Please don't break the presubmit check.

site_config/config_default.py

 # Copyright (c) 2011 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.
 
 """Seeds a number of variables defined in chromium_config.py.
 
 The recommended way is to fork this file and use a custom DEPS forked from
 config/XXX/DEPS with the right configuration data."""
 
 
@@ skipping 10 matching lines @@
   webkit_root_url = 'http://svn.webkit.org/repository/webkit'
 
   # Other non-redistributable repositories.
   repo_root_internal = None
   trunk_internal_url = None
   trunk_internal_url_src = None
   gears_url_internal = None
   o3d_url_internal = None
   nacl_trunk_url_internal = None
   nacl_url_internal = None
+  syzygy_url = None
 
   # Actually for Chromium OS slaves.
   chromeos_url = git_server_url + '/chromiumos.git'
   chromeos_internal_url = None
 
   # Please change this accordingly.
   master_domain = 'example.com'
   permitted_domains = ('example.com',)
 
   # Your smtp server to enable mail notifications.
@@ skipping 225 matching lines @@
   # Web server base path.
   www_dir_base = "\\\\" + archive_host + "\\www\\"
 
   @staticmethod
   def Internal():
     pass
 
 
 class Distributed(object):
   """Not much to describe."""