chromium/chrome/test/data/magic_boost/test_input_box.html

<body>
    <form>
        <input type="text" value="Some test text for testing the orca feature" id="INPUT_VIEW">
    </form>
    <script type='text/javascript'>
        function getTextfieldBound() {
            const rect = document.getElementById('INPUT_VIEW').
                getBoundingClientRect();
            return [rect.left, rect.top, rect.right, rect.bottom];
        }
    </script>
</body>