check_licenses, plan B:

masters/master.tryserver.chromium/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.
 
 # READ THIS:
 # See http://dev.chromium.org/developers/testing/chromium-build-infrastructure
 
 # These modules come from scripts, which must be in the PYTHONPATH.
@@ skipping 53 matching lines @@
 
 def CreateBuilder(platform, builder_name, target, webkit=False,
                   tests=None, options=None, mode=None, timeout=2400,
                   slavebuilddir=None, extra_gyp_defines=None,
                   gclient_env=None, sharding_supervisor=False,
                   unsharded_tests=None):
   """Generates and register a builder along with its slave(s)."""
   if platform not in ('win32', 'win64', 'linux', 'mac'):
     raise Exception(platform + ' is not a known os type')
   factory_properties = {
-      'non_default': ['pyauto_functional_tests', 'googleurl_unittests'],
+      'non_default': [
+          'check_licenses',
+          'pyauto_functional_tests',
+          'googleurl_unittests'
+      ],
   }
   if sharding_supervisor:
     factory_properties['sharding_supervisor'] = True
     factory_properties['unsharded_tests'] = unsharded_tests or []
   project = None
   if platform in ('win32', 'win64'):
     if webkit:
       factory = m_chromium_win_webkit
     else:
       factory = m_chromium_win
@@ skipping 909 matching lines @@
 ####### PROJECT IDENTITY
 
 # The 'projectURL' string will be used to provide a link
 # from buildbot HTML pages to your project's home page.
 c['projectURL'] = 'http://dev.chromium.org/developers/testing/try-server-usage'
 
 # Buildbot master url:
 c['buildbotURL'] = 'http://build.chromium.org/p/tryserver.chromium/'
 
 # vi: set ts=4 sts=2 sw=2 et: