Format all files under tools and utils directory.

utils/tests/testrunner/browser_tests/web/browser_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.
 
 library testrunner_test;
 
 import 'package:unittest/unittest.dart';
 
 foo(bool x) => x;
 
 main() {
   group('group1', () {
     test('test1', () {
       expect(true, isFalse);
     });
   });
   group('group2', () {
     test('test2', () {
       foo(3);
       expect(true, isTrue);
     });
   });
 }
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