Add @Native(...) annotation for native class names.

tests/compiler/dart2js_native/native_field_invocation3_test.dart

Index: tests/compiler/dart2js_native/native_field_invocation3_test.dart
diff --git a/tests/compiler/dart2js_native/native_field_invocation3_test.dart b/tests/compiler/dart2js_native/native_field_invocation3_test.dart
index 5946db786aa263f452ddcf875697decefb650aae..f0559b6eab542ed441bb3f29be5f0ceb8c061eca 100644
--- a/tests/compiler/dart2js_native/native_field_invocation3_test.dart
+++ b/tests/compiler/dart2js_native/native_field_invocation3_test.dart
@@ -2,6 +2,7 @@
 // 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.
 
+import "dart:_js_helper";
 import "package:expect/expect.dart";
 
 makeCC() native;
@@ -12,7 +13,8 @@ makeCC = function() { return new CC; }
 """;
 
 
-class ClickCounter native "CC" {
+@Native("CC")
+class ClickCounter {
   var status;
 
   var foo;