Further reduce use of Compiler.closedWorld.

tests/compiler/dart2js/simple_inferrer_final_field3_test.dart

Index: tests/compiler/dart2js/simple_inferrer_final_field3_test.dart
diff --git a/tests/compiler/dart2js/simple_inferrer_final_field3_test.dart b/tests/compiler/dart2js/simple_inferrer_final_field3_test.dart
index 7eeefaefec6096275f48853e8329675d2938572f..c321c54ca2f0f0bd09ecf83064cb990e4c6f142f 100644
--- a/tests/compiler/dart2js/simple_inferrer_final_field3_test.dart
+++ b/tests/compiler/dart2js/simple_inferrer_final_field3_test.dart
@@ -28,15 +28,16 @@ void main() {
   var compiler = compilerFor(TEST, uri);
   asyncTest(() => compiler.run(uri).then((_) {
         var typesInferrer = compiler.globalInference.typesInferrerInternal;
+        var closedWorld = typesInferrer.closedWorld;
 
         checkFieldTypeInClass(String className, String fieldName, type) {
           var cls = findElement(compiler, className);
           var element = cls.lookupLocalMember(fieldName);
           Expect.equals(type,
-              simplify(typesInferrer.getTypeOfElement(element), compiler));
+              simplify(typesInferrer.getTypeOfElement(element), closedWorld));
         }
 
-        checkFieldTypeInClass('A', 'dynamicField',
-            findTypeMask(compiler, 'Interceptor', 'nonNullSubclass'));
+        checkFieldTypeInClass(
+            'A', 'dynamicField', closedWorld.commonMasks.interceptorType);
       }));
 }