In the logtesting support module, fix the setting of logging level.

third_party/WebKit/Tools/Scripts/webkitpy/common/system/logtesting.py

 # Copyright (C) 2010 Chris Jerdonek (cjerdonek@webkit.org)
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions
 # are met:
 # 1.  Redistributions of source code must retain the above copyright
 #     notice, this list of conditions and the following disclaimer.
 # 2.  Redistributions in binary form must reproduce the above copyright
 #     notice, this list of conditions and the following disclaimer in the
 #     documentation and/or other materials provided with the distribution.
@@ skipping 132 matching lines @@
         handler.setLevel(logging_level)
         formatter = logging.Formatter("%(levelname)s: %(message)s")
         handler.setFormatter(formatter)
 
         # Notice that we only change the root logger by adding a handler
         # to it.  In particular, we do not reset its level using
         # logger.setLevel().  This ensures that we have not interfered
         # with how the code being tested may have configured the root
         # logger.
         logger = LogTesting._getLogger()
+        logger.setLevel(logging_level)
         logger.addHandler(handler)
 
         return LogTesting(stream, handler)
 
     def tearDown(self):
         """Resets logging."""
         logger = LogTesting._getLogger()
         logger.removeHandler(self._handler)
 
     def messages(self):
@@ skipping 69 matching lines @@
     # See the code comments preceding LogTesting.assertMessages() for
     # an explanation of why we clear the array of messages after
     # asserting its contents.
     def assertLog(self, messages):
         """Assert the current array of log messages, and clear its contents.
 
         Args:
           messages: A list of log message strings.
         """
         self._log.assertMessages(messages)