VM: Fix TypedefMirror.isPrivate and TypeVariableMirror.isPrivate.

runtime/lib/mirrors_impl.dart

Index: runtime/lib/mirrors_impl.dart
diff --git a/runtime/lib/mirrors_impl.dart b/runtime/lib/mirrors_impl.dart
index 9983abba1410f3288f11f6f7bb3cdefdbc63ff3d..0a7c2db2384bd59eb590b6f39a43e892133b1f43 100644
--- a/runtime/lib/mirrors_impl.dart
+++ b/runtime/lib/mirrors_impl.dart
@@ -958,6 +958,8 @@ abstract class _LocalDeclarationMirror extends _LocalMirror
     return _qualifiedName;
   }
 
+  bool get isPrivate => _n(simpleName).startsWith('_');
+
   List<InstanceMirror> get metadata {
     // Get the metadata objects, convert them into InstanceMirrors using
     // reflect() and then make them into a Dart list.
@@ -987,7 +989,6 @@ class _LocalTypeVariableMirror extends _LocalDeclarationMirror
     return _owner;
   }
 
-  bool get isPrivate => false;
   bool get isStatic => false;
   bool get isTopLevel => false;
 
@@ -1061,7 +1062,6 @@ class _LocalTypedefMirror extends _LocalDeclarationMirror
       : super(reflectee, _s(simpleName));
 
   bool get isTopLevel => true;
-  bool get isPrivate => false;
 
   DeclarationMirror _owner;
   DeclarationMirror get owner {
@@ -1427,8 +1427,6 @@ class _LocalVariableMirror extends _LocalDeclarationMirror
                        this.isConst)
       : super(reflectee, _s(simpleName));
 
-  bool get isPrivate => _n(simpleName).startsWith('_');
-
   bool get isTopLevel => owner is LibraryMirror;
 
   SourceLocation get location {