Access NativeData only through ClosedWorld

pkg/compiler/lib/src/js_emitter/full_emitter/emitter.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.full_emitter;
 
 import 'dart:collection' show HashMap;
 import 'dart:convert';
 
 import 'package:js_runtime/shared/embedded_names.dart' as embeddedNames;
@@ skipping 26 matching lines @@
 import '../../js/js.dart' as jsAst;
 import '../../js/js.dart' show js;
 import '../../js_backend/js_backend.dart'
     show
         ConstantEmitter,
         JavaScriptBackend,
         JavaScriptConstantCompiler,
         Namer,
         SetterName,
         TypeVariableCodegenAnalysis;
+import '../../js_backend/native_data.dart';
 import '../../universe/call_structure.dart' show CallStructure;
 import '../../universe/selector.dart' show Selector;
 import '../../universe/world_builder.dart' show CodegenWorldBuilder;
 import '../../util/uri_extras.dart' show relativize;
 import '../../world.dart' show ClosedWorld;
 import '../constant_ordering.dart' show deepCompareConstants;
 import '../headers.dart';
 import '../js_emitter.dart' hide Emitter, EmitterFactory;
 import '../js_emitter.dart' as js_emitter show Emitter, EmitterFactory;
 import '../model.dart';
@@ skipping 29 matching lines @@
   Emitter createEmitter(
       CodeEmitterTask task, Namer namer, ClosedWorld closedWorld) {
     return new Emitter(task.compiler, namer, closedWorld, generateSourceMap,
         task, task.sorter);
   }
 }
 
 class Emitter implements js_emitter.Emitter {
   final Compiler compiler;
   final CodeEmitterTask task;
+  final ClosedWorld _closedWorld;
 
   // The following fields will be set to copies of the program-builder's
   // collector.
   Map<OutputUnit, List<FieldEntity>> outputStaticNonFinalFieldLists;
   Map<OutputUnit, Set<LibraryEntity>> outputLibraryLists;
   List<TypedefElement> typedefsNeededForReflection;
 
   final ContainerBuilder containerBuilder = new ContainerBuilder();
   final ClassEmitter classEmitter;
   final NsmEmitter nsmEmitter;
@@ skipping 58 matching lines @@
    *
    * See [getElementDescriptor].
    */
   // TODO(ahe): Generate statics with their class, and store only libraries in
   // this map.
   final Map<Fragment, Map<Element, ClassBuilder>> elementDescriptors =
       new Map<Fragment, Map<Element, ClassBuilder>>();
 
   final bool generateSourceMap;
 
-  Emitter(Compiler compiler, Namer namer, ClosedWorld closedWorld,
-      this.generateSourceMap, this.task, this._sorter)
-      : this.compiler = compiler,
-        this.namer = namer,
-        classEmitter = new ClassEmitter(closedWorld),
-        interceptorEmitter = new InterceptorEmitter(closedWorld),
-        nsmEmitter = new NsmEmitter(closedWorld) {
+  Emitter(this.compiler, this.namer, this._closedWorld, this.generateSourceMap,
+      this.task, this._sorter)
+      : classEmitter = new ClassEmitter(_closedWorld),
+        interceptorEmitter = new InterceptorEmitter(_closedWorld),
+        nsmEmitter = new NsmEmitter(_closedWorld) {
     constantEmitter = new ConstantEmitter(
         compiler, namer, this.constantReference, constantListGenerator);
     containerBuilder.emitter = this;
     classEmitter.emitter = this;
     nsmEmitter.emitter = this;
     interceptorEmitter.emitter = this;
   }
 
   DiagnosticReporter get reporter => compiler.reporter;
 
+  NativeData get _nativeData => _closedWorld.nativeData;
+
   List<jsAst.Node> cspPrecompiledFunctionFor(OutputUnit outputUnit) {
     return _cspPrecompiledFunctions.putIfAbsent(
         outputUnit, () => new List<jsAst.Node>());
   }
 
   List<jsAst.Expression> cspPrecompiledConstructorNamesFor(
       OutputUnit outputUnit) {
     return _cspPrecompiledConstructorNames.putIfAbsent(
         outputUnit, () => new List<jsAst.Expression>());
   }
@@ skipping 1440 matching lines @@
     if (backend.backendUsage.requiresPreamble && !backend.htmlLibraryIsLoaded) {
       reporter.reportHintMessage(NO_LOCATION_SPANNABLE, MessageKind.PREAMBLE);
     }
     // Return the total program size.
     return outputBuffers.values.fold(0, (a, b) => a + b.length);
   }
 
   ClassBuilder getStaticMethodDescriptor(
       MethodElement element, Fragment fragment) {
     Element owner = element.library;
-    if (!backend.nativeData.isNativeMember(element)) {
+    if (!_nativeData.isNativeMember(element)) {
       // For static (not top level) elements, record their code in a buffer
       // specific to the class. For now, not supported for native classes and
       // native elements.
       ClassElement cls = element.enclosingClass;
       if (compiler.codegenWorldBuilder.directlyInstantiatedClasses
               .contains(cls) &&
-          !backend.nativeData.isNativeClass(cls) &&
+          !_nativeData.isNativeClass(cls) &&
           compiler.deferredLoadTask.outputUnitForElement(element) ==
               compiler.deferredLoadTask.outputUnitForElement(cls)) {
         owner = cls;
       }
     }
     return _getElementDescriptor(element, owner, fragment);
   }
 
   ClassBuilder getLibraryDescriptor(LibraryElement element, Fragment fragment) {
     return _getElementDescriptor(element, element, fragment);
@@ skipping 259 matching lines @@
     // data.
     mapping["_comment"] = "This mapping shows which compiled `.js` files are "
         "needed for a given deferred library import.";
     mapping.addAll(compiler.deferredLoadTask.computeDeferredMap());
     compiler.outputProvider(
         compiler.options.deferredMapUri.path, '', OutputType.info)
       ..add(const JsonEncoder.withIndent("  ").convert(mapping))
       ..close();
   }
 }