Allow a single trybot to mirror multiple waterfall bots.

scripts/slave/recipe_modules/auto_bisect/local_bisect.py

 # 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 base64
 import collections
 import json
 
 
 def perform_bisect(api):  # pragma: no cover
@@ skipping 17 matching lines @@
     bisector.bisect_over = True
   bisector.print_result_debug_info()
   bisector.print_result()
 
 
 def _ensure_checkout(api):  # pragma: no cover
   mastername = api.m.properties.get('mastername')
   buildername = api.m.properties.get('buildername')
   # TODO(akuegel): Explicitly load the configs for the builders and don't rely
   # on builders.py in chromium_tests recipe module.
-  api.m.chromium_tests.configure_build(mastername, buildername)
-  api.m.chromium_tests.prepare_checkout(mastername, buildername)
+  bot_desc = api.m.chromium_tests.create_bot_desc(mastername, buildername)
+  api.m.chromium_tests.configure_build(bot_desc)
+  api.m.chromium_tests.prepare_checkout(bot_desc)
 
 
 def _gather_reference_range(api, bisector):  # pragma: no cover
   bisector.good_rev.start_job()
   bisector.bad_rev.start_job()
   bisector.wait_for_all([bisector.good_rev, bisector.bad_rev])
   if bisector.good_rev.failed:
     bisector.surface_result('REF_RANGE_FAIL')
     api.m.halt('Testing the "good" revision failed')
     bisector.failed = True
@@ skipping 58 matching lines @@
       revisions_to_check.remove(completed_revision)
     else:
       bisector.api.m.step.active_result.presentation.status = (
           bisector.api.m.step.WARNING)
       bisector.api.m.step.active_result.presentation.logs['WARNING'] = (
           ['Tried to remove revision not in list'])
     if not (completed_revision.aborted or completed_revision.failed):
       completed_revisions.append(completed_revision)
       bisector.abort_unnecessary_jobs()
   return completed_revisions