Issue 19697. Partial fix - don't search for subclasss members.

pkg/analysis_server/lib/src/search/element_references.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 search.element_references;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/collections.dart';
 import 'package:analysis_server/src/protocol.dart' show SearchResult;
@@ skipping 65 matching lines @@
   /**
    * Returns a [Future] completing with [Element]s to search references to.
    *
    * If a [ClassMemberElement] is given, each corresponding [Element] in the
    * hierarchy is returned.
    *
    * Otherwise, only references to [element] should be searched.
    */
   Future<Iterable<Element>> _getRefElements(Element element) {
     if (element is ClassMemberElement) {
-      return getHierarchyMembers(searchEngine, element);
+      return getHierarchyMembers(searchEngine, element, true);
     }
     return new Future.value([element]);
   }
 
   SearchResult _newDeclarationResult(Element refElement) {
     int nameOffset = refElement.nameOffset;
     int nameLength = refElement.name.length;
     SearchMatch searchMatch =
         new SearchMatch(
             MatchKind.DECLARATION,
@@ skipping 48 matching lines @@
    * Adds a [Future] or an [E] value to results.
    */
   void add(value) {
     if (value is Future) {
       _futures.add(value);
     } else {
       _futures.add(new Future.value(<E>[value]));
     }
   }
 }