Fix for constructor search.

pkg/analyzer/lib/src/dart/analysis/search.dart

 // Copyright (c) 2016, 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.
 
 import 'dart:async';
 
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/ast/visitor.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:analyzer/dart/element/visitor.dart';
@@ skipping 66 matching lines @@
       Map<IndexRelationKind, SearchResultKind> relationToResultKind) async {
     String path = element.source.fullName;
 
     // If the file with the element is not known, then the element is not used.
     if (!_driver.knownFiles.contains(path)) {
       return;
     }
 
     // TODO(scheglov) optimize for private elements
     String name = element.displayName;
+    if (element is ConstructorElement) {
+      name = element.enclosingElement.displayName;
+    }
 
     // Prepare the list of files that reference the element name.
     List<String> files = await _driver.getFilesReferencingName(name);
     if (!files.contains(path) && _driver.addedFiles.contains(path)) {
       files.add(path);
     }
 
     // Check the index of every file that references the element name.
     for (String file in files) {
       IndexResult result = await _driver.getIndex(file);
@@ skipping 531 matching lines @@
   }
 
   void _addResult(AstNode node, SearchResultKind kind) {
     bool isQualified = node.parent is Label;
     Element enclosingElement =
         _getEnclosingElement(enclosingUnitElement, node.offset);
     results.add(new SearchResult._(element, enclosingElement, kind, node.offset,
         node.length, true, isQualified));
   }
 }