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chromium/third_party/blink/web_tests/fast/table/remove-td-display-none.html 

<html>
<head>
<title>Add/remove "display: none" to table elements (bug 3702)</title>
<style type="text/css">
.navbar{display: none;}
</style>
</head>
<body onLoad="javascript:document.styleSheets[0].deleteRule(0);">
<p>Both rows should have the same width (725px).</p>
<table cellpadding="0" cellspacing="0" style="table-layout: fixed; width: 725px;">
    <tr id='first_row'>
        <td class="navbar" style="background-color: LawnGreen;">1</td>
        <td style="background-color: Green;">1+</td>
        <td class="navbar" style="background-color: Cyan;">2</td>
        <td style="background-color: DarkCyan;">2+</td>
        <td class="navbar" style="background-color: Yellow;">3</td>
        <td style="background-color: Gold;">3+</td>
        <td class="navbar" style="background-color: Orange;">4</td>
        <td style="background-color: DarkOrange;">4+</td>
    </tr>
    <tr valign="top">
        <td>&nbsp;</td>
    </tr>
</table>
<table cellpadding="0" cellspacing="0" style="table-layout: fixed; width: 725px;">
    <tr>
        <td style="background-color: LawnGreen;">1</td>
        <td style="background-color: Cyan;">2</td>
        <td style="background-color: Yellow;">3</td>
        <td style="background-color: Orange;">4</td>
    </tr>
</table>
<button onClick="javascript:document.styleSheets[0].deleteRule(0);">show</button>
<button onClick="javascript:document.styleSheets[0].insertRule('.navbar {display: none;}', 0);">hide</button>
</body>
</html>