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

Tools/GardeningServer/ui/ct-tree-status-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-tree-status.html">
-
-<script>
-(function () {
-
-module("ct-tree-status");
-
-asyncTest('basic', 5, function() {
-  var openTree = document.createElement("ct-tree-status");
-  var openTreeStatus = new TreeStatus('open-tree-project');
-  openTreeStatus.status = 'open';
-  openTree.status = openTreeStatus;
-
-  var throttledTree = document.createElement("ct-tree-status");
-  var throttledTreeStatus = new TreeStatus('throttled-tree-project');
-  throttledTreeStatus.status = 'throttled';
-  throttledTreeStatus.message = 'Tree is throttled just for fun';
-  throttledTree.status = throttledTreeStatus;
-
-  var closedTree = document.createElement("ct-tree-status");
-  var closedTreeStatus = new TreeStatus('closed-tree-project');
-  closedTreeStatus.status = 'closed';
-  closedTreeStatus.message = 'Tree is closed';
-  closedTree.status = closedTreeStatus;
-
-  var simulator = new NetworkSimulator(ok, start);
-  simulator.runTest(function() {
-    requestAnimationFrame(function() {
-      ok(!openTree.shadowRoot.textContent.has("open-tree-project"));
-      ok(throttledTree.shadowRoot.textContent.has("throttled-tree-project"));
-      ok(closedTree.shadowRoot.textContent.has("closed-tree-project"));
-      equal(closedTree.shadowRoot.querySelector('a').href, closedTreeStatus.url);
-      start();
-    });
-  });
-});
-
-})();
-</script>