[Android] Allow gtests to pull app data off the device before clearing it.

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 197 matching lines @@
                      default='',
                      help='Additional arguments to pass to the test.')
   group.add_argument('-t', dest='timeout', type=int, default=60,
                      help='Timeout to wait for each test '
                           '(default: %(default)s).')
   group.add_argument('--isolate_file_path',
                      '--isolate-file-path',
                      dest='isolate_file_path',
                      help='.isolate file path to override the default '
                           'path')
+  group.add_argument('--app-data-file', action='append', dest='app_data_files',
+                     help='A file path relative to the app data directory '
+                          'that should be saved to the host.')
+  group.add_argument('--app-data-file-dir',
+                     help='Host directory to which app data files will be'
+                          ' saved. Used with --app-data-file.')
 
   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 405 matching lines @@
   for suite_name in args.suite_name:
     # TODO(jbudorick): Either deprecate multi-suite or move its handling down
     # into the gtest code.
     gtest_options = gtest_test_options.GTestOptions(
         args.tool,
         args.test_filter,
         args.run_disabled,
         args.test_arguments,
         args.timeout,
         args.isolate_file_path,
-        suite_name)
+        suite_name,
+        args.app_data_files,
+        args.app_data_file_dir)
     runner_factory, tests = gtest_setup.Setup(gtest_options, devices)
 
     results, test_exit_code = test_dispatcher.RunTests(
         tests, runner_factory, devices, shard=True, test_timeout=None,
         num_retries=args.num_retries)
 
     if test_exit_code and exit_code != constants.ERROR_EXIT_CODE:
       exit_code = test_exit_code
 
     report_results.LogFull(
@@ skipping 373 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())