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chromium/third_party/blink/web_tests/fast/forms/resources/popup-no-crash.html 

<!DOCTYPE html>
<html>
<script src="../../../resources/js-test.js"></script>
<script>
description("Check that first disconnecting then closing a page popup does not crash.");
testPassed("no crash");

testRunner.notifyDone();
</script>
</html>