ReadSingle(APP_YAML).Get())
     self.assertEqual('<h1>y</h1> u not update!',
                      file_systems[-1].ReadSingle(storage_html_path).Get())
     self.assertEqual('important content!',
                      file_systems[-1].ReadSingle(static_txt_path).Get())
 
 if __name__ == '__main__':
   unittest.main()