Handle ambiguous prefix members.

tests/language/regress_19413_test.dart

Index: tests/language/regress_19413_test.dart
diff --git a/tests/language/metadata_scope2_test.dart b/tests/language/regress_19413_test.dart
similarity index 57%
copy from tests/language/metadata_scope2_test.dart
copy to tests/language/regress_19413_test.dart
index 5bf647ec260754c94b001c430e2ff8f0a9747836..84ff099605353e83273d3816e2fdc56d2f399caa 100644
--- a/tests/language/metadata_scope2_test.dart
+++ b/tests/language/regress_19413_test.dart
@@ -2,14 +2,11 @@
 // 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 a type variable is not in scope for metadata declared on the type
-// declaration.
+// Regression test for issue 19413.
 
-@deprecated
-class Foo
-<deprecated>  /// 01: ok
-{}
+import 'regress_19413_foo.dart' as foo;
+import 'regress_19413_bar.dart' as foo;
 
 main() {
-  Foo f = null;
-}
+  foo.f(); /// 01: static type warning, runtime error
+}