Fix webkit-patch --help.

third_party/WebKit/Tools/Scripts/webkitpy/tool/webkit_patch.py

 # Copyright (c) 2010 Google Inc. All rights reserved.
 # Copyright (c) 2009 Apple Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 78 matching lines @@
             PrettyDiff(),
             PrintBaselines(),
             PrintExpectations(),
             Rebaseline(),
             RebaselineCL(),
             RebaselineExpectations(),
             RebaselineJson(),
             RebaselineServer(),
             RebaselineTest(),
         ]
-        self.help_command = HelpCommand()
+        self.help_command = HelpCommand(tool=self)
         self.commands.append(self.help_command)
 
     def main(self, argv=None):
         argv = argv or sys.argv
         (command_name, args) = self._split_command_name_from_args(argv[1:])
 
         option_parser = self._create_option_parser()
         self._add_global_options(option_parser)
 
         command = self.command_by_name(command_name) or self.help_command
@@ skipping 25 matching lines @@
             command_index += 1
         else:
             return (None, args[:])
 
         command = args[command_index]
         return (command, args[:command_index] + args[command_index + 1:])
 
     def _create_option_parser(self):
         usage = "Usage: %prog [options] COMMAND [ARGS]"
         name = optparse.OptionParser().get_prog_name()
-        return HelpPrintingOptionParser(epilog_method=self.help_command._help_epilog, prog=name, usage=usage)
+        return HelpPrintingOptionParser(epilog_method=self.help_command.help_epilog, prog=name, usage=usage)
 
     def _add_global_options(self, option_parser):
         global_options = self.global_options or []
         for option in global_options:
             option_parser.add_option(option)
 
     # FIXME: This may be unnecessary since we pass global options to all commands during execute() as well.
     def _handle_global_options(self, options):
         self.initialize_scm(options.patch_directories)
 
@@ skipping 12 matching lines @@
             return False
         if command.requires_local_commits:
             return self.scm().supports_local_commits()
         return True
 
     def command_by_name(self, command_name):
         for command in self.commands:
             if command_name == command.name:
                 return command
         return None