Fix exceptions when running the tests.

Tools/GardeningServer/ui/ct-results-detail.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-results-comparison.html">
 
 <polymer-element name="ct-results-detail" attributes="test builder result">
   <template>
@@ skipping 36 matching lines @@
         result: '_update',
         test: '_update',
         builder: '_update',
       },
 
       _update: function() {
         if (!this.test || !this.builder || !this.result)
           return;
 
         var failureInfo = results.failureInfo(this.test, this.builder, this.result);
+        // FIXME: Move this logic to a proper model class so that the network requests this makes
+        // can be easily mocked out in tests.
         results.fetchResultsURLs(failureInfo).then(function(resultsUrls) {
           var resultsUrlsByTypeAndKind = {};
           resultsUrls.forEach(function(url) {
               var resultType = results.resultType(url);
               if (!resultsUrlsByTypeAndKind[resultType])
                   resultsUrlsByTypeAndKind[resultType] = {};
               resultsUrlsByTypeAndKind[resultType][results.resultKind(url)] = url;
           });
 
           this._urlGroups = [];
           Object.keys(resultsUrlsByTypeAndKind, function(resultType, resultsUrlsByKind) {
             this._urlGroups.push({
               type: resultType,
               urls: resultsUrlsByKind,
             });
           }.bind(this));
         }.bind(this));
       },
     });
   </script>
 </polymer-element>