Remove dart2jslib.dart

tests/compiler/dart2js/in_user_code_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.
 
 // Test that the helper [Compiler.inUserCode] works as intended.
 
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
-import 'package:compiler/src/dart2jslib.dart' show Compiler;
+import 'package:compiler/src/compiler.dart' show Compiler;
 import 'memory_compiler.dart';
 
 const SOURCE = const {
   'main.dart': """
 library main;
 
 import 'dart:async';
 import 'foo.dart';
 import 'pkg/sub/bar.dart';
 import 'package:sub/bar.dart';
@@ skipping 72 matching lines @@
        'dart:core': false});
   await test(
       [Uri.parse('dart:async'), Uri.parse('package:sub/bar.dart')],
       {'package:sub/bar.dart': true,
        'package:sub/baz.dart': true,
        'package:sup/boz.dart': false,
        'dart:core': true,
        'dart:async': true});
 }