Hoist hasReflectedType and reflectedType from ClassMirror to TypeMirror.

sdk/lib/_internal/lib/js_mirrors.dart

Index: sdk/lib/_internal/lib/js_mirrors.dart
diff --git a/sdk/lib/_internal/lib/js_mirrors.dart b/sdk/lib/_internal/lib/js_mirrors.dart
index 3e781a37e81342efe45bc8771bcd203885bb6bf8..2f2069bbae94b08857ad4d2f14612a64299a0fd1 100644
--- a/sdk/lib/_internal/lib/js_mirrors.dart
+++ b/sdk/lib/_internal/lib/js_mirrors.dart
@@ -2367,6 +2367,10 @@ class JsTypedefMirror extends JsDeclarationMirror implements TypedefMirror {
 
   String get _prettyName => 'TypedefMirror';
 
+  bool get hasReflectedType => throw new UnimplementedError();
+
+  Type get reflectedType => throw new UnimplementedError();
+
   // TODO(ahe): Implement this method.
   List<TypeVariableMirror> get typeVariables => throw new UnimplementedError();