Make server use the common protocol classes

pkg/analysis_server/test/integration/support/integration_test_methods.dart

 // Copyright (c) 2017, 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.
 //
 // This file has been automatically generated.  Please do not edit it manually.
 // To regenerate the file, use the script
 // "pkg/analysis_server/tool/spec/generate_files".
 
 /**
  * Convenience methods for running integration tests
  */
 import 'dart:async';
 
 import 'package:analysis_server/protocol/protocol_generated.dart';
 import 'package:analysis_server/src/protocol/protocol_internal.dart';
 import 'package:test/test.dart';
 
 import 'integration_tests.dart';
 import 'protocol_matchers.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart';
 
 /**
  * Convenience methods for running integration tests
  */
 abstract class IntegrationTestMixin {
   Server get server;
 
   /**
    * Return the version number of the analysis server.
    *
@@ skipping 1851 matching lines @@
         outOfTestExpect(params, isExecutionLaunchDataParams);
         _onExecutionLaunchData.add(
             new ExecutionLaunchDataParams.fromJson(decoder, 'params', params));
         break;
       default:
         fail('Unexpected notification: $event');
         break;
     }
   }
 }