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

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/android.py

 # Copyright (C) 2012 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 1272 matching lines @@
 
         self._clean_up_cmd_line()
 
     def _pull_crash_dumps_from_device(self):
         result = []
         if not self._android_commands.file_exists(self._driver_details.device_crash_dumps_directory()):
             return result
         dumps = self._android_commands.run(['shell', 'ls', self._driver_details.device_crash_dumps_directory()])
         for dump in dumps.splitlines():
             device_dump = '%s/%s' % (self._driver_details.device_crash_dumps_directory(), dump)
-            local_dump = self._port._filesystem.join(self._port._dump_reader.crash_dumps_directory(), dump)
+            local_dump = self._port.host.filesystem.join(
+                self._port._dump_reader.crash_dumps_directory(), dump)  # pylint: disable=protected-access
 
             # FIXME: crbug.com/321489. Figure out why these commands would fail ...
             err = self._android_commands.run(['shell', 'chmod', '777', device_dump])
             if not err:
                 self._android_commands.pull(device_dump, local_dump)
             if not err:
                 self._android_commands.run(['shell', 'rm', '-f', device_dump])
 
-            if self._port._filesystem.exists(local_dump):
+            if self._port.host.filesystem.exists(local_dump):
                 result.append(local_dump)
         return result
 
     def _clean_up_cmd_line(self):
         if not self._created_cmd_line:
             return
 
         cmd_line_file_path = self._driver_details.command_line_file()
         original_cmd_line_file_path = cmd_line_file_path + '.orig'
         if self._android_commands.file_exists(original_cmd_line_file_path):
             self._android_commands.run(['shell', 'mv', original_cmd_line_file_path, cmd_line_file_path])
         elif self._android_commands.file_exists(cmd_line_file_path):
             self._android_commands.run(['shell', 'rm', cmd_line_file_path])
         self._created_cmd_line = False
 
     def _command_from_driver_input(self, driver_input):
         command = super(ChromiumAndroidDriver, self)._command_from_driver_input(driver_input)
         if command.startswith('/'):
-            fs = self._port._filesystem
+            fs = self._port.host.filesystem
             # FIXME: what happens if command lies outside of the layout_tests_dir on the host?
             relative_test_filename = fs.relpath(command, fs.dirname(self._port.layout_tests_dir()))
             command = DEVICE_WEBKIT_BASE_DIR + relative_test_filename
         return command
 
     def _read_prompt(self, deadline):
         last_char = ''
         while True:
             current_char = self._server_process.read_stdout(deadline, 1)
             if current_char == ' ':
                 if last_char in ('#', '$'):
                     return
             last_char = current_char