Add compile_from_dill_fast_startup_test

tests/compiler/dart2js/kernel/compile_from_dill_fast_startup_test.dart

+// Copyright (c) 2017, 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 compilation equivalence between source and .dill based
+// compilation using the fast_startup emitter.
+library dart2js.kernel.compile_from_dill_fast_startup_test;
+
+import 'dart:async';
+import 'package:async_helper/async_helper.dart';
+import 'package:compiler/src/commandline_options.dart';
+import '../serialization/helper.dart';
+
+import 'compile_from_dill_test_helper.dart';
+
+// TODO(johnniwinther): Maybe share this with 'compile_from_dill_test.dart'.
+const SOURCE = const {
+  'main.dart': '''
+foo({named}) => 1;
+bar(a) => !a;
+class Class {
+  var field;
+  static var staticField;
+  Class(this.field);
+}
+main() {
+  foo();
+  bar(true);
+  [];
+  {};
+  new Object();
+  new Class('');
+  Class.staticField;
+  var x = null;
+  for (int i = 0; i < 10; i++) {
+    x = i;
+    if (i == 5) break;
+  }
+  return x;
+}
+'''
+};
+
+main(List<String> args) {
+  asyncTest(() async {
+    await mainInternal(args);
+  });
+}
+
+Future<ResultKind> mainInternal(List<String> args,
+    {bool skipWarnings: false, bool skipErrors: false}) async {
+  Arguments arguments = new Arguments.from(args);
+  Uri entryPoint;
+  Map<String, String> memorySourceFiles;
+  if (arguments.uri != null) {
+    entryPoint = arguments.uri;
+    memorySourceFiles = const <String, String>{};
+  } else {
+    entryPoint = Uri.parse('memory:main.dart');
+    memorySourceFiles = SOURCE;
+  }
+
+  return runTest(entryPoint, memorySourceFiles,
+      verbose: arguments.verbose,
+      skipWarnings: skipWarnings,
+      skipErrors: skipErrors,
+      options: [Flags.fastStartup]);
+}