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

native_client_sdk/src/tools/tests/sel_ldr_test.py

 #!/usr/bin/env python
 # Copyright 2013 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 unittest
 
 SCRIPT_DIR = os.path.dirname(os.path.abspath(__file__))
 PARENT_DIR = os.path.dirname(SCRIPT_DIR)
 DATA_DIR = os.path.join(SCRIPT_DIR, 'data')
 CHROME_SRC = os.path.dirname(os.path.dirname(os.path.dirname(PARENT_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)
 sys.path.append(PARENT_DIR)
 
 import sel_ldr
 import mock
 
 
 class TestSelLdr(unittest.TestCase):
@@ skipping 25 matching lines @@
               get_platform.return_value = 'win'
               sel_ldr.main(['foo.nexe'])
               parse_header.assert_called_once_with('foo.nexe')
               self.assertEqual(call.call_count, 1)
               cmd = call.call_args[0][0]
               self.assertTrue('helper_bootstrap' not in cmd[0])
 
 
 if __name__ == '__main__':
   unittest.main()