Just like everywhere else.
This becomes a nasty little quandary for the ethics department - and it'll be interesting to see what comes of it. The Chrome browser is not only fairly decent (ignoring the current lack of extensions), but evolving at what can only be considered to be an alarming rate, at least if your a competitor.
"Consequences, Schmonsequences, as long as I'm rich." -- "Ali Baba Bunny" [1957, Chuck Jones]