Add a MailNotifier that notifies chrome-security-sheriff@grotations.appspotmail.com for LKGR builds.

masters/master.chromium.lkgr/master.cfg

 # 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.
 
+from buildbot.status.mail import MailNotifier
+
 from master import master_utils
 from master import slaves_list
 
 import config
 import master_site_config
 
 ActiveMaster = master_site_config.ChromiumLKGR
 
 c = BuildmasterConfig = {}
 c['change_source'] = []
@@ skipping 24 matching lines @@
 c['slaves'] = master_utils.AutoSetupSlaves(c['builders'],
                                            config.Master.GetBotPassword())
 master_utils.VerifySetup(c, slaves)
 
 # Adds common status and tools to this master.
 master_utils.AutoSetupMaster(c, ActiveMaster,
     public_html='../master.chromium/public_html',
     templates=['../master.chromium/templates'],
     tagComparator=c['change_source'][0].comparator,
     enable_http_status_push=ActiveMaster.is_production_host)
+
+c['status'].append(MailNotifier(
+    fromaddr=ActiveMaster.from_address,
+    mode='problem',
+    relayhost=config.Master.smtp,
+    subject='LKGR build failure on %(builder)s',
+    extraRecipients=['chrome-security-sheriff@grotations.appspotmail.com'],
+    sendToInterestedUsers=False))