Break config_default into master_site_configs.

masters/master.chromium.webkit/master_linux_webkit_latest_cfg.py

 # 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.
 
 from master import master_config
 from master.factory import chromium_factory
 
-import config
+import master_site_config
 
-ActiveMaster = config.Master.ChromiumWebkit
+ActiveMaster = master_site_config.ChromiumWebkit
 
 defaults = {}
 
 helper = master_config.Helper(defaults)
 B = helper.Builder
 F = helper.Factory
 
 def linux():
   return chromium_factory.ChromiumFactory('src/out', 'linux2')
 
@@ skipping 87 matching lines @@
     factory_properties={
         'archive_webkit_results': ActiveMaster.is_production_host,
         'generate_gtest_json': True,
         'test_results_server': 'test-results.appspot.com',
         'gclient_env': { 'GYP_GENERATORS': 'ninja' },
         'blink_config': 'blink',
     }))
 
 def Update(_config, _active_master, c):
   return helper.Update(c)