function setTemporaryFsByDefault(src) {
    var uri;
    try {
        uri = new Windows.Foundation.Uri(src);
    } catch (e) {
        if (e.number === PARAMETER_IS_INCORRECT) {
            // Use TEMPORARY fs there is no 'scheme:'
            uri = new Windows.Foundation.Uri(tempFolderAppDataBasePath, src);
        } else {
            throw e;
        }
    } finally {
        return uri;
    }
}