and sends your data to Google
You can turn off ALL information gathering options in Chrome by simply unticking boxes in settings and changing default search provider. In fact this is all those privacy-focused Chromium derivatives like SRware Iron do, they just remove those options completely.
I mean, if you have prediction service turned on and Google set as search provider, OF COURSE everything you type into omnibox will be sent to Google. Just like with Spotlight in Yosemite.