Change dart2js_foreign suite to use metadata.

dart/tests/compiler/dart2js_foreign/native_parameter_names_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 that parameters in native methods are not mangled. This test is needed
 // until we change all libraries to using the JS foreign element.
 
-class A native "*A" {
-  foo(name) native "return name;";
-  bar(undefined) native "return undefined;";
+@native("*A")
+class A  {
+  @native("return name;")
+  foo(name);
+  @native("return undefined;")
+  bar(undefined);
 }
 
-A makeA() native;
+@native A makeA();
 
-void setup() native """
+@native("""
 function A() {}
 makeA = function(){return new A;};
-""";
+""")
+void setup();
 
 
 main() {
   setup();
   A a = makeA();
   Expect.equals(42, a.foo(42));
   Expect.equals(42, a.bar(42));
 }