Fix for searching constructor references.

pkg/analysis_server/lib/src/services/search/search_engine_internal.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 services.src.search.search_engine;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
@@ skipping 111 matching lines @@
         IndexConstants.IS_REFERENCED_BY,
         MatchKind.REFERENCE);
     return requestor.merge();
   }
 
   Future<List<SearchMatch>>
       _searchReferences_Constructor(ConstructorElement constructor) {
     _Requestor requestor = new _Requestor(_index);
     requestor.add(
         constructor,
-        IndexConstants.NAME_IS_DEFINED_BY,
-        MatchKind.DECLARATION);
-    requestor.add(
-        constructor,
         IndexConstants.IS_REFERENCED_BY,
         MatchKind.REFERENCE);
     return requestor.merge();
   }
 
   Future<List<SearchMatch>>
       _searchReferences_Field(PropertyInducingElement field) {
     PropertyAccessorElement getter = field.getter;
     PropertyAccessorElement setter = field.setter;
     _Requestor requestor = new _Requestor(_index);
@@ skipping 91 matching lines @@
     });
     futures.add(matchesFuture);
   }
 
   Future<List<SearchMatch>> merge() {
     return Future.wait(futures).then((List<List<SearchMatch>> matchesList) {
       return matchesList.expand((matches) => matches).toList();
     });
   }
 }