Change dart2js_foreign suite to use metadata.

dart/tests/compiler/dart2js_foreign/native_class_inheritance2_test.dart

 // Copyright (c) 2011, 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.
 
 // Test to see if resolving a hidden native class's method interferes with
 // subsequent resolving the subclass's method.  This might happen if the
 // superclass caches the method in the prototype, so shadowing the dispatcher
 // stored on Object.prototype.
 
-class A native "*A" {
-  foo([a=100]) native;
+@native("*A")
+class A  {
+  @native foo([a=100]);
 }
 
-class B extends A native "*B" {
+@native("*B")
+class B extends A  {
 }
 
-class C extends B native "*C" {
-  foo([z=300]) native;
+@native("*C")
+class C extends B  {
+  @native foo([z=300]);
 }
 
-class D extends C native "*D" {
+@native("*D")
+class D extends C  {
 }
 
-makeA() native;
-makeB() native;
-makeC() native;
-makeD() native;
+@native makeA();
+@native makeB();
+@native makeC();
+@native makeD();
 
-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__) {
     child.prototype.__proto__ = parent.prototype;
   } else {
     function tmp() {};
     tmp.prototype = parent.prototype;
     child.prototype = new tmp();
     child.prototype.constructor = child;
   }
 }
 
 function A(){}
 function B(){}
 inherits(B, A);
 function C(){}
 inherits(C, B);
 function D(){}
 inherits(D, C);
 
 A.prototype.foo = function(a){return 'A.foo(' + a + ')';}
 C.prototype.foo = function(z){return 'C.foo(' + z + ')';}
 
 makeA = function(){return new A};
 makeB = function(){return new B};
 makeC = function(){return new C};
 makeD = function(){return new D};
-""";
+""")
+void setup();
 
 
 main() {
   setup();
 
   var a = makeA();
   var b = makeB();
   var c = makeC();
   var d = makeD();
 
   Expect.equals('A.foo(100)', b.foo());
   Expect.equals('C.foo(300)', d.foo());
   // If the above line fails with C.foo(100) then the dispatch to fill in the
   // default got the wrong one, followed by a second dispatch that resolved to
   // the correct native method.
 
   Expect.equals('A.foo(1)', a.foo(1));
   Expect.equals('A.foo(2)', b.foo(2));
   Expect.equals('C.foo(3)', c.foo(3));
   Expect.equals('C.foo(4)', d.foo(4));
 }