Find it and CL did not provide any possible suspects.
Using Code Search for the file, "media::AudioTimestampValidator::CheckForTimestampGap" assigning to the concern owner.

Suspecting the Commit#
https://chromium.googlesource.com/chromium/src/+/39a7f93d67f79d6afadb0f74254eef19b5ff9318

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

ClusterFuzz has detected this issue as fixed in range 443718:443777.

Detailed report: https://cluster-fuzz.appspot.com/testcase?key=4598450877628416

Fuzzer: libfuzzer_media_pipeline_integration_fuzzer
Job Type: libfuzzer_chrome_asan_debug
Platform Id: linux

Crash Type: UNKNOWN
Crash Address: 0x03e90000230f
Crash State:
  base::debug::DebugBreak
  media::AudioTimestampValidator::CheckForTimestampGap
  media::DecoderStreamTraits<
  
Sanitizer: address (ASAN)

Regressed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=413124:413277
Fixed: https://cluster-fuzz.appspot.com/revisions?job=libfuzzer_chrome_asan_debug&range=443718:443777

Minimized Testcase (0.63 Kb): https://cluster-fuzz.appspot.com/download/AMIfv959zELQzRzu-QaOZ5bdKdklmS_2q9_i0i9cucg4ADiZGYYy6M0KGCea66Or-3I6TrKn5AISps7Z4N9fsfGRtb3LjIwWZSuPwAiglPg_w7hJoSkXJ57rHR8nqlO_N77nhR44x_Pf7HeVRdVyJWC9_g1F7M6WaQ?testcase_id=4598450877628416

See https://chromium.googlesource.com/chromium/src/+/master/testing/libfuzzer/reproducing.md 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 4598450877628416 is verified as fixed, so closing issue.

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