Make more use of generated code in analysis server.

pkg/analysis_server/lib/src/services/refactoring/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.
 
 library services.refactoring;
 
 import 'dart:async';
 
-import 'package:analysis_server/src/services/correction/change.dart';
+import 'package:analysis_server/src/protocol2.dart' show SourceChange;
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/extract_local.dart';
 import 'package:analysis_server/src/services/refactoring/rename_class_member.dart';
 import 'package:analysis_server/src/services/refactoring/rename_constructor.dart';
 import 'package:analysis_server/src/services/refactoring/rename_import.dart';
 import 'package:analysis_server/src/services/refactoring/rename_library.dart';
 import 'package:analysis_server/src/services/refactoring/rename_local.dart';
 import 'package:analysis_server/src/services/refactoring/rename_unit_member.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analyzer/src/generated/ast.dart';
@@ skipping 98 matching lines @@
   /**
    * Validates arguments to check if this refactoring can be performed.
    *
    * This check should be quick because it is used often as arguments change.
    */
   Future<RefactoringStatus> checkInitialConditions();
 
   /**
    * Returns the [Change] to apply to perform this refactoring.
    */
-  Future<Change> createChange();
+  Future<SourceChange> createChange();
 
   /**
    * Returs `true` if the [Change] created by refactoring may be unsafe,
    * so we want user to review the [Change] to ensure that he understands it.
    */
   bool requiresPreview();
 }
 
 
 /**
@@ skipping 44 matching lines @@
    * Validates that the [newName] is a valid identifier and is appropriate for
    * the type of the [Element] being renamed.
    *
    * It does not perform all the checks (such as checking for conflicts with any
    * existing names in any of the scopes containing the current name), as many
    * of these checkes require search engine. Use [checkFinalConditions] for this
    * level of checking.
    */
   RefactoringStatus checkNewName();
 }