chromium/chrome/test/data/device_id/test.html

<!--
    Copyright 2023 The Chromium Authors
    Use of this source code is governed by a BSD-style license that can be
    found in the LICENSE file.
-->

<html>
    <head>
        <!-- Centralizes the canvas element in the middle of the frame. -->
        <style type="text/css">
            .canvas {
                display: block;
                width: 100%;
                height: 100%;
                position: absolute;
                outline-style: solid;
                outline-width: 4px;
                outline-color: red;
                outline-offset: -4px;
                top: 0;
                bottom: 0;
                left: 0;
                right: 0;
            }
        </style>
    </head>
    <body onload="init()">
        <canvas id="test_canvas" class="canvas" ></canvas>
    </body>
</html>