Make more use of generated code in analysis server.

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.
 
 library test.services.refactoring;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol2.dart';
-import 'package:analysis_server/src/services/correction/change.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/index/index.dart';
 import 'package:analysis_server/src/services/index/local_memory_index.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analysis_testing/abstract_single_unit.dart';
 import 'package:analyzer/src/generated/ast.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
 
@@ skipping 13 matching lines @@
 }
 
 
 /**
  * The base class for all [Refactoring] tests.
  */
 abstract class RefactoringTest extends AbstractSingleUnitTest {
   Index index;
   SearchEngineImpl searchEngine;
 
-  Change refactoringChange;
+  SourceChange refactoringChange;
 
   Refactoring get refactoring;
 
   /**
    * Asserts that [refactoring] initial/final conditions status is OK.
    */
   Future assertRefactoringConditionsOK() {
     return refactoring.checkInitialConditions().then((status) {
       assertRefactoringStatusOK(status);
       return refactoring.checkFinalConditions().then((status) {
@@ skipping 58 matching lines @@
     CompilationUnit unit = resolveLibraryUnit(source);
     index.indexUnit(context, unit);
   }
 
   void setUp() {
     super.setUp();
     index = createLocalMemoryIndex();
     searchEngine = new SearchEngineImpl(index);
   }
 }