Break config_default into master_site_configs.

masters/master.client.skia/master.cfg

 # 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.
 
 # This module comes from $(TOPLEVEL_DIR)/third_party/buildbot_<VERSION> ,
 # which must be in the PYTHONPATH.
 from buildbot.status import mail
 
 # These modules come from $(TOPLEVEL_DIR)/scripts ,
 # which must be in the PYTHONPATH.
 from master import master_utils
 from master import slaves_list
 
 # This module comes from $(TOPLEVEL_DIR)/site_config ,
 # which must be in the PYTHONPATH.
 import config
+import master_site_config
 
 # These modules come from the local directory.
 import master_builders_cfg
 import master_source_cfg
 
-ActiveMaster = config.Master.Skia
+ActiveMaster = master_site_config.Skia
 
 c = BuildmasterConfig = {}
 c['change_source'] = []
 c['schedulers'] = []
 c['builders'] = []
 c['status'] = []
 
 master_source_cfg.Update(config, ActiveMaster, c)
 master_builders_cfg.Update(config, ActiveMaster, c)
 
@@ skipping 22 matching lines @@
 if ActiveMaster.is_production_host:
   mail_notifier = mail.MailNotifier(
       fromaddr=ActiveMaster.from_address,
       sendToInterestedUsers=True,
       extraRecipients=['skia-commit@googlegroups.com'],
       mode='change',
       relayhost=config.Master.smtp,
       lookup=master_utils.FilterDomain(
           permitted_domains=config.Master.permitted_domains))
   c['status'].append(mail_notifier)