Apply object updates from the network without blowing away object identity or UI attributes.

Tools/GardeningServer/model/test/ct-failures-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-failures.html">
 
 <script>
 (function () {
@@ skipping 18 matching lines @@
   });
 
   describe('failureByTreeListComparator', function() {
     it('should compare failures correctly', function() {
       var analyzer = new CTFailures(new CTCommitList(undefined, []));
 
       var cl1 = new CTCommitList(undefined, ['chromium:1', 'blink:2']);
       var cl2 = new CTCommitList(undefined, ['chromium:2', 'blink:1']);
       var cl3 = new CTCommitList(undefined, ['chromium:2', 'blink:2']);
       var cl4 = new CTCommitList(undefined, []);
-      var group1 = new CTFailureGroup([], cl1);
-      var group2 = new CTFailureGroup([], cl2);
-      var group3 = new CTFailureGroup([], cl3);
-      var group4 = new CTFailureGroup([], cl4);
+      var group1 = new CTFailureGroup('', [], cl1);
+      var group2 = new CTFailureGroup('', [], cl2);
+      var group3 = new CTFailureGroup('', [], cl3);
+      var group4 = new CTFailureGroup('', [], cl4);
 
       // Sort by last revision first.
       assert(analyzer._failureByTreeListComparator('chromium', group1, group2) > 0);
       assert(analyzer._failureByTreeListComparator('chromium', group2, group1) < 0);
       assert(analyzer._failureByTreeListComparator('chromium', group1, group1) == 0);
 
       // If the tree revisions are equal, take others.
       assert(analyzer._failureByTreeListComparator('chromium', group2, group3) > 0);
 
       // Prioritize the given tree.
       assert(analyzer._failureByTreeListComparator('chromium', group1, group2) > 0);
       assert(analyzer._failureByTreeListComparator('blink', group1, group2) < 0);
 
       // Default to 'chromium'.
       assert(analyzer._failureByTreeListComparator(undefined, group1, group2) > 0);
 
       // Failures without a revision go to the end.
       assert(analyzer._failureByTreeListComparator('chromium', group4, group1) > 0);
     });
   });
 });
 
 })()
 </script>