Stop using Element.computeNode() in refactorings and fixes.

pkg/analysis_server/lib/src/services/refactoring/rename_constructor.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.src.refactoring.rename_constructor;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/protocol_server.dart' hide Element;
 import 'package:analysis_server/src/services/correction/source_range.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/correction/util.dart';
 import 'package:analysis_server/src/services/refactoring/naming_conventions.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring_internal.dart';
 import 'package:analysis_server/src/services/refactoring/rename.dart';
 import 'package:analysis_server/src/services/search/hierarchy.dart';
 import 'package:analysis_server/src/services/search/search_engine.dart';
 import 'package:analysis_server/src/services/search/search_engine_internal.dart';
 import 'package:analyzer/dart/ast/ast.dart';
 import 'package:analyzer/dart/element/element.dart';
+import 'package:analyzer/src/dart/element/ast_provider.dart';
 import 'package:analyzer/src/generated/java_core.dart';
 import 'package:analyzer/src/generated/source.dart';
 
 /**
  * A [Refactoring] for renaming [ConstructorElement]s.
  */
 class RenameConstructorRefactoringImpl extends RenameRefactoringImpl {
+  final AstProvider astProvider;
+
   RenameConstructorRefactoringImpl(
-      SearchEngine searchEngine, ConstructorElement element)
+      SearchEngine searchEngine, this.astProvider, ConstructorElement element)
       : super(searchEngine, element);
 
   @override
   ConstructorElement get element => super.element as ConstructorElement;
 
   @override
   String get refactoringName {
     return "Rename Constructor";
   }
 
@@ skipping 13 matching lines @@
     return result;
   }
 
   @override
   Future fillChange() async {
     // prepare references
     List<SearchMatch> matches = await searchEngine.searchReferences(element);
     List<SourceReference> references = getSourceReferences(matches);
     // append declaration
     if (element.isSynthetic) {
-      _replaceSynthetic();
+      await _replaceSynthetic();
     } else {
       references.add(_createDeclarationReference());
     }
     // update references
     String replacement = newName.isEmpty ? '' : '.$newName';
     for (SourceReference reference in references) {
       reference.addEdit(change, replacement);
     }
   }
 
@@ skipping 25 matching lines @@
     return new SourceReference(new SearchMatchImpl(
         element.context,
         element.library.source.uri.toString(),
         element.source.uri.toString(),
         MatchKind.DECLARATION,
         sourceRange,
         true,
         true));
   }
 
-  void _replaceSynthetic() {
+  Future<Null> _replaceSynthetic() async {
     ClassElement classElement = element.enclosingElement;
-    ClassDeclaration classNode = classElement.computeNode();
+    ClassDeclaration classNode =
+        await astProvider.getResolvedNodeForElement(classElement);
     CorrectionUtils utils = new CorrectionUtils(classNode.parent);
     ClassMemberLocation location =
         utils.prepareNewConstructorLocation(classNode);
     doSourceChange_addElementEdit(
         change,
         classElement,
         new SourceEdit(
             location.offset,
             0,
             location.prefix +
                 '${classElement.name}.$newName();' +
                 location.suffix));
   }
 }