Chrome is generally going to be updated via Managed Play on the devices. Assuming you have the devices connected to a network that has access to Google Play then they should receive updates to Chrome automatically in the background. This is not the most ideal process as version control is basically non-existent, but its really the only method you can use if you also need the system webview implementation to be updated along with Chrome. Alternatively you may be able to download a Chrome APK and sideload via a Package, but you won't update the system webview using that method.