Make source be a target

pkg/analyzer/test/src/task/targets_test.dart

-// Copyright (c) 2015, 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 test.src.task.targets_test;
-
-import 'package:analyzer/src/generated/source.dart';
-import 'package:analyzer/src/task/targets.dart';
-import 'package:unittest/unittest.dart';
-
-import '../../generated/test_support.dart';
-import '../../reflective_tests.dart';
-
-main() {
-  groupSep = ' | ';
-  runReflectiveTests(SourceTargetTest);
-}
-
-@reflectiveTest
-class SourceTargetTest extends EngineTestCase {
-  test_create() {
-    Source source = new TestSource();
-    SourceTarget target = new SourceTarget(source);
-    expect(target, isNotNull);
-    expect(target.source, source);
-  }
-}