dart2js: run dartfmt on tests

tests/compiler/dart2js/size_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.
 
 import 'package:expect/expect.dart';
 import "package:async_helper/async_helper.dart";
 import "compiler_helper.dart";
 
 const String TEST = "main() => [];";
 
 const Map<String, String> DEFAULT_CORELIB_WITH_LIST = const <String, String>{
   'Object': 'class Object { const Object(); }',
   'bool': 'class bool {}',
   'List': 'abstract class List<E> {}',
   'num': 'class num {}',
   'int': 'class int {}',
   'double': 'class double {}',
   'String': 'class String {}',
   'Function': 'class Function {}',
   'Null': 'class Null {}',
   'Type': 'class Type {}',
   'Map': 'class Map {}',
   'StackTrace': 'class StackTrace {}',
   'identical': 'identical(a, b) => true;',
   'proxy': 'const proxy = 0;',
 };
 
 main() {
-  asyncTest(() => compileAll(TEST, coreSource: DEFAULT_CORELIB_WITH_LIST).
-      then((generated) {
-    return MockCompiler.create((MockCompiler compiler) {
-      var backend = compiler.backend;
+  asyncTest(() =>
+      compileAll(TEST, coreSource: DEFAULT_CORELIB_WITH_LIST).then((generated) {
+        return MockCompiler.create((MockCompiler compiler) {
+          var backend = compiler.backend;
 
-      // Make sure no class is emitted.
-      Expect.isFalse(generated.contains('finishClasses'));
-    });
-  }));
+          // Make sure no class is emitted.
+          Expect.isFalse(generated.contains('finishClasses'));
+        });
+      }));
 }