Let Blink try jobs use a Blink-specific LKGR

masters/master.tryserver.chromium/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.
 
 # READ THIS:
 # See http://dev.chromium.org/developers/testing/chromium-build-infrastructure
 
 from buildbot.scheduler import Triggerable
@@ skipping 1966 matching lines @@
 # Make sure everything works together.
 master_utils.VerifySetup(c, slaves)
 
 
 ####### SCHEDULERS
 
 # Configure the Schedulers;
 # Main Tryscheduler for the try queue. groups is defined in the loop above.
 c['schedulers'] = []
 
-last_good_urls = {'chrome': ActiveMaster.last_good_url}
+last_good_urls = {'chrome': ActiveMaster.last_good_url,
+                  'blink': ActiveMaster.last_good_blink_url}
 code_review_sites = {'chrome': ActiveMaster.code_review_site}
 
 c['schedulers'].append(TryJobHTTP(
       name='try_job_http',
       port=ActiveMaster.try_job_port,
       last_good_urls=last_good_urls,
       code_review_sites=code_review_sites,
       pools=pools))
 
 if ActiveMaster.is_production_host:
@@ skipping 102 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: