Third-party extensions using WKWebView are unable to render anything because we do not get notified when the extension's visibility changes. Because we do not recognize the extension showing the WebView to be foreground, we do not take a process assertion on behalf of the child processes and they get suspended before they get a chance to render anything.
Created attachment 370908 [details]
Comment on attachment 370908 [details]
Created attachment 370954 [details]
The commit-queue encountered the following flaky tests while processing attachment 370954 [details]:
fetch/fetch-worker-crash.html bug 187257 (author: email@example.com)
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Comment on attachment 370954 [details]
Clearing flags on attachment: 370954
Committed r245896: <https://trac.webkit.org/changeset/245896>
All reviewed patches have been landed. Closing bug.