function callback(error, databaseNames)
        {
            if (error) {
                console.error("IndexedDBAgent error: " + error);
                return;
            }

            if (!this._databaseNamesBySecurityOrigin[securityOrigin])
                return;
            this._updateOriginDatabaseNames(securityOrigin, databaseNames);
        }
@param {?Protocol.Error} error
@param {!Array.<string>} databaseNames
@this {WebInspector.IndexedDBModel}