Chrome Version: 66.0.3378.0
OS: Android 8.1.0 on Pixel 2

What steps will reproduce the problem?
(1) Launch https://wwww.google.com
(2) Enter VR Browsing
(3) Click on the Overflow Menu to open
(4) Hover over menu items, specifically "New incognito tab" and "Close incognito tabs" menu items.
(5) Click on menu items.

What is the expected result?
Audio clues should be presented for Hover and Click of all items in the menu.  Similar to the Search Results items for the Omnibox.

What happens instead?
No sounds associated with the two incognito menu items.
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For graphics-related bugs, please copy/paste the contents of the about:gpu
page at the end of this report.