Unify the server and plugin versions of the generators

pkg/analysis_server/test/services/refactoring/convert_getter_to_method_test.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 test.services.refactoring.convert_getter_to_method;
-
 import 'dart:async';
 
-import 'package:analysis_server/plugin/protocol/protocol.dart' hide ElementKind;
+import 'package:analysis_server/protocol/protocol_generated.dart'
+    hide ElementKind;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analyzer/dart/element/element.dart';
 import 'package:test_reflective_loader/test_reflective_loader.dart';
 
 import 'abstract_refactoring.dart';
 
 main() {
   defineReflectiveSuite(() {
     defineReflectiveTests(ConvertGetterToMethodTest);
@@ skipping 145 matching lines @@
     ExecutableElement element = findNodeElementAtString(search);
     _createRefactoringForElement(element);
   }
 }
 
 @reflectiveTest
 class ConvertGetterToMethodTest_Driver extends ConvertGetterToMethodTest {
   @override
   bool get enableNewAnalysisDriver => true;
 }