Add a bug link to a TODO

scripts/slave/compile.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.
 
 """A tool to build chrome, executed by buildbot.
 
   When this is run, the current directory (cwd) should be the outer build
   directory (e.g., chrome-release/build/).
 
@@ skipping 472 matching lines @@
   option_parser = optparse.OptionParser()
   option_parser.add_option('--clobber', action='store_true', default=False,
                            help='delete the output directory before compiling')
   option_parser.add_option('--target', default='Release',
                            help='build target (Debug or Release)')
   option_parser.add_option('--src-dir', default=None,
                            help='path to the root of the source tree')
   option_parser.add_option('--mode', default='dev',
                            help='build mode (dev or official) controlling '
                                 'environment variables set during build')
-  # TODO(thakis): Remove this once bots no longer pass it in.
+  # TODO(thakis): Remove this, https://crbug.com/622768
   option_parser.add_option('--build-tool', default=None, help='ignored')
   option_parser.add_option('--build-args', action='append', default=[],
                            help='arguments to pass to the build tool')
   option_parser.add_option('--build-data-dir', action='store',
                            help='specify a build data directory.')
   option_parser.add_option('--compiler', default=None,
                            help='specify alternative compiler (e.g. clang)')
   if chromium_utils.IsLinux():
     option_parser.add_option('--cros-board', action='store',
                              help='If building for the ChromeOS Simple Chrome '
@@ skipping 40 matching lines @@
   options.src_dir = os.path.abspath(options.src_dir)
 
   options.target_output_dir = get_target_build_dir(args, options)
 
   assert options.build_tool in (None, 'ninja')
   return main_ninja(options, args)
 
 
 if '__main__' == __name__:
   sys.exit(real_main())