Chrome Version       : 64.0.3253.3 (Official Build) dev (64-bit) (cohort: Dev)

What steps will reproduce the problem?
(1) Receive (or make) call in gmail with the hangouts mole
(2) Get error: "Hangouts needs access to your microphone to make calls. Click the blocked media icon at the top of your browser."
(3) Click the blocked media icon.
(4) Select "Always allow https://hangouts.google.com too access your microphone"

What is the expected result?
I can make and receive calls.

What happens instead?
Selecting "Always allow https://hangouts.google.com too access your microphone" does nothing, it always gets reverted the next time I click the icon.


Please provide any additional information below. Attach a screenshot if
possible.

First screenshot shows the hangouts mole, the error message, and the blocked media icon.
Selecting "Always allow https://hangouts.google.com too access your microphone" then Done does nothing.
The radio button always reverts back to "Continue blocking microphone access" when I click the block media icon again.

Second screenshot shows my microphone settings. Both https://hangouts.google.com and https://mail.google.com are already set to allowed.
 

Deleted: blocked.png 48.7 KB

	blocked.png 48.7 KB View Download

Deleted: microphone.png 20.7 KB

	microphone.png 20.7 KB View Download