From an IT management point-of-view, Google Chrome does not play nice: users that have limited rights on the computer system they work on (a standalone computer or on a Terminal server) can simply install Google Chrome without an admin's consent, totally bypassing any kind of approval. Luckily, this can be countered by setting up software restrictions through a group policy.

I found this article explaining how: http://windowsitpro.com/windows/how-stop-users-installing-google-chrome