Use new library/import syntax in dart2js.

sdk/lib/_internal/compiler/implementation/dart2js.dart

Index: sdk/lib/_internal/compiler/implementation/dart2js.dart
diff --git a/sdk/lib/_internal/compiler/implementation/dart2js.dart b/sdk/lib/_internal/compiler/implementation/dart2js.dart
index e8c25919ed1c6d12a08c37bb23cd5da148c97573..f6a91d73f10f84ed15452887f99e328b6f9217f4 100644
--- a/sdk/lib/_internal/compiler/implementation/dart2js.dart
+++ b/sdk/lib/_internal/compiler/implementation/dart2js.dart
@@ -2,17 +2,17 @@
 // 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('dart2js');
+library dart2js;
 
-#import('dart:io');
-#import('dart:uri');
-#import('dart:utf');
+import 'dart:io';
+import 'dart:uri';
+import 'dart:utf';
 
-#import('../compiler.dart', prefix: 'api');
-#import('colors.dart', prefix: 'colors');
-#import('source_file.dart');
-#import('filenames.dart');
-#import('util/uri_extras.dart');
+import '../compiler.dart' as api;
+import 'colors.dart' as colors;
+import 'source_file.dart';
+import 'filenames.dart';
+import 'util/uri_extras.dart';
 
 const String LIBRARY_ROOT = '../../../../..';
 const String OUTPUT_LANGUAGE_DART = 'Dart';