Unify the server and plugin versions of the generators

pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart

Index: pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart
diff --git a/pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart b/pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart
index a4d7b73ec50619a71de1c2dee6f49f458b469e12..ea65d56ada69aa5a9d93641ef35805092f9c45b2 100644
--- a/pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart
+++ b/pkg/analysis_server/test/services/completion/dart/label_contributor_test.dart
@@ -2,12 +2,7 @@
 // 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.completion.contributor.dart.label;
-
-import 'package:analysis_server/plugin/protocol/protocol.dart' as protocol
-    show Element, ElementKind;
-import 'package:analysis_server/plugin/protocol/protocol.dart'
-    hide Element, ElementKind;
+import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/protocol_server.dart';
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
 import 'package:analysis_server/src/services/completion/dart/label_contributor.dart';
@@ -31,10 +26,10 @@ class LabelContributorTest extends DartCompletionContributorTest {
     CompletionSuggestion cs =
         assertSuggest(name, csKind: kind, relevance: relevance);
     expect(cs.returnType, isNull);
-    protocol.Element element = cs.element;
+    Element element = cs.element;
     expect(element, isNotNull);
     expect(element.flags, 0);
-    expect(element.kind, equals(protocol.ElementKind.LABEL));
+    expect(element.kind, equals(ElementKind.LABEL));
     expect(element.name, equals(name));
     expect(element.parameters, isNull);
     expect(element.returnType, isNull);