luci-py: Making __file__ usage unicode safe.

client/tests/net_test.py

 #!/usr/bin/env python
 # Copyright 2013 The LUCI Authors. All rights reserved.
 # Use of this source code is governed under the Apache License, Version 2.0
 # that can be found in the LICENSE file.
 
 # pylint: disable=R0201,W0613
 
 import StringIO
 import __builtin__
 import contextlib
 import logging
 import math
 import os
 import sys
 import unittest
 
-ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(__file__)))
+ROOT_DIR = os.path.dirname(os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding()))))
 sys.path.insert(0, ROOT_DIR)
 sys.path.insert(0, os.path.join(ROOT_DIR, 'third_party'))
 
 from depot_tools import auto_stub
 from utils import net
 import net_utils
 
 
 class RetryLoopMockedTest(auto_stub.TestCase):
   """Base class for test cases that mock retry loop."""
@@ skipping 346 matching lines @@
     for value, expected in data:
       self.assertEqual(expected, net.fix_url(value))
 
 
 if __name__ == '__main__':
   logging.basicConfig(
       level=(logging.DEBUG if '-v' in sys.argv else logging.FATAL))
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   unittest.main()