Issue 20240. Use a FileManager that manages its own temporary directory.

pkg/analysis_server/lib/src/domain_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 domain.server;
 
 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_services/constants.dart';
@@ skipping 100 matching lines @@
 //    }
 //    server.contextIdMap.remove(removedContext);
 //    Response response = new Response(request.id);
 //    return response;
 //  }
 
   /**
    * Cleanly shutdown the analysis server.
    */
   Response shutdown(Request request) {
-    server.running = false;
+    server.shutdown();
     Response response = new Response(request.id);
     return response;
   }
 }