Remove Compiler access from ResolutionEnqueuer

pkg/compiler/lib/src/types/masks.dart

 // Copyright (c) 2016, 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 masks;
 
 import '../common.dart';
 import '../common/backend_api.dart' show BackendClasses;
 import '../compiler.dart' show Compiler;
 import '../constants/values.dart' show PrimitiveConstantValue;
@@ skipping 15 matching lines @@
 part 'flat_type_mask.dart';
 part 'forwarding_type_mask.dart';
 part 'map_type_mask.dart';
 part 'type_mask.dart';
 part 'union_type_mask.dart';
 part 'value_type_mask.dart';
 
 class CommonMasks {
   // TODO(sigmund): once we split out the backend common elements, depend
   // directly on those instead.
-  final Compiler compiler;
+  final ClosedWorld closedWorld;
 
-  CommonMasks(this.compiler);
-
-  ClosedWorld get closedWorld => compiler.closedWorld;
+  CommonMasks(this.closedWorld);
 
   BackendClasses get backendClasses => closedWorld.backendClasses;
 
   TypeMask _dynamicType;
   TypeMask _nonNullType;
   TypeMask _nullType;
   TypeMask _intType;
   TypeMask _uint32Type;
   TypeMask _uint31Type;
   TypeMask _positiveIntType;
@@ skipping 77 matching lines @@
       _asyncFutureType ??= new TypeMask.nonNullExact(
           backendClasses.asyncFutureImplementation, closedWorld);
 
   TypeMask get asyncStarStreamType =>
       _asyncStarStreamType ??= new TypeMask.nonNullExact(
           backendClasses.asyncStarStreamImplementation, closedWorld);
 
   // TODO(johnniwinther): Assert that the null type has been resolved.
   TypeMask get nullType => _nullType ??= const TypeMask.empty();
 }