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

tests/compiler/dart2js_native/static_methods_test.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.
 
 // Accessing static native methods names:
 //   plain declaration ->  use @Native tag as 'scope' for declared name.
 //   identifier @JSName -> use @Native tag as 'scope' for @JSName.
 //   other @JSName -> use @JSName as an expression.
 
 import 'native_testing.dart';
@@ skipping 19 matching lines @@
   static int lepton(Callback c) native;
   static int electron(c) => lepton(c);
 
   // Compiler should automatically use the tag and JSName, i.e. call
   // `CC.baryon`.
   @JSName('baryon')
   static int _baryon(Callback c) native;
   static int proton(c) => _baryon(c);
 }
 
-void setup() native r"""
-// This code is all inside 'setup' and so not accessible from the global scope.
+void setup() {
+  JS('', r"""
+(function(){
+  // This code is inside 'setup' and so not accessible from the global scope.
 
-function CC(){}
+  function CC(){}
 
-CC.foo = function(s) { return s.length; }
-CC.bar = function(f) { return f("Bye"); }
-CC.lepton = function(f) { return f("Lepton"); }
-CC.baryon = function(f) { return f("three quarks"); }
+  CC.foo = function(s) { return s.length; };
+  CC.bar = function(f) { return f("Bye"); };
+  CC.lepton = function(f) { return f("Lepton"); };
+  CC.baryon = function(f) { return f("three quarks"); };
 
-self.CC = CC;
-""";
+  self.CC = CC;
+})()""");
+}
 
 main() {
   nativeTesting();
   setup();
 
   // TODO(sra): Investigate why this line is necessary to get a correctly
   // compiled convertDartClosureToJS.  Without this line, the compiler crashes.
   convertDartClosureToJS(main, 1);
 
   Expect.equals(5, AA.foo("Hello"));
 
   Expect.equals(3, AA.bar((s) => s.length));
   Expect.equals(3, AA.baz((s) => s.length));
 
   Expect.equals(6, AA.lepton((s) => s.length));
   Expect.equals(6, AA.electron((s) => s.length));
 
   Expect.equals(12, AA._baryon((s) => s.length));
   Expect.equals(12, AA.proton((s) => s.length));
   Expect.throws(() => AA.baryon((s) => s.length)); // Not defined on AA.
 }