Disable registered-neutral-keyframe.html

TBR=kevers@chromium.org

Bug: 1098371
Change-Id: Icecf1008037f27ddf37deccf6f0943a0a3d4c587
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2260855Reviewed-by: Chris Sharp <csharp@chromium.org>
Commit-Queue: Chris Sharp <csharp@chromium.org>
Cr-Commit-Position: refs/heads/master@{#781435}

third_party/blink/web_tests/TestExpectations

@@ -6862,4 +6862,5 @@ crbug.com/1098067 [ Fuchsia ] virtual/text-antialias/bidi-isolate-nextlinebreak-
 
 # Sheriff 2020-06-23
 crbug.com/1098136 [ Linux ] virtual/android/fullscreen/video-fixed-background.html [ Failure ]
-crbug.com/1025944 [ Linux ] external/wpt/pointerevents/pointerlock/pointerevent_pointermove_on_chorded_mouse_button_when_locked.html [ Pass Failure ]
+crbug.com/1025944 [ Linux ] external/wpt/pointerevents/pointerlock/pointerevent_pointermove_on_chorded_mouse_button_when_locked.html [ Pass Failure ]
\ No newline at end of file
+crbug.com/1098371 [ Linux ] virtual/threaded-no-composited-antialiasing/animations/custom-properties/registered-neutral-keyframe.html [ Pass Crash Failure ]