Added some documentation to the CrashTest class.

client/site_tests/logging_CrashSender/logging_CrashSender.py

 # Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import logging, os, re
 from autotest_lib.client.bin import utils
 from autotest_lib.client.common_lib import error
 from autotest_lib.client.cros import crash_test
 
 
@@ skipping 236 matching lines @@
 
     def _test_cron_runs(self):
         """Test sender runs successfully as part of the hourly cron job.
 
         Assuming we've run test_sender_simple which shows that a minidump
         gets removed as part of sending, we run the cron job (which is
         asynchronous) and wait for that file to be removed to just verify
         the job eventually runs the sender."""
         minidump = self._prepare_sender_one_crash(send_success=True,
                                                   reports_enabled=True,
-                                                  username='root',
                                                   report=None)
         if not os.path.exists(minidump):
             raise error.TestError('minidump not created')
         self._log_reader.set_start_by_current()
         utils.system(_CRASH_SENDER_CRON_PATH)
         self.wait_for_sender_completion()
         if os.path.exists(minidump):
             raise error.TestFail('minidump was not removed')
         crash_sender_log = self._log_reader.get_logs()
         logging.debug('Contents of crash sender log: ' + crash_sender_log)
@@ skipping 11 matching lines @@
             'sender_simple_kernel_crash',
             'sender_pausing',
             'sender_reports_disabled',
             'sender_rate_limiting',
             'sender_single_instance',
             'sender_send_fails',
             'sender_orphaned_files',
             'sender_incomplete_metadata',
             'sender_missing_payload',
             'cron_runs'])