Make more use of generated code in analysis server.

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/constants.dart';
 import 'package:analysis_server/src/protocol.dart';
 import 'package:analysis_server/src/protocol2.dart' as protocol;
 import 'package:analysis_server/src/search/element_references.dart';
 import 'package:analysis_server/src/search/type_hierarchy.dart';
-import 'package:analysis_server/src/services/json.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/src/generated/element.dart';
 
 /**
  * Instances of the class [SearchDomainHandler] implement a [RequestHandler]
  * that handles requests in the search domain.
  */
 class SearchDomainHandler implements RequestHandler {
   /**
    * The analysis server that is using this handler to process requests.
@@ skipping 141 matching lines @@
         return getTypeHierarchy(request);
       }
     } on RequestFailure catch (exception) {
       return exception.response;
     }
     return null;
   }
 
   void _sendSearchNotification(String searchId, bool isLast,
       Iterable<protocol.SearchResult> results) {
-    Notification notification = new Notification(SEARCH_RESULTS);
-    notification.setParameter(ID, searchId);
-    notification.setParameter(LAST, isLast);
-    notification.setParameter(RESULTS, objectToJson(results));
-    server.sendNotification(notification);
+    server.sendNotification(new protocol.SearchResultsParams(searchId,
+        results.toList(), isLast).toNotification());
   }
 
   static protocol.SearchResult toResult(SearchMatch match) {
     return new protocol.SearchResult.fromMatch(match);
   }
 }