Sort the failure names in sheriff-o-matic.

Tools/GardeningServer/ui/ct-failure-card-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-failure-card.html">
 
 <script>
 (function () {
 
 module("ct-failure-card");
 
+test("testNames", 1, function() {
+  var card = document.createElement('ct-failure-card');
+  // FIXME: Use a proper model class instead of a dumb object.
+  var failures = [
+    {testName: 'foo'},
+    {testName: 'bar'},
+    {testName: 'baz'},
+  ];
+  deepEqual(card.testNames(failures), ['bar', 'baz', 'foo']);
+});
+
 asyncTest("examine", 1, function() {
   var card = document.createElement('ct-failure-card');
   card.failures = [];
 
   Platform.endOfMicrotask(function() {
     card.addEventListener('ct-examine-failures', function(event) {
       deepEqual(event.detail, []);
       start();
     });
 
     card.shadowRoot.getElementById('examine').dispatchEvent(new CustomEvent('tap'));
   });
 });
 
 })()
 </script>