Fix python scripts in src/chrome/

chrome/tools/automated_ui_test_tools/ui_action_generator.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.
 
 """A simple main function to print ui action sequences.
 
 Action sequences are generated using chrome/test/functional/ui_model.py
 and are output in the format required by automated_ui_tests build target.
 
 Generate 100 command sequences to ui.txt:
@@ skipping 48 matching lines @@
       browser = ui_model.UpdateState(browser, action)
       action_tuple = action.split(';')
       action_element = doc.createElement(action_tuple[0])
       if len(action_tuple) == 2:
         action_element.setAttribute('url', action_tuple[1])
       command.appendChild(action_element)
   return doc.toprettyxml()
 
 
 def ParseCommandLine():
-  """Parses the command line.
-
-  Returns:
-    List of options and their values, and unparsed args.
+  """Returns the list of options and their values, and unparsed args.
   """
   parser = optparse.OptionParser()
   parser.add_option('-o', '--output', dest='output_file', type='string',
                     action='store', default='ui_actions.txt',
                     help='the file to output the command list to')
   parser.add_option('-c', '--num_commands', dest='num_commands',
                     type='int', action='store', default=1,
                     help='number of commands to output')
   parser.add_option('-a', '--actions-per-command', dest='actions_per_command',
                     type='int', action='store', default=25,
@@ skipping 10 matching lines @@
   For use as input for automated_ui_tests build target.
   """
   options, args = ParseCommandLine()
   command_list = CreateUIActionList(options.actions_per_command,
                                     options.num_commands,
                                     options.seed)
   f = open(options.output_file, 'w')
   f.write(command_list)
   f.close()
   print command_list
+  return 0
 
 
 if __name__ == '__main__':
-  main()
+  sys.exit(main())