Remove Command.bind_to_tool.

third_party/WebKit/Tools/Scripts/webkitpy/tool/commands/pretty_diff.py

 # Copyright (c) 2010 Google 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
 # copyright notice, this list of conditions and the following disclaimer
@@ skipping 33 matching lines @@
     help_text = "Shows the pretty diff in the default browser"
     show_in_main_help = True
 
     def __init__(self):
         options = [
             optparse.make_option("-g", "--git-commit", action="store", dest="git_commit",
                                  help=("Operate on a local commit. If a range, the commits are squashed into one. <ref>.... "
                                        "includes the working copy changes. UPSTREAM can be used for the upstream/tracking branch."))
         ]
         super(PrettyDiff, self).__init__(options)
+        self._tool = None
 
     def execute(self, options, args, tool):
+        self._tool = tool
         pretty_diff_file = self._show_pretty_diff(options)
         if pretty_diff_file:
             diff_correct = tool.user.confirm("Was that diff correct?")
             pretty_diff_file.close()
             if not diff_correct:
                 sys.exit(1)
 
     def _show_pretty_diff(self, options):
         if not self._tool.user.can_open_url():
             return None
@@ skipping 17 matching lines @@
         return self._tool.scm().create_patch(options.git_commit,
                                              changed_files=changed_files)
 
     def _open_pretty_diff(self, file_path):
         if self._tool.platform.is_cygwin():
             assert file_path.endswith('.html')
             self._tool.executive.run_command(['cygstart', file_path])
             return
         url = "file://%s" % urllib.quote(file_path)
         self._tool.user.open_url(url)