Chrome Version: 71.0.3555.0/11085.0.0 dev channel Reks,Daisy,Kip
OS: Chrome OS

What steps will reproduce the problem?
(1)Recover build>> In OOBE, click on accessibility and enable On-screen Keyboard
(2)Keep tabbing and observe On-screen keyboard toggle button, only knob is present and slider goes missing

Actual: Slider of onscreen keyboard toggle button goes missing while tabbing 
Expected: Toggle button should be seen properly

This is a Regression issue as same is working fine in M69

NOTE: Issue is seen in M70 as well.

Attaching screencasts for reference..
 

Deleted: ActualVKKnob.mp4 7.4 MB

	ActualVKKnob.mp4 7.4 MB View Download

Deleted: ExpectedVKKnob.mp4 4.1 MB

	ExpectedVKKnob.mp4 4.1 MB View Download