Add Chromium versions for TextTrackList API (#13045)
Add Chromium versions for TextTrackList API (#13045)

This PR adds real values for Chromium (Chrome, Opera, Samsung Internet, WebView Android) for the `TextTrackList` API (specifically, their events), based upon manual testing.

Test Code Used:
```html
<div id="test">
	<video id="video" controls width="250">
		<source src="/queengooborg/static/rabbit320.mp4" type="video/mp4" />
		<!-- https://mdn.github.io/learning-area/html/multimedia-and-embedding/video-and-audio-content/rabbit320.mp4 -->

		<track id="track" kind="captions" src="/queengooborg/static/rabbit320.vtt" srclang="en">
	</video>

	<button id="add">Add track</button>
	<button id="remove">Remove track</button>
</div>

<script>
	var video = document.getElementById('video');
	var textTracks = video.textTracks;

	video.textTracks.addEventListener('addtrack', function() {
		alert("Track added!");
	});
	video.textTracks.addEventListener('change', function() {
		alert("Tracks changed!");
	});
	video.textTracks.addEventListener('removetrack', function() {
		alert("Track removed!");
	});

	function addTrack() {
		video.addTextTrack("captions", "Captions", "es");
	};

	function removeTrack() {
		var track = document.getElementById('track');
		track.parentNode.removeChild(track);
	}

	document.getElementById('add').onclick = addTrack;
	document.getElementById('remove').onclick = removeTrack;
</script>
```
chrisdavidmills/browser-compat-data,mdn/browser-compat-data,chrisdavidmills/browser-compat-data,mdn/browser-compat-data