Remove dart2jslib.dart

pkg/compiler/lib/src/types/constants.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.
 
 library types.constants;
 
+import '../compiler.dart' show
+    Compiler;
 import '../constants/values.dart';
-import '../dart2jslib.dart';
 import 'types.dart';
 import '../js_backend/js_backend.dart' show SyntheticConstantKind;
 
 /// Computes the [TypeMask] for the constant [value].
 TypeMask computeTypeMask(Compiler compiler, ConstantValue value) {
   return value.accept(const ConstantValueTypeMasks(), compiler);
 }
 
 class ConstantValueTypeMasks extends ConstantValueVisitor<TypeMask, Compiler> {
   const ConstantValueTypeMasks();
@@ skipping 86 matching lines @@
   @override
   TypeMask visitString(StringConstantValue constant, Compiler compiler) {
     return compiler.typesTask.stringType;
   }
 
   @override
   TypeMask visitType(TypeConstantValue constant, Compiler compiler) {
     return compiler.typesTask.typeType;
   }
 }