Don't require a .dbconfig file on any masters.

masters/master.tryserver.chromium.perf/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 # Copyright 2014 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
 
 import socket
@@ skipping 13 matching lines @@
 ActiveMaster = master_site_config.ChromiumPerfTryServer
 
 
 MAIL_NOTIFIER = ActiveMaster.is_production_host
 LISTEN_TO_SVN = ActiveMaster.svn_url and 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)
+config.DatabaseSetup(c)
 
 c['change_source'] = []
 
 # Avoid merging requests.
 c['mergeRequests'] = False
 
 c['builders'] = []
 
 _category_index = enumerate(
     ('builders', 'android', 'webview', 'windows', 'mac', 'linux', 'cq', 'fyi'))
@@ skipping 168 matching lines @@
 # Must be at least 2x the number of slaves.
 c['eventHorizon'] = 200
 c['logCompressionLimit'] = False
 
 # Adjust the buildCaches to be 3x the number of slaves per builder.
 c['autoBuildCacheRatio'] = 3
 
 c['projectURL'] = 'http://dev.chromium.org/developers/testing/try-server-usage'
 
 # vi: set ts=4 sts=2 sw=2 et: