Remove all support for cygwin in run-webkit-tests.

third_party/WebKit/Tools/Scripts/webkitpy/layout_tests/port/driver.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 401 matching lines @@
 
     def _command_from_driver_input(self, driver_input):
         # FIXME: performance tests pass in full URLs instead of test names.
         if driver_input.test_name.startswith(
                 'http://') or driver_input.test_name.startswith('https://') or driver_input.test_name == ('about:blank'):
             command = driver_input.test_name
         elif self.is_http_test(driver_input.test_name) or self._port.should_use_wptserve(driver_input.test_name):
             command = self.test_to_uri(driver_input.test_name)
         else:
             command = self._port.abspath_for_test(driver_input.test_name)
-            if sys.platform == 'cygwin':
-                command = path.cygpath(command)
 
         assert not driver_input.image_hash or driver_input.should_run_pixel_test
 
         # ' is the separator between arguments.
         if self._port.supports_per_test_timeout():
             command += "'--timeout'%s" % driver_input.timeout
         if driver_input.should_run_pixel_test:
             command += "'--pixel-test"
         if driver_input.image_hash:
             command += "'" + driver_input.image_hash
@@ skipping 112 matching lines @@
         self.decoded_content = None
         self.malloc = None
         self.js_heap = None
         self.stdin_path = None
 
     def decode_content(self):
         if self.encoding == 'base64' and self.content is not None:
             self.decoded_content = base64.b64decode(self.content)
         else:
             self.decoded_content = self.content