Chrome Version: M68 and 
OS: Android 

What steps will reproduce the problem?
(1) By default microphone is blocked

What is the expected result?
Microphone permission set by default?


What happens instead?
There is a spike in microphone issues of 26%

Examples
https://listnr.corp.google.com/report/85617410833
https://listnr.corp.google.com/report/85617222274
https://listnr.corp.google.com/report/85614782678