Fix python scripts in src/chrome/

chrome/test/pyautolib/generate_docs.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 optparse
 import os
 import pydoc
 import shutil
 import sys
 
@@ skipping 17 matching lines @@
                   '../../../third_party/'))
   sys.path.append(options.pyautolib)
 
   # Get a snapshot of the current directory where pydoc will export the files
   previous_contents = set(os.listdir(os.getcwd()))
   pydoc.writedocs(options.pyautolib)
   current_contents = set(os.listdir(os.getcwd()))
 
   if options.dir == os.getcwd():
     print 'Export complete, files are located in %s' % options.dir
-    return
+    return 1
 
   new_files = current_contents.difference(previous_contents)
   for file_name in new_files:
     basename, extension = os.path.splitext(file_name)
     if extension == '.html':
       # Build the complete path
       full_path = os.path.join(os.getcwd(), file_name)
       existing_file_path = os.path.join(options.dir, file_name)
       if os.path.isfile(existing_file_path):
         os.remove(existing_file_path)
       shutil.move(full_path, options.dir)
 
   print 'Export complete, files are located in %s' % options.dir
+  return 0
 
 
 if __name__ == '__main__':
-  main()
-
+  sys.exit(main())