dart2js: run dartfmt on tests

tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart

Index: tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart
diff --git a/tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart b/tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart
index 43efdb6c8e9623438337c5c9fc536c7915b65a9b..730a5bb2fa93f651c1acee4f0d564b3df5e4ec3d 100644
--- a/tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart
+++ b/tests/compiler/dart2js_native/uninstantiated_type_parameter_test.dart
@@ -7,15 +7,12 @@ import "package:expect/expect.dart";
 
 // Test for uninstantiated native classes as type parameters.
 
-class UA {
-}
+class UA {}
 
 @Native("B")
-class UB {
-}
+class UB {}
 
-class C<T> {
-}
+class C<T> {}
 
 main() {
   var a = new C<UA>();