[NaCl SDK] Convert python scripts from optparse to argparse.

native_client_sdk/src/build_tools/tests/build_version_test.py

 #!/usr/bin/env python
 # Copyright (c) 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 import os
 import sys
 import collections
 import unittest
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 BUILD_TOOLS_DIR = os.path.dirname(SCRIPT_DIR)
 CHROME_SRC = os.path.dirname(os.path.dirname(os.path.dirname(BUILD_TOOLS_DIR)))
-MOCK_DIR = os.path.join(CHROME_SRC, "third_party", "pymock")
+MOCK_DIR = os.path.join(CHROME_SRC, 'third_party', 'pymock')
 
 # For the mock library
 sys.path.append(MOCK_DIR)
 import mock
 
 sys.path.append(BUILD_TOOLS_DIR)
 import build_version
 
 ProcInfo = collections.namedtuple('ProcInfo', ['returncode', 'output'])
 
@@ skipping 79 matching lines @@
   def testChromeCommitPositionDepthTwo(self):
     self.mockDepthTwoGitCommand()
     result = build_version.ChromeCommitPosition()
     self.assertEqual(
         result,
         '6a8b61d6be4656e682eba005a1dd7f129789129c-refs/heads/master@{#292480}')
 
 
 if __name__ == '__main__':
   unittest.main()