Do proper JSON conversion when returning search results.

pkg/analysis_server/lib/src/search/search_domain.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.domain;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/analysis_server.dart';
 import 'package:analysis_server/src/computer/element.dart' as se;
@@ skipping 62 matching lines @@
     if (elements.isEmpty) {
       new Future.microtask(() {
         _sendSearchNotification(searchId, true, []);
       });
     }
     // respond
     Response response = new Response(request.id);
     response.setResult(ID, searchId);
     if (elements.isNotEmpty) {
       var serverElement = new se.Element.fromEngine(elements[0]);
-      response.setResult(ELEMENT, serverElement);
+      response.setResult(ELEMENT, objectToJson(serverElement));
     }
     return response;
   }
 
   Response findMemberDeclarations(Request request) {
     String name = request.getRequiredParameter(NAME).asString();
     // schedule search
     String searchId = (_nextSearchId++).toString();
     {
       var matchesFuture = searchEngine.searchMemberDeclarations(name);
@@ skipping 81 matching lines @@
       return exception.response;
     }
     return null;
   }
 
   void _sendSearchNotification(String searchId, bool isLast,
       Iterable<SearchResult> results) {
     Notification notification = new Notification(SEARCH_RESULTS);
     notification.setParameter(ID, searchId);
     notification.setParameter(LAST, isLast);
-    notification.setParameter(RESULTS, results);
+    notification.setParameter(RESULTS, objectToJson(results));
     server.sendNotification(notification);
   }
 
   static SearchResult toResult(SearchMatch match) {
     return new SearchResult.fromMatch(match);
   }
 }