Support default constructors in analyzer2dart.

pkg/analyzer2dart/test/end2end_test.dart

 // Copyright (c) 2014, 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.
 
 /// End-to-end test of the analyzer2dart compiler.
 library test.end2end;
 
 import 'mock_sdk.dart';
 import 'package:analyzer/file_system/memory_file_system.dart';
 import 'package:analyzer/src/generated/element.dart';
 import 'package:analyzer/src/generated/sdk.dart';
 import 'package:analyzer/src/generated/source.dart';
 import 'package:unittest/unittest.dart';
 
 import '../lib/src/closed_world.dart';
 import '../lib/src/driver.dart';
 import '../lib/src/converted_world.dart';
 import '../lib/src/dart_backend.dart';
 
 import 'test_helper.dart' hide TestSpec;
 import 'output_helper.dart';
 import 'end2end_data.dart';
 
-main() {
-  performTests(TEST_DATA, unittester, checkResult);
+main(List<String> args) {
+  performTests(TEST_DATA, unittester, checkResult, args);
 }
 
 checkResult(TestSpec result) {
   String input = result.input;
   String expectedOutput = result.output.trim();
 
   CollectingOutputProvider outputProvider = new CollectingOutputProvider();
   MemoryResourceProvider provider = new MemoryResourceProvider();
   DartSdk sdk = new MockSdk();
   Driver driver = new Driver(provider, sdk, outputProvider);
   String rootFile = '/root.dart';
   provider.newFile(rootFile, input);
   Source rootSource = driver.setRoot(rootFile);
   FunctionElement entryPoint = driver.resolveEntryPoint(rootSource);
   ClosedWorld world = driver.computeWorld(entryPoint);
   ConvertedWorld convertedWorld = convertWorld(world);
   compileToDart(driver, convertedWorld);
   String output = outputProvider.output.text.trim();
   expect(output, equals(expectedOutput));
 }