Port chromevox build to GN.

chrome/browser/resources/chromeos/chromevox/tools/generate_test_messages.py

 #!/usr/bin/env python
 
 # Copyright 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.
 
 '''Generates test_messages.js from an extension message json file.'''
 
 import optparse
 import sys
@@ skipping 16 matching lines @@
 def main():
   parser = optparse.OptionParser(description=__doc__)
   parser.add_option('-o', '--output_file', action='store',
                     metavar='SPEC',
                     help=('Where to output the generated deps file.'))
   options, args = parser.parse_args()
   if options.output_file is None:
     Die('Output file not specified')
   if len(args) != 1:
     Die('Exactly one input file must be specified')
-  in_file_name = args[0];
+  in_file_name = args[0]
   with open(in_file_name) as in_file:
     json = in_file.read().strip()
   with open(options.output_file, 'w') as out_file:
     out_file.write(_JS_TEMPLATE % {'in_file': in_file_name, 'json': json})
 
 
 if __name__ == '__main__':
   main()