Bug 1909099 - Always clean up old session restore and sync log files....

        filename,

        this._log

      );

      // It's not completely clear to markh why we only do log cleanups

      // for errors, but for now the Sync semantics have been copied...

      // (one theory is that only cleaning up on error makes it less

      // likely old error logs would be removed, but that's not true if

      // there are occasional errors - let's address this later!)

      if (reason == this.ERROR_LOG_WRITTEN && !this._cleaningUpFileLogs) {

      if (!this._cleaningUpFileLogs) {

        this._log.trace("Running cleanup.");

        try {

          await this.cleanupLogs();