luci-py: Making __file__ usage unicode safe.

client/tests/lru_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.
 
 import json
 import logging
 import os
 import sys
 import tempfile
 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)
 
 from utils import lru
 
 
 class LRUDictTest(unittest.TestCase):
   @staticmethod
   def prepare_lru_dict(keys):
     """Returns new LRUDict with given |keys| added one by one."""
     lru_dict = lru.LRUDict()
@@ skipping 195 matching lines @@
       load_from_state(json.dumps([
           ['key', 'value'],
           ['key', 'another_value'],
       ]))
 
 
 if __name__ == '__main__':
   VERBOSE = '-v' in sys.argv
   logging.basicConfig(level=logging.DEBUG if VERBOSE else logging.ERROR)
   unittest.main()