tree 0dcb8d86126242279e422c66d48c14577cb9f4af
parent 4c021ee1bca85957cb63bff8d948ff9de7adc8a4
author Tony Wickham <twickham@google.com> 1518120654 -0800
committer Tony Wickham <twickham@google.com> 1518726016 -0800

Remove back button when on home screen

Add OverviewInteractionState to handle setting OverviewInteractionFlags.

Hide back button when in NORMAL state and launcher's window is focused.
Show it when in other states or when launcher's window loses focus.

Change-Id: I35919561b9972789e995f1cc434c23e2afe9e77c