is a flakey timeout in macOS.
TIMEOUT DIFF TEXT:
-This test runs the WebGL Test listed below in an iframe and reports PASS or FAIL.
+#PID UNRESPONSIVE - WebKitTestRunner (pid 88833)
+FAIL: Timed out waiting for notifyDone to be called
-[ PASS ] All tests passed
First timeout occurred at r274936. Before that, the test was consistently passing over 2800 revisions back.
The timeouts have most frequently occurred on BigSur Debug wk2, but have happened elsewhere too.
The test appears to be very flakey, and rarely has a timeout, but it has occurred a few times across different OS versions. I tried to reproduce the timeout multiple different ways, but was unable to.
Updated test expectations to Pass Timeout here: