luci-py: Making __file__ usage unicode safe.

client/tests/file_path_test.py

 #!/usr/bin/env python
 # coding=utf-8
 # 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 getpass
 import logging
 import os
 import tempfile
 import unittest
 import StringIO
 import subprocess
 import sys
 import time
 
-BASE_DIR = unicode(os.path.dirname(os.path.abspath(__file__)))
+BASE_DIR = os.path.dirname(os.path.abspath(
+    __file__.decode(sys.getfilesystemencoding())))
 ROOT_DIR = os.path.dirname(BASE_DIR)
 sys.path.insert(0, ROOT_DIR)
 sys.path.insert(0, os.path.join(ROOT_DIR, 'third_party'))
 
-FILE_PATH = unicode(os.path.abspath(__file__))
+FILE_PATH = os.path.abspath(__file__.decode(sys.getfilesystemencoding()))
 
 from depot_tools import auto_stub
 from depot_tools import fix_encoding
 import test_utils
 from utils import file_path
 from utils import fs
 
 
 def write_content(filepath, content):
   with fs.open(filepath, 'wb') as f:
@@ skipping 377 matching lines @@
       file_path.rmtree(dirpath)
 
 
 if __name__ == '__main__':
   fix_encoding.fix_encoding()
   logging.basicConfig(
       level=logging.DEBUG if '-v' in sys.argv else logging.ERROR)
   if '-v' in sys.argv:
     unittest.TestCase.maxDiff = None
   unittest.main()