Add sync_submodules builders on master.chromium.infra.

masters/master.chromium.infra.cron/master.cfg

 # -*- python -*-
 # ex: set syntax=python:
 
 # Copyright 2015 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.
 
 import config
 import master_site_config
 
@@ skipping 37 matching lines @@
 
 ####### DATABASE
 
 config.DatabaseSetup(c, require_dbconfig=ActiveMaster.is_production_host)
 
 
 ####### CHANGE SOURCES
 INFRA_REPO_URL = 'https://chromium.googlesource.com/infra/infra'
 
 c['change_source'].extend([
-  gitiles_poller.GitilesPoller(
-    repo_url='https://chromium.googlesource.com/infra/infra',
-    project='infra',
-    branches=['master'],
-    pollInterval=10,
-    revlinktmpl=INFRA_REPO_URL+'/+/%s'),
+  gitiles_poller.GitilesPoller('https://chromium.googlesource.com/infra/infra'),
 ])
 
 ####### BUILDERS
 
 c['builders'].extend([
   {
     'name': 'gnumbd',
     'factory': f_annotations.BaseFactory(
         'infra/gnumbd',
         {'target_repo': 'https://chromium.googlesource.com/chromium/src'}),
@@ skipping 187 matching lines @@
       sendToInterestedUsers=False,
       extraRecipients=['blink-infra+alerts@google.com',
                        'chrome-troopers+alerts@google.com'],
   ),
 ])
 
 ####### PROJECT IDENTITY
 
 c['projectName'] = ActiveMaster.project_name
 c['buildbotURL'] = ActiveMaster.buildbot_url