chromium/third_party/blink/manual_tests/textarea-focus.html

<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
        "http://www.w3.org/TR/html4/strict.dtd">
<html lang="en">
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<style type="text/css">
    textarea { background: red; }
    textarea:focus { background: green; }
</style>
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<p><b>BUG ID:</b> <a href="http://bugs.webkit.org/show_bug.cgi?id=8324">Bugzilla bug 8324</a> REGRESSION: textarea :focus not applied immediately</p>

<p id="test" style="background-color:skyblue; padding:3px;"><b>STEPS TO TEST:</b> 
Click in the red text area below.
</p>

<p id="success" style="background-color:palegreen; padding:3px;"><b>TEST PASS:</b> 
The text area&rsquo;s background will change from red to green.
</p>

<p id="failure" style="background-color:#FF3300; padding:3px;"><b>TEST FAIL:</b>  
The text area will not change to green. Only switching to another window and back to this window
will change it to green.
</p>

<textarea rows="8" cols="40"></textarea>

</body>
</html>