Chrome Version: 63.0.3212.0/9930.0.0 Daisy,Reks,Candy
OS: Chrome OS

What steps will reproduce the problem?
(1)Recover build via USB >> Click on Accessibility button in Welcome screen
(2)Enable ChromeVox spoken feedback in Accessibility settings screen
(3)Now disable ChromeVox spoken feedback and Observe Shutdown button(Please refer video)

Expected: No such unnecessary movement of shutdown button should be seen when disabling ChromeVox Spoken Feedback.
Actual: Instead ,unnecessary movement of shutdown button is seen when disabling ChromeVox Spoken Feedback.

This is regression issue as it is working fine in 60.0.3112.80/9592.71.0 stable channel Daisy.

Attaching screen-cast for reference.
 

Deleted: Actual.mp4 11.2 MB

	Actual.mp4 11.2 MB View Download

Deleted: Expected.mp4 5.5 MB

	Expected.mp4 5.5 MB View Download