Access BackendUsage through ClosedWorld

pkg/compiler/lib/src/js_emitter/startup_emitter/fragment_emitter.dart

 // Copyright (c) 2015, 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.
 
 part of dart2js.js_emitter.startup_emitter.model_emitter;
 
 /// The name of the property that stores the tear-off getter on a static
 /// function.
 ///
 /// This property is only used when isolates are used.
@@ skipping 469 matching lines @@
  * loaded dynamically when a deferred library is loaded.
  *
  * This class is stateless and can be reused for different fragments.
  */
 class FragmentEmitter {
   final Compiler compiler;
   final Namer namer;
   final JavaScriptBackend backend;
   final ConstantEmitter constantEmitter;
   final ModelEmitter modelEmitter;
-  final InterceptorData _interceptorData;
+  final ClosedWorld _closedWorld;
 
   FragmentEmitter(this.compiler, this.namer, this.backend, this.constantEmitter,
-      this.modelEmitter, this._interceptorData);
+      this.modelEmitter, this._closedWorld);
+
+  InterceptorData get _interceptorData => _closedWorld.interceptorData;
 
   js.Expression generateEmbeddedGlobalAccess(String global) =>
       modelEmitter.generateEmbeddedGlobalAccess(global);
 
   js.Expression generateConstantReference(ConstantValue value) =>
       modelEmitter.generateConstantReference(value);
 
   js.Expression classReference(Class cls) {
     return js.js('#.#', [cls.holder.name, cls.name]);
   }
@@ skipping 999 matching lines @@
   /// JavaScript object literals that contain all the information directly.
   /// This means that the output size is bigger, but that the startup is faster.
   ///
   /// This function is the static equivalent of
   /// [NativeGenerator.buildNativeInfoHandler].
   js.Statement emitNativeSupport(Fragment fragment) {
     List<js.Statement> statements = <js.Statement>[];
 
     // The isolate-affinity tag must only be initialized once per program.
     if (fragment.isMainFragment &&
-        NativeGenerator.needsIsolateAffinityTagInitialization(backend)) {
+        NativeGenerator
+            .needsIsolateAffinityTagInitialization(_closedWorld.backendUsage)) {
       statements.add(NativeGenerator.generateIsolateAffinityTagInitialization(
-          backend,
+          _closedWorld.backendUsage,
           generateEmbeddedGlobalAccess,
           js.js(
               """
         // On V8, the 'intern' function converts a string to a symbol, which
         // makes property access much faster.
         function (s) {
           var o = {};
           o[s] = 1;
           return Object.keys(convertToFastObject(o))[0];
         }""",
@@ skipping 34 matching lines @@
     }
     statements.add(js.js.statement("setOrUpdateInterceptorsByTag(#);",
         js.objectLiteral(interceptorsByTag)));
     statements.add(
         js.js.statement("setOrUpdateLeafTags(#);", js.objectLiteral(leafTags)));
     statements.addAll(subclassAssignments);
 
     return wrapPhase('nativeSupport', statements);
   }
 }