You'll get this message if you try to download Google Chrome from Iran: "Thanks for your interest, but the product that you're trying to download is not available in your country."
http://dl.google.com/service/prod_unavailable.html
Speaking about law, it's understandable that they are required to do so, but isn't it in contrast to what the US government is saying about the Iranian internet users and their freedom? I mean come on guys, it's just a Web Browser. Until then, my best friends will be Safari and other browsers like Firefox, specially now that the latest beta seems pretty much fast on my Mac.