Automatically applying components based on crash stacktrace and information from OWNERS files.

If this is incorrect, please apply the Test-Predator-Wrong-Components label.

Automatically assigning owner based on suspected regression changelist https://chromium.googlesource.com/chromium/src/+/183dcec54bb0e630814f54638a0d862da7315029 (Don't dispatch an event in DispatchEventToAOMEventListeners if event's target is null).

If this is incorrect, please let us know why and apply the Test-Predator-Wrong-CLs label. If you aren't the correct owner for this issue, please unassign yourself as soon as possible so it can be re-triaged.

The following revision refers to this bug:
  https://chromium.googlesource.com/chromium/src.git/+/2ed9605b4c99774d8865dbd190e13c9fe5c2d03a

commit 2ed9605b4c99774d8865dbd190e13c9fe5c2d03a
Author: Hayato Ito <hayato@chromium.org>
Date: Fri Nov 09 17:31:43 2018

Fix a bug in https://crrev.com/c/1272937, where event.target can be still null

Fix a bug in the previous CL, https://crrev.com/c/1272937, where event.target
can be null when GetElement() returns nullptr.

Bug:  892970 ,  893449 ,  902287 
Change-Id: I7a08227d39117c2dc90fe720f0d6ffd62d9b2ea6
Reviewed-on: https://chromium-review.googlesource.com/c/1322177
Commit-Queue: Dominic Mazzoni <dmazzoni@chromium.org>
Reviewed-by: Dominic Mazzoni <dmazzoni@chromium.org>
Cr-Commit-Position: refs/heads/master@{#606884}
[modify] https://crrev.com/2ed9605b4c99774d8865dbd190e13c9fe5c2d03a/third_party/blink/renderer/modules/accessibility/ax_object.cc

ClusterFuzz has detected this issue as fixed in range 606873:606888.

Detailed report: https://clusterfuzz.com/testcase?key=6294885499666432

Fuzzer: inferno_layout_test_unmodified
Job Type: linux_msan_content_shell_drt
Platform Id: linux

Crash Type: Null-dereference READ
Crash Address: 0x000000000000
Crash State:
  blink::JSBasedEventListener::handleEvent
  blink::EventTarget::FireEventListeners
  blink::EventTarget::FireEventListeners
  
Sanitizer: memory (MSAN)

Regressed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=605243:605244
Fixed: https://clusterfuzz.com/revisions?job=linux_msan_content_shell_drt&range=606873:606888

Reproducer Testcase: https://clusterfuzz.com/download?testcase_id=6294885499666432

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 6294885499666432 is verified as fixed, so closing issue as verified.

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