This test is flaky timing out on iOS wk2. The flaky timeouts are apparent throughout the visible history.
I am not able to locate a diff.
I have marked this test as timing out while this issue is investigated.
I can reproduce this issue using r258908 with the command below.
run-webkit-tests --iterations 777 --child-processes 50 --force -f http/tests/cache/disk-cache/disk-cache-vary-cookie-private.html
[704/777] http/tests/cache/disk-cache/disk-cache-vary-cookie-private.html failed unexpectedly (test timed out, test was not run)