A few weeks ago, a post from the Chrome blog mentioned that Chrome for iOS will integrate the omnibox with Google Search. “Now you can see your search term in the omnibox, instead of the long search URL. This will help you refine search queries and view more content on the results page. This feature will roll out in the coming weeks, so you may not see it right away after upgrading.”
I’ve noticed this feature when using the incognito mode. It’s almost like the experimental feature from Chrome OS: Google’s mobile interface no longer includes a search box and the query is displayed in the omnibox, where you can change it. If you go to google.com, you’ll still see the regular Google search box and the query won’t be displayed in the omnibox.