Predator and CL could not provide any possible suspects.
Using the code search for the file, “Document.cpp” assigning to concern owner from GIT revision log.
Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/94d7eeddc2025a863910735110d3815e3c9382c2

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

Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

ClusterFuzz has detected this issue as fixed in range 537260:537261.

Detailed report: https://clusterfuzz.com/testcase?key=5270475692572672

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_asan_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  !frame_ || frame_->Tree().ChildCount() == 0 in Document.cpp
  blink::Document::Shutdown
  blink::XSLTProcessor::CreateDocumentFromSource
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=440490:440591
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_content_shell_drt&range=537260:537261

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5270475692572672

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 5270475692572672 is verified as fixed, so closing issue as verified.

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