Android gtest runner: Only query device for test list when necessary (take 2)

build/android/test_runner.py

 #!/usr/bin/env python
 #
 # Copyright 2013 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.
 
 """Runs all types of tests from one unified interface."""
 
 import argparse
 import collections
@@ skipping 236 matching lines @@
   group.add_argument('--delete-stale-data', dest='delete_stale_data',
                      action='store_true',
                      help='Delete stale test data on the device.')
   group.add_argument('--repeat', '--gtest_repeat', '--gtest-repeat',
                      dest='repeat', type=int, default=0,
                      help='Number of times to repeat the specified set of '
                           'tests.')
   group.add_argument('--break-on-failure', '--break_on_failure',
                      dest='break_on_failure', action='store_true',
                      help='Whether to break on failure.')
+  group.add_argument('--extract-test-list-from-filter',
+                     action='store_true',
+                     help='When a test filter is specified, and the list of '
+                     'tests can be determined from it, skip querying the '

[jbudorick, 2016/02/03 14:25:17]

nit: indent to opening '

[agrieve, 2016/02/03 16:02:02]

Done.

+                     'device for the list of all tests. Speeds up local '
+                     'development, but is not safe to use on bots ('
+                     'http://crbug.com/549214')
 
   filter_group = group.add_mutually_exclusive_group()
   filter_group.add_argument('-f', '--gtest_filter', '--gtest-filter',
                             dest='test_filter',
                             help='googletest-style filter string.')
   filter_group.add_argument('--gtest-filter-file', dest='test_filter_file',
                             help='Path to file that contains googletest-style '
                                   'filter strings. (Lines will be joined with '
                                   '":" to create a single filter string.)')
 
@@ skipping 819 matching lines @@
     if e.is_infra_error:
       return constants.INFRA_EXIT_CODE
     return constants.ERROR_EXIT_CODE
   except: # pylint: disable=W0702
     logging.exception('Unrecognized error occurred.')
     return constants.ERROR_EXIT_CODE
 
 
 if __name__ == '__main__':
   sys.exit(main())