Support the ignored_by_shelf flag for Mus windows.

components/mus/public/cpp/property_type_converters.h

Index: components/mus/public/cpp/property_type_converters.h
diff --git a/components/mus/public/cpp/property_type_converters.h b/components/mus/public/cpp/property_type_converters.h
index 20c0768a5f102ee5e766138971b7a2fdb612e053..5676253e8108fc3a53746a9f5f2127f92b002ef0 100644
--- a/components/mus/public/cpp/property_type_converters.h
+++ b/components/mus/public/cpp/property_type_converters.h
@@ -82,6 +82,15 @@ struct TypeConverter<SkBitmap, std::vector<uint8_t>> {
   static SkBitmap Convert(const std::vector<uint8_t>& input);
 };
 
+template <>
+struct TypeConverter<std::vector<uint8_t>, bool> {
+  static std::vector<uint8_t> Convert(bool input);
+};
+template <>
+struct TypeConverter<bool, std::vector<uint8_t>> {
+  static bool Convert(const std::vector<uint8_t>& input);
+};
+
 }  // namespace mojo
 
 #endif  // COMPONENTS_MUS_PUBLIC_CPP_PROPERTY_TYPE_CONVERTERS_H_