Add WindowPinType property on arua::Window

ui/aura/mus/property_converter.cc

Index: ui/aura/mus/property_converter.cc
diff --git a/ui/aura/mus/property_converter.cc b/ui/aura/mus/property_converter.cc
index c9a4138b3388c92d333a5cdbd3690d8599e6ed9a..e6ae0cc68cd9fd611211f16f6b32cd7645235d8d 100644
--- a/ui/aura/mus/property_converter.cc
+++ b/ui/aura/mus/property_converter.cc
@@ -49,6 +49,12 @@ bool ValidateShowState(int64_t value) {
          value == int64_t(ui::mojom::ShowState::FULLSCREEN);
 }
 
+bool ValidateWindowPinType(int64_t value) {
+  return value == int64_t(ui::mojom::WindowPinType::NONE) ||
+         value == int64_t(ui::mojom::WindowPinType::PINNED) ||
+         value == int64_t(ui::mojom::WindowPinType::TRUSTED_PINNED);
+}
+
 }  // namespace
 
 PropertyConverter::PrimitiveProperty::PrimitiveProperty() {}
@@ -89,6 +95,9 @@ PropertyConverter::PropertyConverter() {
                    base::Bind(&ValidateShowState));
   RegisterProperty(client::kWindowIconKey,
                    ui::mojom::WindowManager::kWindowIcon_Property);
+  RegisterProperty(client::kWindowPinTypeKey,
+                   ui::mojom::WindowManager::kWindowPinType_Property,
+                   base::Bind(&ValidateWindowPinType));
   RegisterProperty(client::kTitleKey,
                    ui::mojom::WindowManager::kWindowTitle_Property);
 }