Access NativeData only through ClosedWorld

pkg/compiler/lib/src/js_emitter/interceptor_stub_generator.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 dart2js.js_emitter.interceptor_stub_generator;
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
 
 import '../common_elements.dart';
 import '../constants/values.dart';
@@ skipping 16 matching lines @@
 
 import 'code_emitter_task.dart' show CodeEmitterTask, Emitter;
 
 class InterceptorStubGenerator {
   final CompilerOptions _options;
   final CommonElements _commonElements;
   final CodeEmitterTask _emitterTask;
   final NativeCodegenEnqueuer _nativeCodegenEnqueuer;
   final JavaScriptConstantCompiler _constants;
   final Namer _namer;
-  final NativeData _nativeData;
   final InterceptorData _interceptorData;
   final OneShotInterceptorData _oneShotInterceptorData;
   final CustomElementsCodegenAnalysis _customElementsCodegenAnalysis;
   final CodegenWorldBuilder _codegenWorldBuilder;
   final ClosedWorld _closedWorld;
 
   InterceptorStubGenerator(
       this._options,
       this._commonElements,
       this._emitterTask,
       this._nativeCodegenEnqueuer,
       this._constants,
       this._namer,
-      this._nativeData,
       this._interceptorData,
       this._oneShotInterceptorData,
       this._customElementsCodegenAnalysis,
       this._codegenWorldBuilder,
       this._closedWorld);
 
+  NativeData get _nativeData => _closedWorld.nativeData;
+
   Emitter get _emitter => _emitterTask.emitter;
 
   jsAst.Expression generateGetInterceptorMethod(Set<ClassEntity> classes) {
     jsAst.Expression interceptorFor(ClassEntity cls) {
       return _emitterTask.interceptorPrototypeAccess(cls);
     }
 
     /**
      * Build a JavaScrit AST node for doing a type check on
      * [cls]. [cls] must be a non-native interceptor class.
@@ skipping 382 matching lines @@
         }
 
         var map = new jsAst.ObjectInitializer(properties);
         elements.add(map);
       }
     }
 
     return new jsAst.ArrayInitializer(elements);
   }
 }