Find it and CL did not provide any possible suspects.
Using Code Search for the file, "system_menu_model_builder.cc" assigning to the concern owner --

Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/bc19dbb8c8a64decb28d4abc5cefaf74d246ab1c

@alemate -- 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 465765:465806.

Detailed report: https://clusterfuzz.com/testcase?key=5997681047764992

Fuzzer: meacer_extension_apis
Job Type: windows_syzyasan_chrome
Platform Id: windows

Crash Type: UNKNOWN
Crash Address: 0x00000003
Crash State:
  IsChromeSettingsAppOrPopupWindow
  SystemMenuModelBuilder::BuildSystemMenuForAppOrPopupWindow
  SystemMenuModelBuilder::BuildMenu
  
Memory Tool: SYZYASAN

Regressed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=441510:441524
Fixed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=465765:465806

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94uuxSoleShTm1HIDVHDR9GSXvjiJt20jnIKRU7SzbJpQROmt3mYR2f7DTjuMyv6CSaRwsihw_ZS_sH2jWyyQyTYxD2EMRsERHCfgCBCabqRZqjYEuDPnpHeO_c3_goAJ3McUEWzlWlER5hGoCsHz3Lwf2QmY-WM8_e-0SEtc-JROk1QvDwWQe8SyLMyvTVc6xceIC6Mq3TKe1aRnZnKhjaPLMkB9RtrwbYKRg9xxxgugBYr3z0_y-WC1jJdDSuaWb5QZKdsZMH4FErAIuKee3a_JfrBPiu2MF1R0qthX-6BJcK7ThOsClbdK9C85iBpyYZD5Ks60ISv1TBr-p3GNfXiriM-17ftfAxo_3CB980C48sSoc?testcase_id=5997681047764992


Additional requirements: Requires Gestures

See https://dev.chromium.org/Home/chromium-security/bugs/reproducing-clusterfuzz-bugs 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 5997681047764992 is verified as fixed, so closing issue.

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