Google tests all kinds of features and changes in Chrome, but many users likely won't notice any of these tweaks which can be accessed as they aren't generally available in the stable version of Chrome that ships on devices. For the more bleeding edge features, users will need to get a hold of either the Dev channel or Canary builds of Chrome, both of which are now available on Android, with Chrome Canary having been recently launched on the Play Store as of earlier this month and the Dev build having been out quite a while longer. If you use either of these Chrome versions, it's possible to move your address bar by way of an unassuming Chrome flag.
With just about any browser, you'll typically find the address bar at the top of the page when the app opens, and Chrome is of course no different. Google does give an option to transplant the address bar to the bottom though if you prefer, and all you need is to have either the Dev or Canary builds of the Chrome app installed on your device. Once you have that out of the way, getting to the flag is a lot simpler than you might think.
The feature, which is called Chrome Home, can be accessed by opening up either of the browser versions mentioned above, and then typing chrome://flags/#enable-chrome-home into the address bar. After hitting the enter key on the keyboard, a list of flags will pop up, but Chrome Home will be highlighted as well as listed at the very top of the list. You should also see a dropdown menu that you can interact with and once tapped you can change it to "enabled" which will move the address bar, however, not before restarting the Chrome Dev app. After you enable the Chrome Home flag, the browser will pop up a button asking you to relaunch the browser and once this button is pressed it will automatically relaunch the browser for you. This may happen two or three times before the browser fully opens. After this, though, everything should be functional and the browser bar will have been moved.