Access environment variables through Host object instead of directly.

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

 # Copyright (C) 2010 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 143 matching lines @@
         if self._crash_service:
             self._crash_service.stop()
             self._crash_service = None
 
     def setup_environ_for_server(self):
         env = super(WinPort, self).setup_environ_for_server()
 
         # FIXME: This is a temporary hack to get the cr-win bot online until
         # someone from the cr-win port can take a look.
         apache_envvars = ['SYSTEMDRIVE', 'SYSTEMROOT', 'TEMP', 'TMP']
-        for key, value in os.environ.items():
+        for key, value in self.host.environ.copy().items():
             if key not in env and key in apache_envvars:
                 env[key] = value
 
         # Put the cygwin directory first in the path to find cygwin1.dll.
         env["PATH"] = "%s;%s" % (self.path_from_chromium_base("third_party", "cygwin", "bin"), env["PATH"])
         # Configure the cygwin directory so that pywebsocket finds proper
         # python executable to run cgi program.
         env["CYGWIN_PATH"] = self.path_from_chromium_base("third_party", "cygwin", "bin")
         if self.get_option('register_cygwin'):
             setup_mount = self.path_from_chromium_base("third_party", "cygwin", "setup_mount.bat")
@@ skipping 66 matching lines @@
         return result
 
     def look_for_new_crash_logs(self, crashed_processes, start_time):
         if self.get_option('disable_breakpad'):
             return None
         return self._dump_reader.look_for_new_crash_logs(crashed_processes, start_time)
 
     def clobber_old_port_specific_results(self):
         if not self.get_option('disable_breakpad'):
             self._dump_reader.clobber_old_results()