Remove dart2jslib.dart

tests/compiler/dart2js/constant_expression_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 constant_expression_test;
 
 import 'dart:async';
 import 'package:async_helper/async_helper.dart';
 import 'package:expect/expect.dart';
 import 'package:compiler/src/constants/expressions.dart';
-import 'package:compiler/src/dart2jslib.dart';
+import 'package:compiler/src/compiler.dart';
 import 'package:compiler/src/elements/elements.dart';
 import 'memory_compiler.dart';
 
 class TestData {
   /// Declarations needed for the [constants].
   final String declarations;
   /// Tested constants.
   final List constants;
 
   const TestData(this.declarations, this.constants);
@@ skipping 215 matching lines @@
         String name = '$field';
         String expression = instanceFields[field].getText();
         String expected = data.fields[name];
         Expect.equals(expected, expression,
             "Unexpected field expression ${expression} for field '$name' in "
             "contant `${constant.getText()}`, expected '${expected}'.");
       });
     }
   });
 }