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chromium/third_party/blink/web_tests/fast/scrolling/keyboard-scroll-before-layout.html 

<!DOCTYPE html>
<html hidden="">
<script src="../../resources/testharness.js"></script>
<script src="../../resources/testharnessreport.js"></script>
<script>
  test(() => {
    eventSender.keyDown(' ', []);
  }, "Test that keyboard scroll without a layout tree doesn't crash");
</script>
</html>