Predator and CL did not provide any possible suspects.
Using Code Search for the file, "PointerLockController.cpp" assigning to the concern owner.
Suspecting Commit#
https://chromium.googlesource.com/chromium/src/+/6a0ddfbef3bfb61f2de91026ac1e749172917210

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

 Issue 712936  has been merged into this issue.

ClusterFuzz has detected this issue as fixed in range 465765:465806.

Detailed report: https://clusterfuzz.com/testcase?key=5133621079048192

Fuzzer: ifratric-browserfuzzer-v3
Job Type: windows_syzyasan_chrome
Platform Id: windows

Crash Type: UNKNOWN
Crash Address: 0x00000013
Crash State:
  blink::Node::dispatchMouseEvent
  blink::PointerLockController::dispatchLockedMouseEvent
  blink::WebFrameWidgetBase::pointerLockMouseEvent
  
Memory Tool: SYZYASAN

Regressed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=368281:368302
Fixed: https://clusterfuzz.com/revisions?job=windows_syzyasan_chrome&range=465765:465806

Reproducer Testcase: https://clusterfuzz.com/download/AMIfv94N2L9TUhKY1MDS811FpdmR4xxI2V0bxENjARWi1eA7Ifxc2nCOxUYUJoVMrC6oceMO6WX9KMSYGukIJ3iX9XCd4HSL5vx74BTNLNL5Bc3vpV8etBtMrs4lP12UjObddlMypMPsanm4pV1ZaXlM8wswd-izGevb4hMnqw3c8PFxY7egGe0kDzZzV8Z7U2W8wvly5gt_oPXX3G1gqAx8pGZE-v4aySm0WdF7XZ3pRqGgr2UIqFvL8d2HGBZ64KQ3CXTMPHYVpJdxmnHuGUAdb6pmd15IIQZCjvWRM2L2By1B7xRhaCFiXixEDmYKsRtJjLeSVYlUE4cKTbWvM1a0bwyS-XpIQ4c22sCne-aBOpUzhXToYlzje74-N14PY-6eTJ2jBfEM2NrS7Mg5Yxe7AJoEirx6gA?testcase_id=5133621079048192


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 5133621079048192 is verified as fixed, so closing issue.

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