Make server use the common protocol classes

pkg/analysis_server/lib/src/services/correction/status.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 services.status;
-
-import 'package:analysis_server/protocol/protocol_generated.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart';
 
 /**
  * An outcome of a condition checking operation.
  */
 class RefactoringStatus {
   /**
    * The current severity of this [RefactoringStatus] - the maximum of the
    * severities of its [entries].
    */
   RefactoringProblemSeverity _severity = null;
@@ skipping 154 matching lines @@
   /**
    * Adds the given [RefactoringProblem] and updates [severity].
    */
   void _addProblem(RefactoringProblem problem) {
     problems.add(problem);
     // update maximum severity
     RefactoringProblemSeverity severity = problem.severity;
     _severity = RefactoringProblemSeverity.max(_severity, severity);
   }
 }