UserAgent: Mozilla/5.0 (X11; CrOS x86_64 10575.58.0) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/67.0.3396.99 Safari/537.36
Platform: 10575.58.0 (Official Build) stable-channel caroline

Steps to reproduce the problem:
This is a feature request/suggestion for a temporary fix for 820368 (Investigate improvements to shelf on tablet mode)

What is the expected behavior?
The desired behavior is that when some flag in chrome://flags is set, autohide and shelf positioning are allowed while in tablet mode.

What went wrong?
Currently, when a Chromebook is in tablet mode, the options to reposition and autohide the shelf are disabled, the shelf is forced to the bottom of the screen, and the shelf cannot be hidden. See https://bugs.chromium.org/p/chromium/issues/detail?id=820368
 for more info.

Did this work before? N/A 

Chrome version: 67.0.3396.99  Channel: stable
OS Version: 10575.58.0
Flash Version: 30.0.0.113 /opt/google/chrome/pepper/libpepflashplayer.so

Restoring this functionality but hiding it behind a flag would be a good compromise that allows certain users to enable it if they really need it while ensuring that any bugs it has don't impact other users.