Sheriff-o-Matic: Convert some more ui tests to mocha

Tools/GardeningServer/ui/ct-embedded-flakiness-dashboard-tests.html

-<!--
-Copyright 2014 The Chromium Authors. All rights reserved.
-Use of this source code is governed by a BSD-style license that can be
-found in the LICENSE file.
--->
-
-<link rel="import" href="ct-embedded-flakiness-dashboard.html">
-
-<script>
-(function() {
-
-module("ct-embedded-flakiness-dashboard");
-
-asyncTest("url", 1, function() {
-  var failure = new CTFailure('foo_tests', 'foo/bar.html');
-  var tree = "blink";
-  var embeddedFlakinessDashboard = document.createElement('ct-embedded-flakiness-dashboard');
-
-  embeddedFlakinessDashboard.test = failure;
-  embeddedFlakinessDashboard.tree = tree;
-
-  requestAnimationFrame(function() {
-    var iframe = embeddedFlakinessDashboard.shadowRoot.querySelector('#iframe');
-    equal(iframe.src, failure.embeddedFlakinessDashboardURL(tree));
-    start();
-  });
-});
-
-asyncTest("heightChanged", 1, function() {
-  var embeddedFlakinessDashboard = document.createElement('ct-embedded-flakiness-dashboard');
-
-  function finishTest() {
-    window.removeEventListener('message', finishTest);
-    var iframe = embeddedFlakinessDashboard.shadowRoot.querySelector('#iframe');
-    equal(iframe.style.height, "100px");
-    start();
-  }
-  window.addEventListener('message', finishTest);
-
-  requestAnimationFrame(function() {
-    window.postMessage({command: 'heightChanged', height: "100"}, '*');
-  });
-});
-
-})()
-</script>