Try this:
<script src="https://embed.twitch.tv/embed/v1.js"></script>
<div id="test"></div>
<script type="text/javascript">
var parent = ['sites.google.com', 'www.gstatic.com', 'plus.destructomc.com', window.location.host];
var options = {
width: 720,
height: 1280,
channel: "destructolive",
allowfullscreen: true,
layout: "video-with-chat",
muted: true,
parent
};
var player = new Twitch.Embed("test", options);
</script>
Google threw an extra iframe into the stack