Fix for searching constructor references.

pkg/analysis_server/test/services/search/search_engine_test.dart

 // Copyright (c) 2014, the Dart project authors.  Please see the AUTHORS file
 // for details. All rights reserved. Use of this source code is governed by a
 // BSD-style license that can be found in the LICENSE file.
 
 library test.services.src.search.search_engine;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
@@ skipping 193 matching lines @@
   Future test_searchReferences_ConstructorElement() {
     _indexTestUnit('''
 class A {
   A.named() {}
 }
 main() {
   new A.named();
 }
 ''');
     ConstructorElement element = findElement('named');
-    ClassElement elementA = findElement('A');
     Element mainElement = findElement('main');
     var expected = [
-        _expectId(elementA, MatchKind.DECLARATION, '.named() {}', length: 6),
         _expectId(mainElement, MatchKind.REFERENCE, '.named();', length: 6)];
     return _verifyReferences(element, expected);
   }
 
   Future test_searchReferences_Element_unknown() {
     return _verifyReferences(UniverseElement.INSTANCE, []);
   }
 
   Future test_searchReferences_FieldElement() {
     _indexTestUnit('''
@@ skipping 412 matching lines @@
         pattern).then((List<SearchMatch> matches) {
       _assertMatches(matches, expectedMatches);
     });
   }
 
   static void _assertMatches(List<SearchMatch> matches,
       List<ExpectedMatch> expectedMatches) {
     expect(matches, unorderedEquals(expectedMatches));
   }
 }