Makes WindowTreeHostMus supply properties directly to window creation

ui/aura/mus/window_tree_host_mus.cc

Index: ui/aura/mus/window_tree_host_mus.cc
diff --git a/ui/aura/mus/window_tree_host_mus.cc b/ui/aura/mus/window_tree_host_mus.cc
index 3fb232b8d427e9082a632cbb360d637f7464d81c..ba6e05f5e07346442d76eb37c7b5b6803ee46d67 100644
--- a/ui/aura/mus/window_tree_host_mus.cc
+++ b/ui/aura/mus/window_tree_host_mus.cc
@@ -84,12 +84,16 @@ WindowTreeHostMus::WindowTreeHostMus(
   compositor()->SetVisible(false);
 }
 
+// Pass |properties| to CreateWindowPortForTopLevel() so that |properties|
+// are passed to the server *and* pass |properties| to the WindowTreeHostMus
+// constructor (above) which applies the properties to the Window. Some of the
+// properties may be server specific and not applied to the Window.
 WindowTreeHostMus::WindowTreeHostMus(
     WindowTreeClient* window_tree_client,
     const std::map<std::string, std::vector<uint8_t>>* properties)
     : WindowTreeHostMus(
           static_cast<WindowTreeHostMusDelegate*>(window_tree_client)
-              ->CreateWindowPortForTopLevel(),
+              ->CreateWindowPortForTopLevel(properties),
           window_tree_client,
           display::Screen::GetScreen()->GetPrimaryDisplay().id(),
           properties) {}