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

masters/master.client.nacl.ports/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright (c) 2011 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 19 matching lines @@
 import master_site_config
 
 ActiveMaster = master_site_config.WebPorts
 
 GOOD_REVISIONS = 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)
 
 ####### CHANGESOURCES
 
 # the 'change_source' list tells the buildmaster how it should find out about
 # source code changes. Any class which implements IChangeSource can be added
 # to this list: there are several in buildbot/changes/*.py to choose from.
 
 git_url = 'https://chromium.googlesource.com/webports.git'
 poller = gitiles_poller.GitilesPoller(git_url)
 c['change_source'] = [poller]
@@ skipping 85 matching lines @@
 master_utils.AutoSetupMaster(c, ActiveMaster,
                              tagComparator=poller.comparator,
                              mail_notifier=True,
                              public_html='../master.chromium/public_html',
                              templates=['./templates',
                                         '../master.client.nacl/templates'])
 
 
 # Adjust the buildCaches to be 3x the number of slaves per builder.
 c['autoBuildCacheRatio'] = 3