Resynthesize typedefs from Kernel.

pkg/analyzer/test/src/summary/resynthesize_common.dart

Index: pkg/analyzer/test/src/summary/resynthesize_common.dart
diff --git a/pkg/analyzer/test/src/summary/resynthesize_common.dart b/pkg/analyzer/test/src/summary/resynthesize_common.dart
index e91f4c1128c61c33e7bf400a1a6231efea580321..bd1c556a1ce8af1fd7f514c343471792ad62298c 100644
--- a/pkg/analyzer/test/src/summary/resynthesize_common.dart
+++ b/pkg/analyzer/test/src/summary/resynthesize_common.dart
@@ -9440,6 +9440,13 @@ typedef dynamic F(dynamic x, dynamic y);
 ''');
   }
 
+  test_typedef_parameters_named() async {
+    var library = await checkLibrary('typedef F({y, z, x});');
+    checkElementText(library, r'''
+typedef dynamic F({dynamic y}, {dynamic z}, {dynamic x});
+''');
+  }
+
   test_typedef_return_type() async {
     var library = await checkLibrary('typedef int F();');
     checkElementText(library, r'''