Multiple media/*-require-user-gesture.html layout tests are flaky.

[Matt Lewis]

The following Layout tests are flaky on iOS Simulators and macOS

LayoutTests/media/video-play-require-user-gesture.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Fvideo-play-audio-require-user-gesture.html

LayoutTests/media/video-play-audio-require-user-gesture.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Fvideo-play-audio-require-user-gesture.html

LayoutTests/media/video-play-require-user-gesture.html
https://webkit-test-results.webkit.org/dashboards/flakiness_dashboard.html#showAllRuns=true&tests=media%2Fvideo-trackmenu-selection.html

The test generally fail together.

sample diff:
--- /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/media/video-play-audio-require-user-gesture-expected.txt
+++ /Volumes/Data/slave/sierra-release-tests-wk2/build/layout-test-results/media/video-play-audio-require-user-gesture-actual.txt
@@ -9,10 +9,6 @@
 EXPECTED (video.paused == 'true') OK
 
 * User gesture initiated
-EVENT(playing)
-RUN(video.pause())
-EVENT(pause)
-EXPECTED (video.paused == 'true') OK
-RUN(video.webkitEnterFullScreen())
+undefined FAIL
 END OF TEST
 

all diffs have the undefined FAIL at some point in the output

https://build.webkit.org/results/Apple%20Sierra%20Release%20WK2%20(Tests)/r229100%20(7878)/results.html
https://build.webkit.org/builders/Apple%20Sierra%20Release%20WK2%20(Tests)/builds/7878

[Ryan Haddad]

This is still happening.

[Dawei Fenton (:realdawei)]

Update TestExpectations to reflect the two tests that have proven to be flaky. They generally fail together.

media/video-play-audio-require-user-gesture.html 
media/video-play-require-user-gesture.html 

https://build.webkit.org/builders/Apple%20Sierra%20Release%20WK2%20(Tests)/builds/9549/steps/layout-test/logs/stdio

Regressions: Unexpected text-only failures (3)
  media/video-play-audio-require-user-gesture.html [ Failure ]
  media/video-play-require-user-gesture.html [ Failure ]
  media/video-trackmenu-selection.html [ Failure ]

[Dawei Fenton (:realdawei)]

Created attachment 341492 [details]
Patch

[Ryan Haddad]

*** This bug has been marked as a duplicate of bug 185962 ***