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chromium/third_party/blink/web_tests/external/wpt/html/semantics/links/links-created-by-a-and-area-elements/support/noopener-target-2.html 

<!DOCTYPE html>
<script>
  var channel = new BroadcastChannel(this.name);
  channel.postMessage({ hasOpener: opener !== null ,
                        hasParent: parent != this,
                        name: window.name });
  window.close();
</script>