Simplify failing builder lists.

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">
 
-<polymer-element name="ct-failure-card" attributes="failures builderLatestRevisions commits">
+<polymer-element name="ct-failure-card" attributes="failures commits">
   <template>
     <style>
       :host {
         display: flex;
       }
 
       /* FIXME: All this paper-button styling should go in a cr-button component so that
          we can use buttons in different places and have them all look the same. */
       paper-button {
         -webkit-user-select: none;
@@ skipping 26 matching lines @@
       }
 
       .failure {
         flex: 1;
       }
 
       #examine {
         align-self: flex-start;
       }
     </style>
-    <ct-builder-grid failures="{{failures}}" builderLatestRevisions="{{builderLatestRevisions}}"></ct-builder-grid>
+    <ct-builder-grid failures="{{failures}}"></ct-builder-grid>
     <div class="failure">
       <ct-test-list tests="{{failures|testNames}}"></ct-test-list>
       <ct-commit-list first="{{failures[0].newestPassingRevision + 1}}"
           last="{{failures[0].oldestFailingRevision}}"
           commits="{{commits}}"></ct-commit-list>
     </div>
     <paper-button id="examine" on-tap="{{examine}}">Examine</paper-button>
   </template>
   <script>
     Polymer({
       failures: [],
-      builderLatestRevisions: {},
       commits: {},
 
       testNames: function(failures) {
         return failures.map(function(failureAnalysis) { return failureAnalysis.testName }).sort();
       },
 
       examine: function() {
         this.fire('ct-examine-failures', this.failures);
       },
     });
   </script>
 </polymer-element>