(r278359) fast/mediastream/mediaElement-gc.html is a flaky failure

[Truitt Savell]

fast/mediastream/mediaElement-gc.html

this test has been a flaky failure on Mac and iOS sense introduction in https://trac.webkit.org/changeset/278359/webkit 

History;
https://results.webkit.org/?suite=layout-tests&test=fast%2Fmediastream%2FmediaElement-gc.html

Diff:
--- /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/fast/mediastream/mediaElement-gc-expected.txt
+++ /Volumes/Data/worker/bigsur-debug-tests-wk2/build/layout-test-results/fast/mediastream/mediaElement-gc-actual.txt
@@ -1,4 +1,4 @@
 
 PASS Keep alive a video element with a live srcObject
-PASS GC a video element with a live srcObject, then srcObject set to null
+FAIL GC a video element with a live srcObject, then srcObject set to null assert_equals: expected 1 but got 2

[Radar WebKit Bug Importer]

<rdar://problem/79309901>

[Truitt Savell]

We should revert this change if it isn't fixed quickly

[youenn fablet]

Test passes consistently for release, but fails very often in debug.
I guess could restrict to release, or do several GC to get the expected result.

[youenn fablet]

Created attachment 431413 [details]
Patch

[EWS]

Committed r278874 (238818@main): <https://commits.webkit.org/238818@main>

All reviewed patches have been landed. Closing bug and clearing flags on attachment 431413 [details].