[Sheriff-o-matic] Use likely_revisions instead of first_failing/last_passing

Tools/GardeningServer/ui/test/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">
 
 <link rel="import" href="../../model/ct-commit-log-mock.html">
 <link rel="import" href="../../model/ct-failure-group.html">
 
 <script>
 (function () {
 
 var assert = chai.assert;
 
 describe('ct-failure-card', function() {
   var group;
   var card;
 
   beforeEach(function(done) {
     card = document.createElement('ct-failure-card');
     group = new CTFailureGroup('key', [
-        new CTFailure('autobot', 'unknown', {}, {'blink':158547},
-                      {'blink':158544})]);
+        new CTFailure('autobot', 'unknown', {})], ['blink:158544', 'blink:158545']);
     card.group = group;
     card.commitLog = new CTCommitLogMock();
     setTimeout(done);
   });
 
   describe('failure card UI', function() {
 
     it('should have commit summaries', function(done) {
       // Expand the first repository so that the <ct-commit>'s are generated.
       card._commitList.repositories[0].expanded = true;
 
       setTimeout(function() {
         var list = card.shadowRoot.querySelector('ct-commit-list');
         var commits = list.shadowRoot.querySelectorAll('ct-commit');
-        assert(commits[0].data);
-        assert(commits[0].data.summary);
+        assert(commits[1].data);
+        assert(commits[1].data.summary);
         done();
       });
     });
 
     it('removing a commit summary', function(done) {
       card.commitLog.commits['blink']['158545'].summary = undefined;
       card._commitList.repositories[0].expanded = true;
 
       setTimeout(function() {
         var list = card.shadowRoot.querySelector('ct-commit-list');
@@ skipping 75 matching lines @@
           done();
         });
       });
     });
   });
 
 });
 
 })()
 </script>