Fix python scripts in src/media

media/tools/layout_tests/layouttests_unittest.py

-#!/usr/bin/python
+#!/usr/bin/env python
 # Copyright (c) 2011 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 unittest
 
 from layouttests import LayoutTests
 from test_expectations import TestExpectations
 
@@ skipping 27 matching lines @@
   def testGetParentDirectoryList(self):
     testname_list = ['hoge1/hoge2/hoge3.html', 'hoge1/x.html',
                      'hoge1/hoge2/hoge4.html']
     expected_result = ['hoge1/', 'hoge1/hoge2/']
     self.assertEquals(LayoutTests.GetParentDirectoryList(testname_list),
                       expected_result)
 
 
 if __name__ == '__main__':
   unittest.main()