Support the ignored_by_shelf flag for Mus windows.

components/mus/public/cpp/lib/property_type_converters.cc

Index: components/mus/public/cpp/lib/property_type_converters.cc
diff --git a/components/mus/public/cpp/lib/property_type_converters.cc b/components/mus/public/cpp/lib/property_type_converters.cc
index 9503b9be985f9961a884645c7cd37d292c493236..17cacf1f24991dbc0e13ac13b9f5f1928023b6d1 100644
--- a/components/mus/public/cpp/lib/property_type_converters.cc
+++ b/components/mus/public/cpp/lib/property_type_converters.cc
@@ -189,4 +189,19 @@ SkBitmap TypeConverter<SkBitmap, std::vector<uint8_t>>::Convert(
   return bitmap;
 }
 
+// static
+std::vector<uint8_t> TypeConverter<std::vector<uint8_t>, bool>::Convert(
+    bool input) {
+  std::vector<uint8_t> vec(1);
+  vec[0] = input ? 1 : 0;
+  return vec;
+}
+
+// static
+bool TypeConverter<bool, std::vector<uint8_t>>::Convert(
+    const std::vector<uint8_t>& input) {
+  // Empty vectors are interpreted as false.
+  return !input.empty() && (input[0] == 1);
+}
+
 }  // namespace mojo