chromium/content/test/data/accessibility/html/input-radio-checkbox-label.html

<!--
@AURALINUX-DENY:checkable
-->
<!DOCTYPE html>
<html>
<body>
  <body>
    <!-- When the radio button's associated label is not set to be
      focusable, it will be ignored from the accessibility tree. -->
    <label for="radio1">
      label ignored for radio button
      <input type="radio" id="radio1">
    </label>

    <!-- When the checkbox's associated label is not set to be
      focusable, it will be ignored from the accessibility tree. -->
    <label for="checkbox1">
      label ignored for checkbox
      <input type="checkbox" id="checkbox1">
    </label>

    <!-- When the radio button's associated label is set to be focusable,
      it will be included in the accessibility tree. -->
    <label for="radio2" tabindex="0">
      label exposed for radio button
      <input type="radio" id="radio2" tabindex="-1">
    </label>

    <!-- When the checkbox's associated label is set to be focusable,
      it will be included in the accessibility tree. -->
    <label for="checkbox2" tabindex="0">
      label exposed for checkbox
      <input type="checkbox" id="checkbox2" tabindex="-1">
    </label>
  </body>
</html>