Support raw types in metadata.

tests/language/generic_metadata_test.dart

 // Copyright (c) 2016, 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 "package:expect/expect.dart";
-
-class A<T> {}
+ 
+// Check that annotations cannot use type arguments, but can be raw.
 
 class C<T> {
-  a() {
-    return () => new A<T>();
-  }
+  const C();
 }
 
-main() {
-  Expect.isTrue(new C<int>().a()() is A<int>);
-  Expect.isFalse(new C<int>().a()() is A<String>);
-}
+@C()          /// 01: ok
+@C<dynamic>() /// 02: compile-time error
+@C<int>()     /// 03: compile-time error
+main() {}