chromium/tools/perf/page_sets/webrtc_cases/canvas-capture.html

<!DOCTYPE html>
<!--
 *  Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
 *
 *  Use of this source code is governed by a BSD-style license
 *  that can be found in the LICENSE file in the root of the source
 *  tree.
-->
<html><head>
  <title>Canvas capture stream to peerConnection</title>
</head>
<body>
  <div id="container">
    <h1>Canvas capture stream to peerConnection</h1>

    <canvas id="canvas" width="32" height="24"></canvas>
    <video id="remoteVideo" width="32" height="24" autoplay=""></video>

    <div>
      <button id="startButton" class="green">Start test</button>
    </div>
  </div>


<script src="canvas-capture.js"></script>
</body></html>