Predator and CL could not provide any possible suspects.
Using Code Search for the file, "tzrule.cpp" assigning to the concern owner who might be related.

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

This doesn't seem to related to DOM.

ClusterFuzz has detected this issue as fixed in range 500415:500457.

Detailed report: https://clusterfuzz.com/testcase?key=5650993693065216

Fuzzer: dstockwell-anim-gen
Job Type: windows_asan_chrome_no_sandbox
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000050
Crash State:
  blink::MediaValuesCached::ColorGamut
  blink::TaskRunnerHelper::Get
  blink::TaskRunnerHelper::Get
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=499964:499992
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_chrome_no_sandbox&range=500415:500457

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5650993693065216

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 5650993693065216 is verified as fixed, so closing issue as verified.

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