Break config_default into master_site_configs.

masters/master.tryserver.nacl/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # 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.
 
 # READ THIS:
 # See http://dev.chromium.org/developers/testing/chromium-build-infrastructure
 
 # These modules come from scripts, which must be in the PYTHONPATH.
 from master import master_utils
 from master import slaves_list
 from master.builders_pools import BuildersPools
 from master.factory import annotator_factory
 from master.factory import gyp_factory
 from master.factory import nacl_factory
 from master.try_job_http import TryJobHTTP
 from master.try_job_svn import TryJobSubversion
 
 from buildbot.scheduler import Triggerable
 
 import config
+import master_site_config
 
-ActiveMaster = config.Master.NativeClientTryServer
+ActiveMaster = master_site_config.NativeClientTryServer
 
 MAIL_NOTIFIER = True
 UPDATE_CODEREVIEW = 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 = {}
 
 config.DatabaseSetup(c, require_dbconfig=ActiveMaster.is_production_host)
 
@@ skipping 577 matching lines @@
                                            config.Master.GetBotPassword())
 
 
 ####### SCHEDULERS
 
 # Configure the Schedulers;
 # Main Tryscheduler for the try queue. groups is defined in the loop above.
 c['schedulers'] = []
 
 code_review_sites = {
-  'nacl': config.Master.NativeClientTryServer.code_review_site,
-  'nacl-toolchain': config.Master.NativeClientTryServer.code_review_site,
-  'gyp': config.Master.NativeClientTryServer.code_review_site,
+  'nacl': ActiveMaster.code_review_site,
+  'nacl-toolchain': ActiveMaster.code_review_site,
+  'gyp': ActiveMaster.code_review_site,
 }
 c['schedulers'].append(TryJobHTTP(
     name='try_job_http',
     port=ActiveMaster.try_job_port,
     code_review_sites=code_review_sites,
     pools=pools))
 
 if ActiveMaster.svn_url:
   c['schedulers'].append(TryJobSubversion(
       name='try_job_svn',
@@ skipping 53 matching lines @@
 
 
 ####### PROJECT IDENTITY
 
 # The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 c['projectURL'] = 'http://go/ChromeTryServer'
 
 # Buildbot master url:
 c['buildbotURL'] = 'http://build.chromium.org/p/tryserver.nacl/'