Codebase Browser
chromium
Go to App

chromium/content/test/data/accessibility/mac/methods/accessibility-custom-content.html 

<!--
@SCRIPT:
  div.accessibilityCustomContent[0].label
  div.accessibilityCustomContent[0].value
  not_applicable.accessibilityCustomContent
-->
<!DOCTYPE html>
<html>
<body>
  <div id="div" aria-label="description" aria-description="Text-description"></div>
  <div id="not_applicable"></div>
</body>
</html>