I noticed this few days ago on the dev build:
case ya’ll haven’t noticed, the Chrome’s wrench icon is no longer there :( i.imgur.com/rkbMh.png
— Sathya (@SathyaBhat) August 8, 2012
It’s been replaced with what I can only call.. “Three horizontal lines” which is really weird way of calling it :\
Having the wrench icon was so much better – have referred bringing up the menu quite a few times as “Click on the wrench” on Super User.