This issue started after https://trac.webkit.org/changeset/264564/webkit .
Diff link (https://build.webkit.org/results/Apple%20iPadOS%2013%20Simulator%20Debug%20WK2%20(Tests)/r264751%20(2920)/imported/w3c/web-platform-tests/web-share/share-without-user-gesture.https-diff.txt) results in 'No Such Resource File not found.'
I have marked this test as timeout while this issue is investigated.
Issue does not seem caused by the test itself:
TestController::platformResetPreferencesToConsistentValues - Failed to remove presented view controller
#PROCESS UNRESPONSIVE - com.apple.WebKit.WebContent.Development (pid 19216)
Switched the flaky timeout expectation to a skip in rr264798
Created attachment 405089 [details]
Created attachment 405102 [details]
(In reply to Chris Dumez from comment #6)
> Created attachment 405102 [details]
Improved fix after talking to our Web Share expert (Tim Horton).
Found 4 new test failures: fast/web-share/share-transient-activation.html, fast/web-share/share-with-files.html, fast/web-share/share-with-no-url.html, fast/web-share/share.html
Created attachment 405148 [details]
Committed r264834: <https://trac.webkit.org/changeset/264834>
All reviewed patches have been landed. Closing bug and clearing flags on attachment 405148 [details].