Make TypedefMirror a direct descendant of TypeMirror.

tests/lib/mirrors/typevariable_mirror_metadata_test.dart

Index: tests/lib/mirrors/typevariable_mirror_metadata_test.dart
diff --git a/tests/lib/mirrors/typevariable_mirror_metadata_test.dart b/tests/lib/mirrors/typevariable_mirror_metadata_test.dart
index aa59870a9ba375c9cff5dfc880ef086b712e5e87..1e704e58d6c93781b7d439cb1758794bb371b18b 100644
--- a/tests/lib/mirrors/typevariable_mirror_metadata_test.dart
+++ b/tests/lib/mirrors/typevariable_mirror_metadata_test.dart
@@ -42,7 +42,7 @@ main() {
   // Check for conflicts.
   checkMetadata(cm.members[#T], [m1, m2]);
 
-  TypedefMirror tm = reflectClass(Predicate);
+  TypedefMirror tm = reflectType(Predicate);
   FunctionTypeMirror ftm = tm.referent;
   checkMetadata(ftm.typeVariables[0], [m1, m2]);

[gbracha, 2013/10/02 22:49:53]

The referent of Predicate is a function type G-> bool which has no type
variables,

[rmacnak, 2013/10/03 17:24:47]

Done. Strange this was working in the VM...

 }