chromium/third_party/blink/web_tests/http/tests/misc/drag-bookmark.html

<!DOCTYPE html>
<script>
'use strict';
if (window.testRunner) {
  testRunner.dumpAsText();
  // notifyDone will be called once we navigate to the "bookmarked" URL that
  // is being dragged below.
  testRunner.waitUntilDone();
}
window.onload = () => {
  // Simulate dragging a bookmark to a cross-site URL.
  const crossSiteURL = "http://localhost:8000/misc/resources/" +
                      "notify-success.html";
  eventSender.beginDragWithStringData(crossSiteURL, "text/uri-list");
  eventSender.mouseMoveTo(10, 10);
  eventSender.mouseUp();
  document.body.appendChild(document.createTextNode('PASS: Dropped bookmark'));

};
</script>