support the JS builtin

test/codegen/expect/_js_primitives/_js_primitives.js

Index: test/codegen/expect/_js_primitives/_js_primitives.js
diff --git a/test/codegen/expect/_js_primitives/_js_primitives.js b/test/codegen/expect/_js_primitives/_js_primitives.js
index 4112fcd910b6a6ea1baa2624eeea8e0af4ee9be4..af32b2f09ce66623d1c5fa895eb1308c539053fd 100644
--- a/test/codegen/expect/_js_primitives/_js_primitives.js
+++ b/test/codegen/expect/_js_primitives/_js_primitives.js
@@ -3,22 +3,22 @@ var _js_primitives;
   'use strict';
   // Function printString: (String) → void
   function printString(string) {
-    if (_foreign_helper.JS('bool', 'typeof dartPrint == "function"')) {
-      _foreign_helper.JS('void', 'dartPrint(#)', string);
+    if (typeof dartPrint == "function") {
+      dartPrint(string);
       return;
     }
-    if (dart.dbinary(_foreign_helper.JS('bool', 'typeof console == "object"'), '&&', _foreign_helper.JS('bool', 'typeof console.log != "undefined"'))) {
-      _foreign_helper.JS('void', 'console.log(#)', string);
+    if (dart.notNull(typeof console == "object") && dart.notNull(typeof console.log != "undefined")) {
+      console.log(string);
       return;
     }
-    if (_foreign_helper.JS('bool', 'typeof window == "object"')) {
+    if (typeof window == "object") {
       return;
     }
-    if (_foreign_helper.JS('bool', 'typeof print == "function"')) {
-      _foreign_helper.JS('void', 'print(#)', string);
+    if (typeof print == "function") {
+      print(string);
       return;
     }
-    _foreign_helper.JS('void', 'throw "Unable to print message: " + String(#)', string);
+    throw "Unable to print message: " + String(string);
   }
   // Exports:
   _js_primitives.printString = printString;