Predator and CL could not provide any possible suspects.

Using Code Search for the file, "media_stream_manager.cc" and observing some recent changes in the below file. 
https://chromium.googlesource.com/chromium/src/+log/7b8bbfb4014270ab8d6918434f784848ae34790d/content/browser/renderer_host/media/media_stream_manager.cc

chfremer@ -- As per the above link observing some recent changes from your end, 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.

Thanks!

ClusterFuzz has detected this issue as fixed in range 568508:568509.

Detailed report: https://clusterfuzz.com/testcase?key=5323498923491328

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_lsan_chrome_mp
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  request->state(device.type) == MEDIA_REQUEST_STATE_OPENING in media_stream_manag
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_lsan_chrome_mp&range=565322:565326
Fixed: https://clusterfuzz.com/revisions?job=linux_lsan_chrome_mp&range=568508:568509

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5323498923491328

See https://github.com/google/clusterfuzz-tools for more information.

If you suspect that the result above is incorrect, try re-doing that job on the test case report page.

ClusterFuzz testcase 5323498923491328 is verified as fixed, so closing issue as verified.

If this is incorrect, please add ClusterFuzz-Wrong label and re-open the issue.