[CompositeAfterPaint] compositing/video/video-controls-layer-creation.html is flaky

TBR=schenney@chromium.org

Bug: 1124979
Change-Id: I6a3de95b6f5c60f7d6fb571240dcce4ef6b980a9
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/src/+/2394725Reviewed-by: Xianzhu Wang <wangxianzhu@chromium.org>
Commit-Queue: Xianzhu Wang <wangxianzhu@chromium.org>
Cr-Commit-Position: refs/heads/master@{#804643}

third_party/blink/web_tests/FlagExpectations/composite-after-paint

@@ -64,3 +64,5 @@ crbug.com/1108972 fullscreen/compositor-touch-hit-rects-fullscreen-video-control
 # Cross-origin iframe layerization is buggy with empty iframes.
 crbug.com/1123189 virtual/threaded-composited-iframes/external/wpt/is-input-pending/security/cross-origin-subframe-masked-pointer-events-mixed-2.sub.html [ Failure ]
 crbug.com/1123189 virtual/threaded-composited-iframes/external/wpt/is-input-pending/security/cross-origin-subframe-complex-clip.sub.html [ Failure ]
+
+crbug.com/1124979 compositing/video/video-controls-layer-creation.html [ Pass Failure ]