Unify the server and plugin versions of the generators

pkg/analysis_server/lib/src/analysis_manager.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.
 
 import 'dart:async';
 import 'dart:convert';
 import 'dart:io';
 
-import 'package:analysis_server/plugin/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol.dart';
+import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/channel/channel.dart';
 import 'package:analysis_server/src/channel/web_socket_channel.dart';
 
 /**
  * [AnalysisManager] is used to launch and manage an analysis server
  * running in a separate process using either the [start] or [connect] methods.
  */
 class AnalysisManager {
   // TODO dynamically allocate port and/or allow client to specify port
   static const int PORT = 3333;
@@ skipping 109 matching lines @@
   }
 
   /**
    * Launch analysis server in a separate process
    * and return a future with a manager for that analysis server.
    */
   static Future<AnalysisManager> start(String serverPath) {
     return new AnalysisManager()._launchServer(serverPath);
   }
 }