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

tests/compiler/dart2js_native/oddly_named_fields_test.dart

 // Copyright (c) 2013, 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.
 
 import 'dart:_js_helper';
 
 // JavaScript reserved words:
 //
 // break
 // case
@@ skipping 43 matching lines @@
 //
 // Funny thing in JavaScript: there are two syntactic categories:
 // "Identifier" and "IdentifierName".  The latter includes reserved
 // words.  This is legal JavaScript according to ECMA-262.5:
 //
 //    this.default
 //
 // See section 11.2 "Left-Hand-Side Expressions" which states that a
 // "MemberExpression" includes: "MemberExpression . IdentifierName".
 
-class NativeClassWithOddNames native "NativeClassWithOddNames" {
+@Native("NativeClassWithOddNames")
+class NativeClassWithOddNames {
   @JSName('break') bool breakValue;
   @JSName('case') bool caseValue;
   @JSName('catch') bool catchValue;
   @JSName('class') bool classValue;
   @JSName('const') bool constValue;
   @JSName('continue') bool continueValue;
   @JSName('debugger') bool debuggerValue;
   @JSName('default') bool defaultValue;
   @JSName('delete') bool deleteValue;
   @JSName('do') bool doValue;
@@ skipping 1303 matching lines @@
 
 main() {
   setup();
   var object = makeNativeClassWithOddNames();
   object.testMyFields();
   testObjectStronglyTyped(object);
   testObjectWeaklyTyped([object]);
   testObjectWeaklyTyped(['fisk']);
   testObjectWeaklyTyped([new ClassWithOddNames()..testMyFields()]);
 }