dart2js: run dartfmt on tests

tests/compiler/dart2js_native/subclassing_super_field_1_test.dart

Index: tests/compiler/dart2js_native/subclassing_super_field_1_test.dart
diff --git a/tests/compiler/dart2js_native/subclassing_super_field_1_test.dart b/tests/compiler/dart2js_native/subclassing_super_field_1_test.dart
index 97da9950ba1194d67a98f789553fe8b8811a8a00..1e602df280b05d1883ef18ad5993e6f7da405c04 100644
--- a/tests/compiler/dart2js_native/subclassing_super_field_1_test.dart
+++ b/tests/compiler/dart2js_native/subclassing_super_field_1_test.dart
@@ -5,8 +5,8 @@
 import "package:expect/expect.dart";
 import 'dart:_foreign_helper' show JS;
 import 'dart:_js_helper' show Native, Creates, setNativeSubclassDispatchRecord;
-import 'dart:_interceptors' show
-    findInterceptorForType, findConstructorForNativeSubclassType;
+import 'dart:_interceptors'
+    show findInterceptorForType, findConstructorForNativeSubclassType;
 
 // Test for shadowed fields in classes that extend native classes.
 
@@ -20,7 +20,7 @@ class A extends N {
   A.init() : super.init();
 }
 
-class B extends A  {
+class B extends A {
   var foo = 222;
   B.init() : super.init();
 
@@ -28,10 +28,10 @@ class B extends A  {
   Bfoo() => foo;
 }
 
-B makeB() native;
+B makeB() native ;
 
 @Creates('=Object')
-getBPrototype() native;
+getBPrototype() native ;
 
 void setup() native r"""
 function B() { }