chromium/tools/perf/page_sets/image_decoding_cases/webp_decoding.html

<!DOCTYPE html>
<html>
    <head>
        <meta http-equiv="Content-Type" content="text/html; charset=ISO-8859-1">
        <title>WebP image decoding</title>
        <script src="decoding_story_helpers.js"></script>
        <script src="webp_squares_base64.js"></script>
    </head>

    <body>
        <img id="img">
        <script>
            var numSquares = webp_squares_base64.length;
            drawColorfulSquares(numSquares, webp_squares_base64);
        </script>
    </body>
</html>