from-cross-realm.https.html; don't timeout in Chromium (#47762)
Test streams/readable-streams/crashtests/from-cross-realm.https.html was
timing out in Chromium because ReadableStream.from() is not yet
supported there.
Catch exceptions in the JavaScript to ensure that class "test-wait" is
always removed from the html tag. Also close the opened window as that
seems to be necessary for test completion to be detected in Chrome.