Use typed RefactoringOptions in the Dart version of the protocol.

pkg/analysis_server/test/edit/refactoring_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.edit.refactoring;
 
 import 'dart:async';
 
 import 'package:analysis_server/src/edit/edit_domain.dart';
 import 'package:analysis_server/src/protocol.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/json.dart';
 import 'package:unittest/unittest.dart' hide ERROR;
 
 import '../analysis_abstract.dart';
 import '../reflective_tests.dart';
 
 
 main() {
   groupSep = ' | ';
   runReflectiveTests(ExtractLocalVariableTest);
   runReflectiveTests(ExtractMethodTest);
@@ skipping 635 matching lines @@
 ''');
   }
 
   Future<Response> _sendInlineRequest(String search) {
     Request request = new EditGetRefactoringParams(
         RefactoringKind.INLINE_METHOD,
         testFile,
         findOffset(search),
         0,
         false,
-        options: options.toJson()).toRequest('0');
+        options: options).toRequest('0');
     return serverChannel.sendRequest(request);
   }
 }
 
 
 @ReflectiveTestCase()
 class RenameTest extends _AbstractGetRefactoring_Test {
   Future<Response> sendRenameRequest(String search, String newName,
       [bool validateOnly = false]) {
+    RenameOptions options = newName != null ? new RenameOptions(newName) : null;
     Request request = new EditGetRefactoringParams(
         RefactoringKind.RENAME,
         testFile,
         findOffset(search),
         0,
         validateOnly,
-        options: new RenameOptions(newName).toJson()).toRequest('0');
+        options: options).toRequest('0');
     return serverChannel.sendRequest(request);
   }
 
   test_class() {
     addTestFile('''
 class Test {}
 main() {
   Test v;
 }
 ''');
@@ skipping 341 matching lines @@
   Future<EditGetRefactoringResult> getRefactoringResult(Future<Response>
       requestSender()) {
     return waitForTasksFinished().then((_) {
       return requestSender().then((Response response) {
         return new EditGetRefactoringResult.fromResponse(response);
       });
     });
   }
 
   Future<Response> sendRequest(RefactoringKind kind, int offset, int length,
-      HasToJson options, [bool validateOnly = false]) {
-    Map optionsJson = options != null ? options.toJson() : null;
+      RefactoringOptions options, [bool validateOnly = false]) {
     Request request = new EditGetRefactoringParams(
         kind,
         testFile,
         offset,
         length,
         validateOnly,
-        options: optionsJson).toRequest('0');
+        options: options).toRequest('0');
     return serverChannel.sendRequest(request);
   }
 
   @override
   void setUp() {
     super.setUp();
     server.handlers = [new EditDomainHandler(server),];
     createProject();
     handler = new EditDomainHandler(server);
   }
 }