Ensure shutdown is always called

pkg/analysis_server/lib/driver.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 driver;
 
 import 'dart:async';
 import 'dart:io';
 
 import 'package:analysis_server/http_server.dart';
@@ skipping 216 matching lines @@
 
     if (serve_http) {
       httpServer.serveHttp(port);
     }
 
     if (results[INTERNAL_PRINT_TO_CONSOLE]) {
       stdioServer.serveStdio().then((_) {
         if (serve_http) {
           httpServer.close();
         }
+        service.shutdown();
         exit(0);
       });
     } else {
       _capturePrints(() {
         stdioServer.serveStdio().then((_) {
           if (serve_http) {
             httpServer.close();
           }
+          service.shutdown();
           exit(0);
         });
       }, httpServer.recordPrint);
     }
   }
 
   /**
    * Execute [callback], capturing any data it prints out and redirecting it to
    * the function [printHandler].
    */
@@ skipping 10 matching lines @@
   /**
    * Print information about how to use the server.
    */
   void _printUsage(ArgParser parser) {
     print('Usage: $BINARY_NAME [flags]');
     print('');
     print('Supported flags are:');
     print(parser.usage);
   }
 }