chromium/third_party/blink/web_tests/external/wpt/workers/constructors/Worker/Blob-url.html

<!DOCTYPE html>
<meta charset="utf-8">
<title>Web Workers: Worker - Blob url</title>
<link rel="author" title="Intel" href="http://www.intel.com">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<div id="log"></div>
<script>

  async_test(function(t) {
    var blob = new Blob(["onmessage = function(event) { postMessage(event.data); }"], {type: "text/plain"});
    var worker = new Worker(window.URL.createObjectURL(blob));
    var data = "Blob URL";
    worker.postMessage(data);
    worker.onmessage = t.step_func(function(event) {
      assert_equals(event.data, data, "event.data");
      t.done();
    });
  }, "Worker supports Blob url");

</script>