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

pkg/analysis_server/test/services/refactoring/rename_constructor_test.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.rename_constructor;
 
 import 'package:analysis_server/plugin/protocol/protocol.dart';
 import 'package:analysis_server/src/services/correction/status.dart';
 import 'package:analysis_server/src/services/refactoring/refactoring.dart';
 import 'package:analyzer/dart/ast/ast.dart';
@@ skipping 217 matching lines @@
   B() : super() {}
   factory B._() = A;
 }
 main() {
   new A();
 }
 ''');
   }
 
   test_newInstance_nullElement() async {
-    RenameRefactoring refactoring = new RenameRefactoring(searchEngine, null);
+    RenameRefactoring refactoring =
+        new RenameRefactoring(searchEngine, null, null);
     expect(refactoring, isNull);
   }
 
   void _createConstructorDeclarationRefactoring(String search) {
     ConstructorElement element = findNodeElementAtString(
         search, (node) => node is ConstructorDeclaration);
     createRenameRefactoringForElement(element);
   }
 
   void _createConstructorInvocationRefactoring(String search) {
     ConstructorElement element = findNodeElementAtString(
         search, (node) => node is InstanceCreationExpression);
     createRenameRefactoringForElement(element);
   }
 }
 
 @reflectiveTest
 class RenameConstructorTest_Driver extends RenameConstructorTest {
   @override
   bool get enableNewAnalysisDriver => true;
 }