dart2js_native tests: Migrate 'native STRING' to JS-calls - part 2/2

tests/compiler/dart2js_native/issue9182_test.dart

 // Copyright (c) 2013, 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.
 
 // Regression test for Issue 9182.  The generative constructor body function
 // should not have the interceptor calling convention.
 
 import "native_testing.dart";
 
 @Native("A")
 class Foo {
   factory Foo() => makeA();
   // Ensure the instance method 'Bar' uses interceptor convention.
   Bar() => 123;
 }
 
 class Bar {
   var _x, _y;
   // Generative constructor with body, having the same name as interceptor
   // convention instance member.
   Bar(x, y) {
     _x = x;
     _y = y;
   }
 }
 
-void setup() native r"""
-function A(){}
-makeA = function() { return new A; };
-self.nativeConstructor(A);
-""";
+void setup() {
+  JS('', r"""
+(function(){
+  function A(){}
+  makeA = function() { return new A() };
+  self.nativeConstructor(A);
+})()""");
+}
 
 makeA() native;
 
 main() {
   nativeTesting();
   setup();
 
   var foo = confuse(new Foo());
   var bar = confuse(new Bar(30, 40));
 
   Expect.equals(123, foo.Bar()); // Ensure that Foo.Bar is used.
 
   Expect.equals(30, bar._x);
   Expect.equals(40, bar._y);
 }