Change dart2js_foreign suite to use metadata.

dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart

Index: dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart
diff --git a/dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart b/dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart
index a37b2250dae7d1b641b829262609e29c8377ef74..8cf1ceb205546542ba14b447b1979f9c7e3bdea9 100644
--- a/dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart
+++ b/dart/tests/compiler/dart2js_foreign/native_call_arity3_test.dart
@@ -6,21 +6,23 @@
 // parameters set to null. These parameters should be treated as if they
 // do not have a default value for the native methods.
 
-class A native "*A" {
-  int foo(int x) native;
+@native("*A")
+class A  {
+  @native int foo(int x);
 }
 
-class B native "*B" {
-  int foo([x = null, y, z = null]) native;
+@native("*B")
+class B  {
+  @native int foo([x = null, y, z = null]);
 }
 
 // TODO(sra): Add a case where the parameters have default values.  Wait until
 // dart:dom_deprecated / dart:html need non-null default values.
 
-A makeA() native { return new A(); }
-B makeB() native { return new B(); }
+@native A makeA() { return new A(); }
+@native B makeB() { return new B(); }
 
-void setup() native """
+@native("""
 function A() {}
 A.prototype.foo = function () { return arguments.length; };
 
@@ -29,7 +31,8 @@ B.prototype.foo = function () { return arguments.length; };
 
 makeA = function(){return new A;};
 makeB = function(){return new B;};
-""";
+""")
+void setup();
 
 
 testDynamicContext() {