Unable to find the possible suspect using CL and find it.
Using Code Search for the file, "CSSFontSelector.cpp" assigning to the concern owner.

Suspecting the Commit#
https://chromium.googlesource.com/chromium/src/+/836e1f9ab3c35283a065df5557e5836402043c35

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

nzolghadr@ can you look at this. Looking at the the change it appears to be related to the pointer event testing. We probably need an early out in event_sender or something so this doesn't crash.

ClusterFuzz has detected this issue as fixed in range 444249:444262.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4774862188183552

Fuzzer: inferno_twister
Job Type: mac_asan_content_shell
Platform Id: mac

Crash Type: CHECK failure
Crash Address: 
Crash State:
  false. Touch events not supported for this browser in synthetic_gesture_target_b
  content::SyntheticGestureTargetBase::DispatchWebTouchEventToPlatform
  content::SyntheticGestureTargetBase::DispatchInputEventToPlatform
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_content_shell&range=398628:398731
Fixed: https://cluster-fuzz.appspot.com/revisions?job=mac_asan_content_shell&range=444249:444262

Minimized Testcase (0.33 Kb): https://cluster-fuzz.appspot.com/download/AMIfv97W-3mZSF5FM0Mz7gt2EctV5CEYkQf8IfMGjEgKUS4j4vGH2ouI-pJ427HYfc5a57L-Z1VvThgFyGeVfj8TwUihHhY_B-D4QaoGGFPX3GEaKC1qufNj541lEqBQ91KwE6jLnzQl0KTAjWq4mXASlCxmBya1aQ?testcase_id=4774862188183552

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 4774862188183552 is verified as fixed, so closing issue.

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