Remove optional --commit-author argument from auto-rebaseline script.

third_party/WebKit/Tools/Scripts/webkitpy/common/checkout/scm/git.py

 # Copyright (c) 2009, 2010, 2011 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 247 matching lines @@
     def _remote_merge_base(self):
         return self._run_git(['merge-base', self._remote_branch_ref(), 'HEAD']).strip()
 
     def _remote_branch_ref(self):
         # Use references so that we can avoid collisions, e.g. we don't want to operate on refs/heads/trunk if it exists.
         remote_master_ref = 'refs/remotes/origin/master'
         if not self._branch_ref_exists(remote_master_ref):
             raise ScriptError(message="Can't find a branch to diff against. %s does not exist" % remote_master_ref)
         return remote_master_ref
 
-    def commit_locally_with_message(self, message, commit_all_working_directory_changes=True, author=None):
+    def commit_locally_with_message(self, message, commit_all_working_directory_changes=True):
         command = ['commit', '-F', '-']
         if commit_all_working_directory_changes:
             command.insert(1, '--all')
-        if author:
-            command.insert(1, "--author='%s'" % (author))
         self._run_git(command, input=message)
 
     # These methods are git specific and are meant to provide support for the Git oriented workflow
     # that Blink is moving towards, hence there are no equivalent methods in the SVN class.
 
     def pull(self):
         self._run_git(['pull'])
 
     def latest_git_commit(self):
         return self._run_git(['log', '-1', '--format=%H']).strip()
@@ skipping 25 matching lines @@
         if self.current_branch() != self._branch_tracking_remote_master():
             return False
         if len(self._local_commits(self._branch_tracking_remote_master())) > 0:
             return False
         return True
 
     def ensure_cleanly_tracking_remote_master(self):
         self._discard_working_directory_changes()
         self._run_git(['checkout', '-q', self._branch_tracking_remote_master()])
         self._discard_local_commits()