Propagates window type properties during aura-mus window creation

ash/mus/property_util.cc

Index: ash/mus/property_util.cc
diff --git a/ash/mus/property_util.cc b/ash/mus/property_util.cc
index 9aa2a9f302be21f12d58b2b0fedade91f8f00b4e..349c2440496849db9e2ce5aa22879fe8a765f4b6 100644
--- a/ash/mus/property_util.cc
+++ b/ash/mus/property_util.cc
@@ -163,6 +163,9 @@ ui::wm::WindowType GetWmWindowType(const ui::Window* window) {
 
     case ui::mojom::WindowType::TOOLTIP:
       return ui::wm::WINDOW_TYPE_TOOLTIP;
+
+    case ui::mojom::WindowType::UNKNOWN:
+      return ui::wm::WINDOW_TYPE_UNKNOWN;
   }
 
   return ui::wm::WINDOW_TYPE_UNKNOWN;