Added the --screenshot option.

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 319 matching lines @@
       '-A', '--annotation', dest='annotation_str',
       help=('Comma-separated list of annotations. Run only tests with any of '
             'the given annotations. An annotation can be either a key or a '
             'key-values pair. A test that has no annotation is considered '
             '"SmallTest".'))
   argument_group.add_argument(
       '-E', '--exclude-annotation', dest='exclude_annotation_str',
       help=('Comma-separated list of annotations. Exclude tests with these '
             'annotations.'))
   argument_group.add_argument(
-      '--screenshot', dest='screenshot_failures', action='store_true',
+      '--screenshot-directory', dest='screenshot_dir',
       help='Capture screenshots of test failures')
   argument_group.add_argument(
       '--save-perf-json', action='store_true',
       help='Saves the JSON file for each UI Perf test.')
   argument_group.add_argument(
       '--official-build', action='store_true', help='Run official build tests.')
   argument_group.add_argument(
       '--test_data', '--test-data', action='append', default=[],
       help=('Each instance defines a directory of test data that should be '
             'copied to the target(s) before running the tests. The argument '
@@ skipping 612 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())