  // but isn't actually relevant to what we're testing here.
    parent.postMessage({ type: "http", error: true }, "*");
  }

  try {
    var w2 = new Worker(https_dir + "support/dedicated-worker-script.js");
    w2.onmessage = function(e) {
      parent.postMessage({ type: "https", error: false,
                           isSecureContext: e.data }, "*");
    };
    w2.onerror = function(e) {
      parent.postMessage({ type: "https", error: true }, "*");
    }
  } catch (e) {
    // Some browsers throw for 