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chromium/content/test/data/accessibility/accname/name-checkbox-label-with-input.html 

<!--
@BLINK-DENY:descri*
-->
<!doctype html>
<html>
<body>
<input type="checkbox" id="test">
<label for="test">foo<input type="text" value="bar">baz</label>
</body>
</html>