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

masters/master.client.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.
 
 # This is the buildmaster config file for the 'nacl' bot. It must
 # be installed as 'master.cfg' in your buildmaster's base directory
 # (although the filename can be changed with the --basedir option to
@@ skipping 33 matching lines @@
 
 # TODO(xusydoc): make Master subclasses handle these overrides automatically.
 config.Master.perf_base_url = ActiveMaster.perf_base_url
 
 # gatekeeper-ng is used; see build/scripts/slave/gatekeeper*.json
 
 # 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)
 
 master_poller = gitiles_poller.GitilesPoller(nacl_source_url)
 
 c['change_source'] = [master_poller]
 
 def F_NACL_RECIPE():
   return annotator_factory.AnnotatorFactory().BaseFactory(recipe='nacl',
       factory_properties = {'slavetype': 'BuilderTester'});
 
 
@@ skipping 179 matching lines @@
 # Adds common status and tools to this master.
 master_utils.AutoSetupMaster(
     c, ActiveMaster,
     public_html='../master.chromium/public_html',
     tagComparator=getattr(c['change_source'][0], 'comparator', None),
     templates=['./templates', '../master.chromium/templates'])
 
 
 # Adjust the buildCaches to be 3x the number of slaves per builder.
 c['autoBuildCacheRatio'] = 3