Unify the server and plugin versions of the generators

pkg/analysis_server/lib/src/computer/new_notifications.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 'package:analysis_server/plugin/protocol/protocol.dart' as protocol;
+import 'package:analysis_server/protocol/protocol_generated.dart' as protocol;
 import 'package:analysis_server/src/analysis_server.dart' show AnalysisServer;
 import 'package:analysis_server/src/domains/analysis/navigation.dart';
 import 'package:analysis_server/src/domains/analysis/navigation_dart.dart';
 import 'package:analysis_server/src/domains/analysis/occurrences.dart';
 import 'package:analysis_server/src/domains/analysis/occurrences_dart.dart';
 import 'package:analysis_server/src/protocol_server.dart' as protocol;
 import 'package:analyzer/src/dart/analysis/driver.dart';
 
 void new_sendDartNotificationNavigation(
     AnalysisServer analysisServer, AnalysisResult result) {
@@ skipping 20 matching lines @@
   }
 }
 
 void new_sendErrorNotification(
     AnalysisServer analysisServer, AnalysisResult result) {
   var serverErrors = protocol.doAnalysisError_listFromEngine(
       result.driver.analysisOptions, result.lineInfo, result.errors);
   var params = new protocol.AnalysisErrorsParams(result.path, serverErrors);
   analysisServer.sendNotification(params.toNotification());
 }