Rework how bots get the version of Blink.

scripts/master/factory/gclient_factory.py

 # 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.
 
 """Utility classes to generate and manage a BuildFactory to be passed to a
 builder dictionary as the 'factory' member, for each builder in c['builders'].
 
 Specifically creates a base BuildFactory that will execute a gclient checkout
 first."""
 
@@ skipping 283 matching lines @@
     # Get variables needed for the update.
     env = factory_properties.get('gclient_env', {})
     timeout = factory_properties.get('gclient_timeout')
 
     no_gclient_branch = factory_properties.get('no_gclient_branch', False)
     no_gclient_revision = factory_properties.get('no_gclient_revision', False)
 
     gclient_transitive = factory_properties.get('gclient_transitive', False)
     primary_repo = factory_properties.get('primary_repo', '')
     gclient_jobs = factory_properties.get('gclient_jobs')
+    blink_config = factory_properties.get('blink_config')
 
     # Add the update step.
     factory_cmd_obj.AddUpdateStep(
         gclient_spec,
         env=env,
         timeout=timeout,
         sudo_for_remove=sudo_for_remove,
         gclient_deps=gclient_deps,
         gclient_nohooks=True,
         no_gclient_branch=no_gclient_branch,
         no_gclient_revision=no_gclient_revision,
         gclient_transitive=gclient_transitive,
         primary_repo=primary_repo,
-        gclient_jobs=gclient_jobs)
+        gclient_jobs=gclient_jobs,
+        blink_config=blink_config)
 
     if slave_type in ('AnnotatedTrybot', 'CrosTrybot', 'Trybot', 'Bisect'):
       factory_cmd_obj.AddApplyIssueStep(
           timeout=timeout,
           server=config.Master.TryServer.code_review_site)
 
     if not self._nohooks_on_update:
       factory_cmd_obj.AddRunHooksStep(env=env, timeout=timeout)