Predator and CL could not provide any possible suspects.
Using the code search for the file, “simple_string_dictionary.h” assigning to concern owner from GIT blame.
Suspecting Commit#
https://chromium.googlesource.com/breakpad/breakpad.git/+/8a0edac9abfec72e0a86aebd6a0a38761c7c8962

@rsesek -- Could you please look into this issue, kindly reassign if it has nothing to do with your changes.
Thank You.

ClusterFuzz has detected this issue as fixed in range 542340:542344.

Detailed report: https://clusterfuzz.com/testcase?key=5811897432801280

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_tsan_chrome_mp
Platform Id: linux

Crash Type: Data race WRITE 1
Crash Address: 0x7bb400000c78
Crash State:
  crash_reporter::internal::CrashKeyStringImpl::Set
  ChromeContentClient::SetActiveURL
  content::RenderFrameImpl::OnMessageReceived
  
Sanitizer: thread (TSAN)

Fixed: https://clusterfuzz.com/revisions?job=linux_tsan_chrome_mp&range=542340:542344

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5811897432801280

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.