REGRESSION(iOS 14): http/tests/cache-storage/page-cache-domcache-pending-promise.html is a flaky failure

[Hector Lopez]

http/tests/cache-storage/page-cache-domcache-pending-promise.html

Test is a flaky failure according to history on iOS. First occurrence of failure coincide with the start of testing on iOS 14. 

History:

https://results.webkit.org/?suite=layout-tests&test=http%2Ftests%2Fcache-storage%2Fpage-cache-domcache-pending-promise.html&platform=ios

Diff:

--- /Volumes/Data/slave/ios-simulator-14-release-tests-wk2/build/layout-test-results/http/tests/cache-storage/page-cache-domcache-pending-promise-expected.txt
+++ /Volumes/Data/slave/ios-simulator-14-release-tests-wk2/build/layout-test-results/http/tests/cache-storage/page-cache-domcache-pending-promise-actual.txt
@@ -7,8 +7,9 @@
 pagehide - entering cache
 pageshow - from cache
 PASS Page was restored from Page Cache
-PASS Cache.add() succeeded after restoring from the cache
+FAIL Page restored from cache but the promise was not resolved.
 PASS successfullyParsed is true
+Some tests failed.
 
 TEST COMPLETE

[Radar WebKit Bug Importer]

<rdar://problem/70019463>

[Hector Lopez]

Test expectation while investigated:

https://trac.webkit.org/changeset/268078/webkit

[Ryan Haddad]

Added DumpJSConsoleLogInStdErr back to the test expectation with r270992 entry because its removal in r268078 made it fail consistently.

[Ryan Haddad]

It looks like this is passing now.