From code search on the file "synthetic_gesture_target_base.cc", suspecting the below.
Review-Url: https://codereview.chromium.org/2573073003
dtapuska@: Could you please take a look into this if its related to your change.

Lan please investigate.

Sure, I will take a look.

ClusterFuzz has detected this issue as fixed in range 476474:476505.

Detailed report: https://clusterfuzz.com/testcase?key=4611852119310336

Fuzzer: inferno_twister
Job Type: linux_ubsan_vptr_content_shell_drt
Platform Id: linux

Crash Type: CHECK failure
Crash Address: 
Crash State:
  web_touch.touches[i].state != WebTouchPoint::StatePressed || PointIsWithinConten
  content::SyntheticGestureTargetBase::DispatchInputEventToPlatform
  content::SyntheticTouchDriver::DispatchEvent
  
Sanitizer: undefined (UBSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=453204:453213
Fixed: https://clusterfuzz.com/revisions?job=linux_ubsan_vptr_content_shell_drt&range=476474:476505

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=4611852119310336


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 4611852119310336 is verified as fixed, so closing issue.

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