Break config_default into master_site_configs.

masters/master.tryserver.libyuv/master_site_config.py

Index: masters/master.tryserver.libyuv/master_site_config.py
diff --git a/masters/master.tryserver.libyuv/master_site_config.py b/masters/master.tryserver.libyuv/master_site_config.py
index ccbb71770af8b6012ffb0cb769d1d84998f8d714..dd6cb7937c2c4e605b9b15da2bea35d3493a73a4 100644
--- a/masters/master.tryserver.libyuv/master_site_config.py
+++ b/masters/master.tryserver.libyuv/master_site_config.py
@@ -4,10 +4,9 @@
 
 """ActiveMaster definition."""
 
-import socket
+from config import Master
 
-
-class LibyuvTryServer(object):
+class LibyuvTryServer(Master.Master4):
   project_name = 'Libyuv Try Server'
   master_port = 8006
   slave_port = 8106
@@ -15,6 +14,4 @@ class LibyuvTryServer(object):
   try_job_port = 8306
   from_address = 'libyuv-cb-watchlist@google.com'
   code_review_site = 'http://review.webrtc.org'
-  master_host = 'master4.golo.chromium.org'
-  is_production_host = socket.getfqdn() == master_host
   svn_url = 'svn://svn.chromium.org/chrome-try/try-libyuv'