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
Google Chrome v39 introduces a new Avatar menu, which is now permanently displayed at the top-right corner of each window.
The only way to get rid of it is through the "experimental" flags. Type the following in the address bar to reveal the flag:
Set it to Disabled to turn it off, then restart Chrome entirely to apply the changes.
Note that this also works under Mac and linux.