The Online Safety (Browsing Protection & Parental Control) in Internet Security 2012 is supported on Google Chrome, it will work to a limited extend. Online Safety will block sites when needed but it will not display a block message page.
It means, that you have the same protection as with the IE or FF but you have no visuell help of F-Secure.
You will get no block message (you will see only a blank white page), you have no toolbar and if you use the Googlesearch, you will not see the green hook.