chromium/third_party/blink/web_tests/external/wpt/html/semantics/embedded-content/media-elements/track/track-element/track-webvtt-no-timings.html

<!DOCTYPE html>
<title>Cue without timings are ignored</title>
<script src="track-helpers.js"></script>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<video>
    <track src="resources/no-timings.vtt" default>
    <script>
        async_test(function(t) {
            var track = document.querySelector("track");

            track.onload = t.step_func_done(function() {
                assert_cues_equal(track.track.cues, []);
            });
        });
    </script>
</video>