chromium/content/test/data/accessibility/css/pseudo-elements-ignored-parent.html

<!--
@BLINK-ALLOW:className*
-->
<!-- Elements with ::before/::after children are included in the tree -->
<style>
.before::before { content:"["; }
.after::after { content:"]"; }
</style>
<div role="none" class="none">Parent div not included</div>
<div role="none" class="before">Has ::before</div>
<div role="none" class="after">Has ::after</div>