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.
If you push the "extra ice" button on the soft drink vending machine, you won't get any ice. If you push the "no ice" button, you'll get ice, but no cup.