It seems related to landing this change:

https://chromium-review.googlesource.com/c/chromium/src/+/598536

ClusterFuzz has detected this issue as fixed in range 499220:499237.

Detailed report: https://clusterfuzz.com/testcase?key=5490157917831168

Fuzzer: inferno_webbot
Job Type: linux_asan_chrome_mp
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  webview()->MainFrame()->IsWebLocalFrame() in render_view_impl.cc
  content::RenderViewImpl::OnSetFocus
  content::QueuedClosure::Dispatch
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_mp&range=498846:498884
Fixed: https://clusterfuzz.com/revisions?job=linux_asan_chrome_mp&range=499220:499237

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=5490157917831168

Additional requirements: Requires Gestures

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 5490157917831168 is verified as fixed, so closing issue as verified.

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