fixes #221, initial sync*, async, async* implementation

test/js_test_tools/htmltest.js

-/**
- * @license
- * Copyright (c) 2014 The Polymer Project Authors. All rights reserved.
- * This code may only be used under the BSD style license found at http://polymer.github.io/LICENSE.txt
- * The complete set of authors may be found at http://polymer.github.io/AUTHORS.txt
- * The complete set of contributors may be found at http://polymer.github.io/CONTRIBUTORS.txt
- * Code distributed by Google as part of the polymer project is also
- * subject to an additional IP rights grant found at http://polymer.github.io/PATENTS.txt
- */
-
-// if standalone
-if (window.top === window) {
-  // if standalone
-  var failed = false;
-  window.done = function() {
-    window.onerror = null;
-    if (!failed) {
-      var d = document.createElement('pre');
-      d.style.cssText = 'padding: 6px; background-color: lightgreen;';
-      d.textContent = 'Passed';
-      document.body.appendChild(d);
-    }
-  };
-  window.onerror = function(x) {
-    failed = true;
-    var d = document.createElement('pre');
-    d.style.cssText = 'padding: 6px; background-color: #FFE0E0;';
-    d.textContent = 'FAILED: ' + x;
-    document.body.appendChild(d);
-  };
-} else
-// if part of a test suite
-{
-  window.done = function() {
-    window.onerror = null;
-    parent.postMessage('ok', '*');
-  };
-
-  window.onerror = function(x) {
-    parent.postMessage({error: x}, '*');
-  };
-}
-