add location to suggestions from local file

pkg/analysis_server/lib/src/services/completion/prefixed_element_contributor.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.completion.contributor.dart.invocation;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/services/completion/dart_completion_manager.dart';
 import 'package:analysis_server/src/services/completion/local_declaration_visitor.dart';
@@ skipping 119 matching lines @@
             constructorDecl.getAncestor((p) => p is ClassDeclaration);
         for (ClassMember member in classDecl.members) {
           if (member is FieldDeclaration) {
             for (VariableDeclaration varDecl in member.fields.variables) {
               SimpleIdentifier fieldId = varDecl.name;
               if (fieldId != null) {
                 String fieldName = fieldId.name;
                 if (fieldName != null && fieldName.length > 0) {
                   if (!referencedFields.contains(fieldName)) {
                     CompletionSuggestion suggestion =
-                        createFieldSuggestion(member, varDecl);
+                        createFieldSuggestion(request.source, member, varDecl);
                     if (suggestion != null) {
                       request.addSuggestion(suggestion);
                     }
                   }
                 }
               }
             }
           }
         }
       }
@@ skipping 278 matching lines @@
     }
     return new Future.value(false);
   }
 
   @override
   Future<bool> visitVariableElement(VariableElement element) {
     InterfaceTypeSuggestionBuilder.suggestionsFor(request, element.type);
     return new Future.value(true);
   }
 }