dart2js: run dartfmt on tests

tests/compiler/dart2js/mirror_private_name_inheritance_test.dart

 // Copyright (c) 2013, 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.
 
 // Test that final fields in @MirrorsUsed are still inferred.
 
 import 'package:expect/expect.dart';
 import "package:async_helper/async_helper.dart";
 import 'memory_compiler.dart' show runCompiler;
 import 'compiler_helper.dart' show findElement;
 
-const MEMORY_SOURCE_FILES = const <String, String> {
+const MEMORY_SOURCE_FILES = const <String, String>{
   'main.dart': """
 @MirrorsUsed(targets: 'Super')
 import 'dart:mirrors';
 import 'lib.dart';
 
 
 class Subclass extends Super {
   int _private;
 
   int magic() => _private++;
@@ skipping 10 matching lines @@
   int magic() => _private++;
 }
 """
 };
 
 void main() {
   asyncTest(() async {
     var result = await runCompiler(memorySourceFiles: MEMORY_SOURCE_FILES);
     var compiler = result.compiler;
 
-    var superclass = findElement(compiler, 'Super', Uri.parse('memory:lib.dart'));
+    var superclass =
+        findElement(compiler, 'Super', Uri.parse('memory:lib.dart'));
     var subclass = findElement(compiler, 'Subclass');
     var oracle = compiler.backend.isAccessibleByReflection;
     print(superclass.lookupMember('_private'));
     Expect.isTrue(oracle(superclass.lookupMember('_private')));
     Expect.isFalse(oracle(subclass.lookupMember('_private')));
   });
 }