Make "server.shutdown" exit the analysis server.

pkg/analysis_server/lib/src/analysis_server.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 analysis.server;
 
 import 'dart:async';
 import 'dart:collection';
 
 import 'package:analyzer/file_system/file_system.dart';
@@ skipping 683 matching lines @@
       completer.completeError(message);
     }
   }
 
   void shutdown() {
     running = false;
     if (index != null) {
       index.clear();
       index.stop();
     }
+    // Defer closing the channel so that the shutdown response can be sent.
+    new Future(channel.close);
   }
 
   /**
    * Return the [CompilationUnit] of the Dart file with the given [path].
    * Return `null` if the file is not a part of any context.
    */
   CompilationUnit test_getResolvedCompilationUnit(String path) {
     // prepare AnalysisContext
     AnalysisContext context = getAnalysisContext(path);
     if (context == null) {
@@ skipping 74 matching lines @@
 /**
  * An enumeration of the services provided by the server domain.
  */
 class ServerService extends Enum2<ServerService> {
   static const ServerService STATUS = const ServerService('STATUS', 0);
 
   static const List<ServerService> VALUES = const [STATUS];
 
   const ServerService(String name, int ordinal) : super(name, ordinal);
 }