chromium/ui/file_manager/file_manager/foreground/images/files/ui/eject.svg

<svg xmlns="http://www.w3.org/2000/svg" width="20" height="20" viewBox="0 0 20 20">
  <path d="M15 12v2H5v-2h10zm-5-8l5 6H5l5-6z"/>
</svg>