Sort the failure names in sheriff-o-matic.

Tools/GardeningServer/ui/ct-failure-card.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-builder-grid.html">
 <link rel="import" href="ct-commit-list.html">
 <link rel="import" href="ct-test-list.html">
 
@@ skipping 20 matching lines @@
     </div>
     <div>
       <paper-button id="examine" on-tap="{{examine}}">Examine</paper-button>
     </div>
   </template>
   <script>
     Polymer({
       failures: [],
 
       testNames: function(failures) {
-        return failures.map(function(failureAnalysis) { return failureAnalysis.testName });
+        return failures.map(function(failureAnalysis) { return failureAnalysis.testName }).sort();
       },
 
       examine: function() {
         this.fire('ct-examine-failures', this.failures);
       },
     });
   </script>
 </polymer-element>