Change dart2js_foreign suite to use metadata.

dart/tests/compiler/dart2js_foreign/native_method_rename3_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 the feature where the native string declares the native method's name.
 // #3. The name does not get
 
-class A native "*A" {
-  int foo() native 'fooA';
+@native("*A")
+class A  {
+  @native('fooA')
+  int foo();
 }
 
-class B extends A native "*B" {
-  int foo() native 'fooB';
+@native("*B")
+class B extends A  {
+  @native('fooB')
+  int foo();
   int fooA() => 333;
 }
 
 class Decoy {
   int fooA() => 666;
   int fooB() => 999;
 }
 
-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__) {
     child.prototype.__proto__ = parent.prototype;
   } else {
     function tmp() {};
     tmp.prototype = parent.prototype;
     child.prototype = new tmp();
     child.prototype.constructor = child;
   }
 }
 function A(){}
 A.prototype.fooA = function(){return 100;};
 function B(){}
 inherits(B, A);
 B.prototype.fooB = function(){return 200;};
 
 makeA = function(){return new A};
 makeB = function(){return new B};
-""";
+""")
+void setup();
 
 testDynamic() {
   var things = [makeA(), makeB(), new Decoy()];
   var a = things[0];
   var b = things[1];
   var d = things[2];
 
   Expect.equals(100, a.foo());
   Expect.equals(200, b.foo());
   Expect.equals(666, d.fooA());
@@ skipping 27 matching lines @@
 expectNoSuchMethod(action, note) {
   bool caught = false;
   try {
     action();
   } catch (NoSuchMethodException ex) {
     caught = true;
     Expect.isTrue(ex is NoSuchMethodException, note);
   }
   Expect.isTrue(caught, note);
 }