Don't access Port._filesystem directly (use Port.host.filesystem instead).

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/servers/server_base.py

 # Copyright (C) 2011 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 29 matching lines @@
 
 class ServerError(Exception):
     pass
 
 
 class ServerBase(object):
     """A skeleton class for starting and stopping servers used by the layout tests."""
 
     def __init__(self, port_obj, output_dir):
         self._port_obj = port_obj
-        self._executive = port_obj._executive
-        self._filesystem = port_obj._filesystem
+        self._executive = port_obj.host.executive
+        self._filesystem = port_obj.host.filesystem
         self._platform = port_obj.host.platform
         self._output_dir = output_dir
 
         # We need a non-checkout-dependent place to put lock files, etc. We
         # don't use the Python default on the Mac because it defaults to a
         # randomly-generated directory under /var/folders and no one would ever
         # look there.
         tmpdir = tempfile.gettempdir()
         if self._platform.is_mac():
             tmpdir = '/tmp'
@@ skipping 214 matching lines @@
             except IOError as e:
                 if e.errno in (errno.EALREADY, errno.EADDRINUSE):
                     raise ServerError('Port %d is already in use.' % port)
                 elif self._platform.is_win() and e.errno in (errno.WSAEACCES,):  # pylint: disable=E1101
                     raise ServerError('Port %d is already in use.' % port)
                 else:
                     raise
             finally:
                 s.close()
         _log.debug('all ports are available')