Add scripts to semi-automate publishing of ChromeVox webstore extension using webstore API.

chrome/browser/resources/chromeos/chromevox/tools/generate_manifest.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.
 
 import json
 import io
 import optparse
 import os
@@ skipping 30 matching lines @@
   parser.usage = '%prog [options] <template_manifest_path>'
   parser.add_option(
       '-o', '--output_manifest', action='store', metavar='OUTPUT_MANIFEST',
       help='File to place generated manifest')
   parser.add_option(
       '-g', '--is_guest_manifest', action='store', metavar='GUEST_MANIFEST',
       help='Generate a guest mode capable manifest')
   parser.add_option(
       '--use_chromevox_next', action='store', metavar='CHROMEVOX2',
       help='Generate a ChromeVox next manifest')
+  parser.add_option(
+      '--set_version', action='store', metavar='SET_VERSION',
+      help='Set the extension version')
+  parser.add_option(
+      '--key', action='store', metavar='KEY',
+      help='Set the extension key')
 
   options, args = parser.parse_args()
   if len(args) != 1:
     print >>sys.stderr, 'Expected exactly one argument'
     sys.exit(1)
   processJinjaTemplate(args[0], options.output_manifest, parser.values.__dict__)
 
 if __name__ == '__main__':
   main()