Break config_default into master_site_configs.

scripts/master/factory/nacl_commands.py

Index: scripts/master/factory/nacl_commands.py
diff --git a/scripts/master/factory/nacl_commands.py b/scripts/master/factory/nacl_commands.py
index a779312891fc18372b32645b6a1d4687dc6e9af5..fec677c7ef1283fb6c02383ee28a7e4b71f7df11 100644
--- a/scripts/master/factory/nacl_commands.py
+++ b/scripts/master/factory/nacl_commands.py
@@ -16,16 +16,10 @@ from master import chromium_step
 from master.factory import commands
 from master.log_parser import process_log
 
-import config
-
 
 class NativeClientCommands(commands.FactoryCommands):
   """Encapsulates methods to add nacl commands to a buildbot factory."""
 
-  # pylint: disable=W0212
-  # (accessing protected member _NaClBase)
-  PERF_BASE_URL = config.Master._NaClBase.perf_base_url
-
   def __init__(self, factory=None, build_dir=None, target_platform=None):
     commands.FactoryCommands.__init__(self, factory, 'Release', build_dir,
                                       target_platform)