Change dart2js_foreign suite to use metadata.

dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart

Index: dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart
diff --git a/dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart b/dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart
index afd6e32fed9dced203ff03c39ef8580c3c9c890b..cae73e798bc8d1695dd326aa7d5dc147edd0ab28 100644
--- a/dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart
+++ b/dart/tests/compiler/dart2js_foreign/native_class_is_check3_test.dart
@@ -14,19 +14,21 @@ interface I extends J {
 
 // Native implementation.
 
-class A implements I native "*A" {
+@native("*A")
+class A implements I  {
   // The native class accepts only other native instances.
-  A read() native;
-  write(A x) native;
+  @native A read();
+  @native write(A x);
 }
 
-class B extends A native "*B" {
+@native("*B")
+class B extends A  {
 }
 
-makeA() native;
-makeB() native;
+@native makeA();
+@native makeB();
 
-void setup() native """
+@native("""
 // This code is all inside 'setup' and so not accesible from the global scope.
 function inherits(child, parent) {
   if (child.prototype.__proto__) {
@@ -45,7 +47,8 @@ A.prototype.read = function() { return this._x; };
 A.prototype.write = function(x) { this._x = x; };
 makeA = function(){return new A};
 makeB = function(){return new B};
-""";
+""")
+void setup();
 
 class C {}