Make server use the common protocol classes

pkg/analysis_server/lib/src/services/completion/dart/label_contributor.dart

 // Copyright (c) 2015, 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 services.completion.contributor.dart.label;
-
 import 'dart:async';
 
-import 'package:analysis_server/protocol/protocol_generated.dart' as protocol
-    show ElementKind;
 import 'package:analysis_server/src/protocol_server.dart'
     show CompletionSuggestion, CompletionSuggestionKind;
 import 'package:analysis_server/src/provisional/completion/dart/completion_dart.dart';
 import 'package:analysis_server/src/services/completion/dart/completion_manager.dart'
     show DartCompletionRequestImpl;
 import 'package:analysis_server/src/services/completion/dart/local_declaration_visitor.dart'
     show LocalDeclarationVisitor;
 import 'package:analysis_server/src/services/completion/dart/optype.dart';
 import 'package:analysis_server/src/services/completion/dart/utilities.dart';
 import 'package:analyzer/dart/ast/ast.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart' as protocol
+    show ElementKind;
 
 /**
  * A contributor for calculating label suggestions.
  */
 class LabelContributor extends DartCompletionContributor {
   @override
   Future<List<CompletionSuggestion>> computeSuggestions(
       DartCompletionRequest request) async {
     OpType optype = (request as DartCompletionRequestImpl).opType;
 
@@ skipping 118 matching lines @@
             0,
             false,
             false);
         suggestions.add(suggestion);
         return suggestion;
       }
     }
     return null;
   }
 }