Access NativeData only through ClosedWorld

tests/compiler/dart2js/jsinterop/world_test.dart

Index: tests/compiler/dart2js/jsinterop/world_test.dart
diff --git a/tests/compiler/dart2js/jsinterop/world_test.dart b/tests/compiler/dart2js/jsinterop/world_test.dart
index 1618d07ef0fbb5b21dab57579b04ef4ee27f885d..b25370dfb963770abfa2de3085357c40ff498710 100644
--- a/tests/compiler/dart2js/jsinterop/world_test.dart
+++ b/tests/compiler/dart2js/jsinterop/world_test.dart
@@ -116,26 +116,26 @@ $mainSource
     Expect.equals(E.superclass, Object_);
     Expect.equals(F.superclass, Object_);
 
-    Expect.isFalse(backend.nativeData.isJsInteropClass(Object_));
-    Expect.isTrue(backend.nativeData.isJsInteropClass(A));
-    Expect.isTrue(backend.nativeData.isJsInteropClass(B));
-    Expect.isTrue(backend.nativeData.isJsInteropClass(C));
-    Expect.isTrue(backend.nativeData.isJsInteropClass(D));
-    Expect.isFalse(backend.nativeData.isJsInteropClass(E));
-    Expect.isFalse(backend.nativeData.isJsInteropClass(F));
-
-    Expect.isFalse(backend.nativeData.isAnonymousJsInteropClass(Object_));
-    Expect.isFalse(backend.nativeData.isAnonymousJsInteropClass(A));
-    Expect.isFalse(backend.nativeData.isAnonymousJsInteropClass(B));
-    Expect.isTrue(backend.nativeData.isAnonymousJsInteropClass(C));
-    Expect.isTrue(backend.nativeData.isAnonymousJsInteropClass(D));
-    Expect.isFalse(backend.nativeData.isAnonymousJsInteropClass(E));
-    Expect.isFalse(backend.nativeData.isAnonymousJsInteropClass(F));
-
-    Expect.equals('', backend.nativeData.getJsInteropClassName(A));
-    Expect.equals('BClass', backend.nativeData.getJsInteropClassName(B));
-    Expect.equals('', backend.nativeData.getJsInteropClassName(C));
-    Expect.equals('', backend.nativeData.getJsInteropClassName(D));
+    Expect.isFalse(world.nativeData.isJsInteropClass(Object_));
+    Expect.isTrue(world.nativeData.isJsInteropClass(A));
+    Expect.isTrue(world.nativeData.isJsInteropClass(B));
+    Expect.isTrue(world.nativeData.isJsInteropClass(C));
+    Expect.isTrue(world.nativeData.isJsInteropClass(D));
+    Expect.isFalse(world.nativeData.isJsInteropClass(E));
+    Expect.isFalse(world.nativeData.isJsInteropClass(F));
+
+    Expect.isFalse(world.nativeData.isAnonymousJsInteropClass(Object_));
+    Expect.isFalse(world.nativeData.isAnonymousJsInteropClass(A));
+    Expect.isFalse(world.nativeData.isAnonymousJsInteropClass(B));
+    Expect.isTrue(world.nativeData.isAnonymousJsInteropClass(C));
+    Expect.isTrue(world.nativeData.isAnonymousJsInteropClass(D));
+    Expect.isFalse(world.nativeData.isAnonymousJsInteropClass(E));
+    Expect.isFalse(world.nativeData.isAnonymousJsInteropClass(F));
+
+    Expect.equals('', world.nativeData.getJsInteropClassName(A));
+    Expect.equals('BClass', world.nativeData.getJsInteropClassName(B));
+    Expect.equals('', world.nativeData.getJsInteropClassName(C));
+    Expect.equals('', world.nativeData.getJsInteropClassName(D));
 
     for (String name in classEnvironment.keys) {
       ClassElement cls = classEnvironment[name];