Clear cookies

[osanwe]

Need to clear cookies after login like for make user login data private.

/* Return codes:
 * 0 - success
 * 1 - cache doesn't exist
 * -1 - cannot delete cache
 * -2 - failed to find cache directory
 */
int Tools::clearCookies() {
    QStringList dataPaths = QStandardPaths::standardLocations(QStandardPaths::DataLocation);
    if(dataPaths.size()) {
        QDir webData(QDir(dataPaths.at(0)).filePath(".QtWebKit"));
        if(webData.exists()) {
            if(webData.removeRecursively())
                return 0;
            else
                return -1;
        }
        else
            return 1;
    }
    return -2;
}