Converts overview to use common ash types

mash/wm/non_client_frame_controller.cc

Index: mash/wm/non_client_frame_controller.cc
diff --git a/mash/wm/non_client_frame_controller.cc b/mash/wm/non_client_frame_controller.cc
index a4c699807f12c510acf9402d0e42a7c02155c67f..e935bdae2af605debafd8439877ecea682ab9610 100644
--- a/mash/wm/non_client_frame_controller.cc
+++ b/mash/wm/non_client_frame_controller.cc
@@ -204,7 +204,8 @@ NonClientFrameController::NonClientFrameController(
     mus::Window* window,
     mus::WindowManagerClient* window_manager_client)
     : widget_(new views::Widget), window_(window) {
-  WmWindowMus::Get(window)->set_widget(widget_);
+  WmWindowMus::Get(window)->set_widget(
+      widget_, WmWindowMus::WidgetCreationType::FOR_CLIENT);
   window_->AddObserver(this);
 
   // To simplify things this code creates a Widget. While a Widget is created