Add OSX tests to run on Swarming.

projects.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.
 """Define the supported projects."""
 
 import json
 import logging
 import os
 import re
 import sys
@@ skipping 398 matching lines @@
     )
 
     # pylint: disable=W0612
     swarm_test_map = dict(
       (test, test + '_swarm') for test in swarm_enabled_tests)
 
     # Commenting out the items below will make the CQ not use swarm for its
     # execution. Uncomment to make the CQ use Swarming again.
     swarm_enabled_builders_and_tests = {
       ('linux_rel', 'linux_swarm_triggered'): swarm_test_map,
-      # ('mac_rel', 'mac_swarm_triggered'): swarm_test_map,
+      ('mac_rel', 'mac_swarm_triggered'): swarm_test_map,
       # ('win_rel', 'win_swarm_triggered'): swarm_test_map,
     }
 
     step_verifiers += [
       try_job_steps.TryJobSteps(
           builder_name=b, prereq_builder=prereq_builder,
           prereq_tests=prereq_tests, steps=s)
       for b, s in builders_and_tests.iteritems()
       if b not in swarm_enabled_builders_and_tests
     ] + [
@@ skipping 312 matching lines @@
   """List the projects that can be managed by the commit queue."""
   return sorted(
       x[5:] for x in dir(sys.modules[__name__]) if x.startswith('_gen_'))
 
 
 def load_project(project, user, root_dir, rietveld_obj, no_try):
   """Loads the specified project."""
   assert os.path.isabs(root_dir)
   return getattr(sys.modules[__name__], '_gen_' + project)(
       user, root_dir, rietveld_obj, no_try)