Take two at fixing duplicate alert failures.

Tools/GardeningServer/model/test/ct-step-failure-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-step-failure.html">
 
 <script>
 (function () {
 
 var assert = chai.assert;
 
-describe('ct-failure model', function() {
+describe('CTStepFailure', function() {
   var tests = [
     {
       failure: new CTStepFailure('browser_tests', 'FooTest.Bar', {}, 123, 123),
       expectedGroupName: 'FooTest',
       expectedKey: 'browser_tests::FooTest.Bar',
     },
     {
       failure: new CTStepFailure('webkit_tests', 'fast/text/foo.html', {}, 123, 123),
       expectedGroupName: 'fast/text',
       expectedKey: 'webkit_tests::fast/text/foo.html',
     },
     {
-      failure: new CTStepFailure('compile', undefined, {}, 123, 123),
+      failure: new CTStepFailure('compile', undefined, {builder1: {}}, 123, 123),
       expectedGroupName: undefined,
-      expectedKey: 'compile::undefined',
+      expectedKey: 'compile::builder1',
     }
   ];
 
   it('group name', function() {
     tests.forEach(function(test) {
       assert.equal(test.failure.reasonGroupName(), test.expectedGroupName);
     });
   });
 
   it('has key', function() {
     tests.forEach(function(test) {
       assert.propertyVal(test.failure, 'key', test.expectedKey);
     });
   });
 
   it('no tree closers', function() {
     var failure = new CTStepFailure('browser_tests', 'FooTest.Bar', {}, 123, 123);
     assert.notOk(failure.isTreeCloser());
   });
 
   it('tree closer', function() {
     var failure = new CTStepFailure('browser_tests', 'FooTest.Bar', {'builder': {isTreeCloser: true}}, 123, 123);
     assert.ok(failure.isTreeCloser());
   });
 
 });
 
 })();
 </script>