I have upgraded my system (amd64) from snapshot today and it seems that chromium browser package is not available. pkg_add -u said: Couldn't find updates for chromium-51.0.2704.106 I checked mirror http://ftp.hostserver.de and http://ftp.fr.openbsd.org visiting by browser and there isn't any package of Chromium browser.
However http://openports.se/www/chromium tells that port still exists.