Since Google makes revenue through advertising I wonder if Chrome will feature 'Adblock' like FF? I dunno...just asking.
If someone writes a plugin to block ads, I strongly doubt Google would attempt to break compatibility with it. Besides that, the browser is open source, so all someone would have to do is fork the code, remove the AdBlock breakage, and everyone gets on with life as usual.
Your search patterns are much more valuable to Google than some lost ad revenue.