Break config_default into master_site_configs.

masters/master.client.pagespeed/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.
 
 from buildbot.changes import svnpoller
 from buildbot.scheduler import Scheduler
 
 from master import build_utils
 from master import master_utils
 from master import slaves_list
 from master.factory import pagespeed_factory
 
 import config
+import master_site_config
 
-ActiveMaster = config.Master.PageSpeed
+ActiveMaster = master_site_config.PageSpeed
 
 TREE_GATE_KEEPER = ActiveMaster.is_production_host
 GOOD_REVISIONS = ActiveMaster.is_production_host
 
 # This is the dictionary that the buildmaster pays attention to. We also use
 # a shorter alias to save typing.
 c = BuildmasterConfig = {}
 
 
 ####### DATABASE
@@ skipping 338 matching lines @@
     good_revs[builder['name']] = categories_steps[builder['category']]
   c['status'].append(goodrevisions.GoodRevisions(
       good_revision_steps=good_revs,
       store_revisions_url=ActiveMaster.store_revisions_url,
       use_getname=True))
 
 ####### PROJECT IDENTITY
 
 # Buildbot master url:
 c['buildbotURL'] = 'http://build.chromium.org/p/client.pagespeed/'