Delete a bunch of dead python code.

sky/tools/webkitpy/tool/commands/stepsequence.py

-# Copyright (C) 2009 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
-# in the documentation and/or other materials provided with the
-# distribution.
-#     * Neither the name of Google Inc. nor the names of its
-# contributors may be used to endorse or promote products derived from
-# this software without specific prior written permission.
-#
-# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
-# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
-# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
-# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
-# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
-# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
-# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
-# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
-# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
-# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
-
-import logging
-import sys
-
-from webkitpy.tool import steps
-
-from webkitpy.common.system.executive import ScriptError
-
-_log = logging.getLogger(__name__)
-
-
-class StepSequenceErrorHandler():
-    @classmethod
-    def handle_script_error(cls, tool, patch, script_error):
-        raise NotImplementedError, "subclasses must implement"
-
-    @classmethod
-    def handle_checkout_needs_update(cls, tool, state, options, error):
-        raise NotImplementedError, "subclasses must implement"
-
-
-class StepSequence(object):
-    def __init__(self, steps):
-        self._steps = steps or []
-
-    def options(self):
-        collected_options = [
-            steps.Options.parent_command,
-            steps.Options.quiet,
-        ]
-        for step in self._steps:
-            collected_options = collected_options + step.options()
-        # Remove duplicates.
-        collected_options = sorted(set(collected_options))
-        return collected_options
-
-    def _run(self, tool, options, state):
-        for step in self._steps:
-            step(tool, options).run(state)
-
-    # Child processes exit with a special code to the parent queue process can detect the error was handled.
-    handled_error_code = 2
-
-    @classmethod
-    def exit_after_handled_error(cls, error):
-        _log.error(error)
-        sys.exit(cls.handled_error_code)
-
-    def run_and_handle_errors(self, tool, options, state=None):
-        if not state:
-            state = {}
-        try:
-            self._run(tool, options, state)
-        except ScriptError, e:
-            if not options.quiet:
-                _log.error(e.message_with_output())
-            if options.parent_command:
-                command = tool.command_by_name(options.parent_command)
-                command.handle_script_error(tool, state, e)
-            self.exit_after_handled_error(e)