Provide instructions if -o or -r is used on public bisect-builds.py

tools/bisect-builds.py

 #!/usr/bin/env python
 # Copyright (c) 2012 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.
 
 """Snapshot Build Bisect Tool
 
 This script bisects a snapshot archive using binary search. It starts at
 a bad revision (it will try to guess HEAD) and asks for a last known-good
 revision. It will then binary search across this revision range by downloading,
@@ skipping 983 matching lines @@
     data = json.loads(url.read())
     if 'git_sha' in data:
       return data['git_sha']
 
 def PrintChangeLog(min_chromium_rev, max_chromium_rev):
   """Prints the changelog URL."""
 
   print ('  ' + CHANGELOG_URL % (GetGitHashFromSVNRevision(min_chromium_rev),
          GetGitHashFromSVNRevision(max_chromium_rev)))
 
+def error_internal_option(option, opt, value, parser):
+   raise optparse.OptionValueError(
+         'The -o and -r options are only\navailable in the internal version of '
+         'this script. Google\nemployees should visit http://go/bisect-builds '
+         'for\nconfiguration instructions.')
 
 def main():
   usage = ('%prog [options] [-- chromium-options]\n'
            'Perform binary search on the snapshot builds to find a minimal\n'
            'range of revisions where a behavior change happened. The\n'
            'behaviors are described as "good" and "bad".\n'
            'It is NOT assumed that the behavior of the later revision is\n'
            'the bad one.\n'
            '\n'
            'Revision numbers should use\n'
@@ skipping 65 matching lines @@
                     default=False,
                     help='Use a local file in the current directory to cache '
                          'a list of known revisions to speed up the '
                          'initialization of this script.')
   parser.add_option('--verify-range',
                     dest='verify_range',
                     action='store_true',
                     default=False,
                     help='Test the first and last revisions in the range ' +
                          'before proceeding with the bisect.')
+  parser.add_option("-r", action="callback", callback=error_internal_option)
+  parser.add_option("-o", action="callback", callback=error_internal_option)
 
   (opts, args) = parser.parse_args()
 
   if opts.archive is None:
     print 'Error: missing required parameter: --archive'
     print
     parser.print_help()
     return 1
 
   if opts.asan:
@@ skipping 85 matching lines @@
     if min_blink_rev != max_blink_rev:
       print ('NOTE: There is a Blink roll in the range, '
              'you might also want to do a Blink bisect.')
 
     print 'CHANGELOG URL:'
     PrintChangeLog(min_chromium_rev, max_chromium_rev)
 
 
 if __name__ == '__main__':
   sys.exit(main())