chromium/tools/perf/page_sets/tough_canvas_cases/canvas2d_balls_common/bouncing_balls.html

<!DOCTYPE html>
<html lang="en">
<head>
  <script src="parse_url.js"></script>
  <script src="bouncing_balls.js"></script>
  <style>
    html, body {
      width:  100%;
      height: 100%;
      margin: 0px;
      padding: 0px;
      overflow: hidden;
    }
  </style>
  <meta http-equiv="Content-Type" content="text/html; charset=UTF-8">
  <title>Canvas 2D frame rate test: bouncing balls</title>
</head>    
<body>

<canvas id="canvas" width="500" height="500">
</canvas>
<img id="ballImage" src="chromium.png" height="0" width="0"></img>
<img id="backImage" src="kiddie_logo.png" height="0" width="0"></img>
<script>
  var canvas = document.getElementById('canvas');
  var canvasContext = canvas.getContext('2d');
</script>
</body>
</html>