Chrome Version: 68.0.3440.87
OS: Mozilla/5.0 (X11; CrOS x86_64 10718.71.2) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/68.0.3440.87 Safari/537.36
Device: Pixelbook

What steps will reproduce the problem?
(0) change the screen resolution to a higher value than the default (by typing shift-alt-plus)
(1) Right-click on shelf and check "Autohide shelf"
(2) Move mouse cursor to bottom of the screen

What is the expected result?

The shelf should appear every time the mouse moves to the bottom of the screen.

What happens instead?

The shelf only appears about 50% of the time. It *feels* like the shelf only pops up when I move the mouse to the second-to-last row of pixels on the screen, but if I move the mouse all the way to the bottom of the screen it does not trigger. But I can't tell exactly.

If I change the screen back to the default resolution this does not happen.

So, I think there is a bug with the calculation of the lowest cursor position required to display the shelf, when the screen resolution has been changed. Maybe?