Chrome Version : 67.0.3368.0 (Official Build) 0f36d3901569535a63173a1835f8dfbcf7b66d60-refs/heads/master@{#542340} 32/64-bit
OS : Windows(7,8,8.1,10), Mac(10.13.4, 10.12.6, 10.13.1) 

What steps will reproduce the problem?
1. Install latest chrome Canary # 67.0.3368.0 build and launch it.
2. Open NTP, click on 'Microphone' icon in fake box and 'Allow' the microhpone permission.
3. Observe.

Actual Result : Chrome crashes after allowing 'Microphone' permission.

Expected Result : Browser should not crash after allowing 'Microphone' permission.

Crash IDs:
-------------------
Crash Report ID 1b6e4c7e398c0afa (Local Crash ID: 1224de35-0de4-41b5-98f5-4ab124167dce)
Crash Report ID faddb75264d27471 (Local Crash ID: 3238d0f2-8ec3-4913-99b9-b6e0de9f5d2c)

This is a regression issue, broken in M-67 and providing the bisect results using per-revision script :
Good Build : 67.0.3366.0 (Revision : 541889)
Bad Build : 67.0.3367.0 (Revision : 542330)

You are probably looking for a change made after 541904 (known good), but no later than 541905 (first known bad).

CHANGE-LOG URL:

https://chromium.googlesource.com/chromium/src/+log/5fcad4939c2de514758faa2d3735a4729af65101..818bea4e4f6a919a93f3af3e2375f69099d2dfe2

Suspect : https://chromium.googlesource.com/chromium/src/+/818bea4e4f6a919a93f3af3e2375f69099d2dfe2

@rockot : Could you please check whether this is caused with respect to your change, if not please help us in assigning it to the right owner.

Note : 
1. Will soon update information regarding Linux(14.04 LTS) OS
2. Issue is not reproducible on today's Dev #66.0.3359.26(Clang) and 66.0.3359.27(PGO) build.
 

Deleted: Actual_Result.mp4 304 KB

	Actual_Result.mp4 304 KB View Download

Deleted: Expected_Result.mp4 289 KB

	Expected_Result.mp4 289 KB View Download