def clear_cookie(self, name, path="/", domain=None):
        """Deletes the cookie with the given name.

        Due to limitations of the cookie protocol, you must pass the same
        path and domain to clear a cookie as were used when that cookie
        was set (but there is no way to find out on the server side
        which values were used for a given cookie).
        """
        expires = datetime.datetime.utcnow() - datetime.timedelta(days=365)
        self.set_cookie(name, value="", path=path, expires=expires,
                        domain=domain)
dataset/ETHPy150Open RobotWebTools/rosbridge_suite/rosbridge_server/src/tornado/web.py/RequestHandler.clear_cookie/original