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

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/d3fb9e2435e2c3015314496c2afa5bf64c4ace56

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

ClusterFuzz has detected this issue as fixed in range 499964:499992.

Detailed report: https://clusterfuzz.com/testcase?key=6562602649124864

Fuzzer: inferno_twister
Job Type: windows_asan_content_shell
Platform Id: windows

Crash Type: Null-dereference READ
Crash Address: 0x00000010
Crash State:
  blink::AutoscrollController::ScheduleMainThreadAnimation
  blink::AutoscrollController::Animate
  blink::PageWidgetDelegate::Animate
  
Sanitizer: address (ASAN)

Regressed: https://clusterfuzz.com/revisions?job=windows_asan_content_shell&range=481079:481098
Fixed: https://clusterfuzz.com/revisions?job=windows_asan_content_shell&range=499964:499992

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6562602649124864

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 6562602649124864 is verified as fixed, so closing issue as verified.

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