Remove Enqueuer.nativeEnqueuer

pkg/compiler/lib/src/native/enqueue.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.
 
 import '../common.dart';
 import '../common/backend_api.dart' show ForeignResolver;
 import '../common/resolution.dart' show Resolution;
 import '../compiler.dart' show Compiler;
 import '../constants/values.dart';
 import '../common_elements.dart' show CommonElements;
@@ skipping 540 matching lines @@
     return NativeBehavior.ofJsBuiltinCallSend(
         node, reporter, compiler.commonElements, resolver);
   }
 }
 
 class NativeCodegenEnqueuer extends NativeEnqueuerBase {
   final CodeEmitterTask emitter;
 
   final Set<ClassElement> doneAddSubtypes = new Set<ClassElement>();
 
-  NativeCodegenEnqueuer(Compiler compiler, this.emitter)
+  final NativeResolutionEnqueuer _resolutionEnqueuer;
+
+  NativeCodegenEnqueuer(
+      Compiler compiler, this.emitter, this._resolutionEnqueuer)
       : super(compiler, compiler.options.enableNativeLiveTypeAnalysis);
 
   void _processNativeClasses(
       WorldImpactBuilder impactBuilder, Iterable<LibraryElement> libraries) {
     super._processNativeClasses(impactBuilder, libraries);
 
     // HACK HACK - add all the resolved classes.
-    NativeEnqueuerBase enqueuer = compiler.enqueuer.resolution.nativeEnqueuer;
     Set<ClassElement> matchingClasses = new Set<ClassElement>();
-    for (final classElement in enqueuer._registeredClasses) {
+    for (final classElement in _resolutionEnqueuer._registeredClasses) {
       if (_unusedClasses.contains(classElement)) {
         matchingClasses.add(classElement);
       }
     }
     if (matchingClasses.isNotEmpty && _registeredClasses.isEmpty) {
       matchingClasses.addAll(_onFirstNativeClass(impactBuilder));
     }
     _registerTypeUses(impactBuilder, matchingClasses, 'was resolved');
   }
 
@@ skipping 35 matching lines @@
     List<ClassEntity> directSubtypes =
         emitter.directSubtypes.putIfAbsent(superclass, () => <ClassEntity>[]);
     directSubtypes.add(cls);
   }
 
   void logSummary(log(message)) {
     log('Compiled ${_registeredClasses.length} native classes, '
         '${_unusedClasses.length} native classes omitted.');
   }
 }