Fix PRESUBMIT.py after disabling CQ.

PRESUBMIT.py

 # Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 
 import json
 import os
@@ skipping 320 matching lines @@
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckTreeIsOpen(
       input_api, output_api,
       json_url='http://webrtc-status.appspot.com/current?format=json'))
   return results
 
 
 # pylint: disable=W0613
 def GetPreferredTryMasters(project, change):
   cq_config_path = os.path.join(
-      change.RepositoryRoot(), 'infra', 'config', 'cq.cfg')
+      change.RepositoryRoot(), 'infra', 'config', 'cq_disabled.cfg')
   # commit_queue.py below is a script in depot_tools directory, which has a
   # 'builders' command to retrieve a list of CQ builders from the CQ config.
   is_win = platform.system() == 'Windows'
   masters = json.loads(subprocess.check_output(
       ['commit_queue', 'builders', cq_config_path], shell=is_win))
 
   try_config = {}
   for master in masters:
     try_config.setdefault(master, {})
     for builder in masters[master]:
       if 'presubmit' in builder:
         # Do not trigger presubmit builders, since they're likely to fail
         # (e.g. OWNERS checks before finished code review), and we're running
         # local presubmit anyway.
         pass
       else:
         try_config[master][builder] = ['defaulttests']
 
   return try_config