Using Find it, assigning to the concern owner. Below are the find it results --
The result is a list of CLs that change the crashed files. 

Author: haraken
Project: chromium
Changelist: https://chromium.googlesource.com/chromium/src/+/7b372233ed3d9859e1204aa3a9af7f5f9bb32a56
Time: Mon Dec 12 04:30:37 2016
File MediaStreamTrack.cpp is changed in this cl (and is part of stack frame #3, "blink::MediaStreamTrack::propagateTrackEnded")
Minimum distance from crash line to modified line: 5. (file: MediaStreamTrack.cpp, crashed on: 265, modified: 260).

@haraken -- Could you please look into the issue, kindly re-assign if this is not related to your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 438498:440663.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=6184190241669120

Fuzzer: lcamtuf_cross_fuzz
Job Type: mac_asan_chrome
Platform Id: mac

Crash Type: UNKNOWN READ
Crash Address: 0x000000000061
Crash State:
  blink::MediaStream::trackEnded
  blink::MediaStreamTrack::propagateTrackEnded
  blink::MediaStreamSource::setReadyState
  
Regressed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_chrome&range=437664:437909
Fixed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_chrome&range=438498:440663

Unminimized Testcase: https://cluster-fuzz.appspot.com/download/AMIfv97qq9Hgv3WDP5GUV28Nwch-txz6cvAqO-xDeztBoVu-mc9k8rixasUEis3aV05rgptjqkHEk3ODqmRc97sdma0a3L_LTS-VqNYT77AKcEp-S0dLXWQeH5ldh0uf7ca9Zwo7wxJSlcsM1fAsIWKa9mUwr_kkjNNXWXcEFnwy90VuolOEpYQ?testcase_id=6184190241669120


See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 6184190241669120 is verified as fixed, so closing issue.

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