Make server use the common protocol classes

pkg/analysis_server/test/services/refactoring/abstract_refactoring.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.
 
 import 'dart:async';
 
-import 'package:analysis_server/protocol/protocol_generated.dart'
-    show
-        RefactoringProblem,
-        RefactoringProblemSeverity,
-        SourceChange,
-        SourceEdit,
-        SourceFileEdit;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal2.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart' show Element;
 import 'package:analyzer/file_system/file_system.dart';
 import 'package:analyzer/src/dart/analysis/ast_provider_context.dart';
 import 'package:analyzer/src/dart/analysis/ast_provider_driver.dart';
 import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/generated/source.dart';
+import 'package:analyzer_plugin/protocol/protocol_common.dart'
+    show
+        RefactoringProblem,
+        RefactoringProblemSeverity,
+        SourceChange,
+        SourceEdit,
+        SourceFileEdit;
 import 'package:test/test.dart';
 
 import '../../abstract_single_unit.dart';
 
 int findIdentifierLength(String search) {
   int length = 0;
   while (length < search.length) {
     int c = search.codeUnitAt(length);
     if (!(c >= 'a'.codeUnitAt(0) && c <= 'z'.codeUnitAt(0) ||
         c >= 'A'.codeUnitAt(0) && c <= 'Z'.codeUnitAt(0) ||
@@ skipping 147 matching lines @@
       searchEngine = new SearchEngineImpl2([driver]);
       astProvider = new AstProviderForDriver(driver);
     } else {
       index = createMemoryIndex();
       searchEngine = new SearchEngineImpl(
           index, (_) => new AstProviderForContext(context));
       astProvider = new AstProviderForContext(context);
     }
   }
 }