Fix exceptions when running the tests.

Tools/GardeningServer/scripts/treestatus_unittests.js

 /*
  * Copyright (C) 2013 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
  *    notice, this list of conditions and the following disclaimer in the
@@ skipping 31 matching lines @@
     "can_commit_freely": false,
     "general_state": "closed"
 };
 
 test('urlByName', 3, function() {
     equal(treestatus.urlByName('blink'), 'http://blink-status.appspot.com/current?format=json');
     equal(treestatus.urlByName('chromium'), 'http://chromium-status.appspot.com/current?format=json');
     equal(treestatus.urlByName('foo'), null);
 });
 
-asyncTest('fetchTreeStatus', 4, function() {
+asyncTest('fetchTreeStatus', 3, function() {
     var simulator = new NetworkSimulator();
 
     simulator.json = function(url)
     {
         if (url.indexOf('closed') != -1)
             return Promise.resolve(closedTreeJson);
         else
             return Promise.resolve(openTreeJson);
     };
 
     var span = document.createElement('span');
     simulator.runTest(function() {
         treestatus.fetchTreeStatus('http://opentree', span)
             .then(function(result) {
                 equal(span.textContent, 'OPEN');
 
                 span = document.createElement('span');
-                simulator.runTest(function() {
-                    treestatus.fetchTreeStatus('http://closedtree', span)
-                        .then(function() {
-                            equal(span.textContent, 'Tree is closed by ojan@chromium.org');
-                            start();
-                        });
-                });
+                treestatus.fetchTreeStatus('http://closedtree', span)
+                    .then(function() {
+                        equal(span.textContent, 'Tree is closed by ojan@chromium.org');
+                        start();
+                    });
             });
     });
 });
 
 })();