Make `git cl try` to the same as hitting cq (except for presubmit).

PRESUBMIT.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.
 
 """Top-level presubmit script for Chromium.
 
 See http://dev.chromium.org/developers/how-tos/depottools/presubmit-scripts
 for more details about the presubmit API built into depot_tools.
 """
 
@@ skipping 1696 matching lines @@
       input_api, output_api))
   results.extend(input_api.canned_checks.CheckChangeHasDescription(
       input_api, output_api))
   return results
 
 
 def GetPreferredTryMasters(project, change):
   import re
   files = change.LocalPaths()
 
-  if not files or all(re.search(r'[\\\/]OWNERS$', f) for f in files):
-    return {}
-
-  if all(re.search(r'\.(m|mm)$|(^|[\\\/_])mac[\\\/_.]', f) for f in files):
-    return GetDefaultTryConfigs([
-        'mac_chromium_compile_dbg_ng',
-        'mac_chromium_rel_ng',
-    ])
-  if all(re.search('(^|[/_])win[/_.]', f) for f in files):
-    return GetDefaultTryConfigs([
-        'win8_chromium_rel',
-        'win_chromium_rel_ng',
-        'win_chromium_x64_rel_ng',
-    ])
-  if all(re.search(r'(^|[\\\/_])android[\\\/_.]', f) and
-         not re.search(r'(^|[\\\/_])devtools[\\\/_.]', f) for f in files):
-    return GetDefaultTryConfigs([
-        'android_aosp',
-        'android_rel_tests_recipe',
-    ])
-  if all(re.search(r'[\\\/_]ios[\\\/_.]', f) for f in files):
-    return GetDefaultTryConfigs(['ios_rel_device', 'ios_dbg_simulator'])
-
   import os
   import json
   with open(os.path.join(
       change.RepositoryRoot(), 'testing', 'commit_queue', 'config.json')) as f:
     cq_config = json.load(f)
     cq_trybots = cq_config.get('trybots', {})
     builders = cq_trybots.get('launched', {})
     for master, master_config in cq_trybots.get('triggered', {}).iteritems():
       for triggered_bot in master_config:
         builders.get(master, {}).pop(triggered_bot, None)
 
     # Explicitly iterate over copies of dicts since we mutate them.
     for master in builders.keys():
       for builder in builders[master].keys():
         # 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.
         if 'presubmit' in builder:
           builders[master].pop(builder)
 
-  # Match things like path/aura/file.cc and path/file_aura.cc.
-  # Same for chromeos.
-  if any(re.search(r'[\\\/_](aura|chromeos)', f) for f in files):
-    tryserver_linux = builders.setdefault('tryserver.chromium.linux', {})
-    tryserver_linux['linux_chromium_chromeos_asan_rel_ng'] = ['defaulttests']
-
   return builders