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

tests/compiler/dart2js_native/error_safeToString_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.
 
 import "native_testing.dart";
 import 'dart:_foreign_helper' show JS_INTERCEPTOR_CONSTANT;
 import 'dart:_interceptors'
     show
         Interceptor,
         JavaScriptObject,
@@ skipping 15 matching lines @@
 
 makeA() native;
 makeB() native;
 makeC() native;
 makeD() native;
 makeE() native;
 makeP() native;
 makeQ() native;
 makeR() native;
 
-void setup() native r"""
-makeA = function(){return {hello: 123};};
+void setup() {
+  JS('', r"""
+(function(){
+  makeA = function(){return {hello: 123};};
 
-function BB(){}
-makeB = function(){return new BB();};
+  function BB(){}
+  makeB = function(){return new BB();};
 
-function CC(){}
-makeC = function(){
-  var x = new CC();
-  x.constructor = null;  // Foils constructor lookup.
-  return x;
-};
+  function CC(){}
+  makeC = function(){
+    var x = new CC();
+    x.constructor = null;  // Foils constructor lookup.
+    return x;
+  };
 
-function DD(){}
-makeD = function(){
-  var x = new DD();
-  x.constructor = {name: 'DDxxx'};  // Foils constructor lookup.
-  return x;
-};
+  function DD(){}
+  makeD = function(){
+    var x = new DD();
+    x.constructor = {name: 'DDxxx'};  // Foils constructor lookup.
+    return x;
+  };
 
-function EE(){}
-makeE = function(){
-  var x = new EE();
-  x.constructor = function Liar(){};  // Looks like a legitimate constructor.
-  return x;
-};
+  function EE(){}
+  makeE = function(){
+    var x = new EE();
+    x.constructor = function Liar(){};  // Looks like a legitimate constructor.
+    return x;
+  };
 
-function PPPP(){}
-makeP = function(){return new PPPP();};
+  function PPPP(){}
+  makeP = function(){return new PPPP();};
 
-function QQQQ(){}
-makeQ = function(){return new QQQQ();};
+  function QQQQ(){}
+  makeQ = function(){return new QQQQ();};
 
-function RRRR(){}
-makeR = function(){return new RRRR();};
+  function RRRR(){}
+  makeR = function(){return new RRRR();};
 
-self.nativeConstructor(PPPP);
-self.nativeConstructor(QQQQ);
-self.nativeConstructor(RRRR);
-""";
+  self.nativeConstructor(PPPP);
+  self.nativeConstructor(QQQQ);
+  self.nativeConstructor(RRRR);
+})()""");
+}
 
 expectTypeName(expectedName, s) {
   var m = new RegExp(r"Instance of '(.*)'").firstMatch(s);
   Expect.isNotNull(m);
   var name = m.group(1);
   Expect.isTrue(expectedName == name || name.length <= 3,
       "Is '$expectedName' or minified: '$name'");
 }
 
 final plainJsString =
@@ skipping 74 matching lines @@
 }
 
 main() {
   nativeTesting();
   setup();
 
   testDistinctInterceptors();
   testExternal();
   testNative();
 }