Converts some services to use aura-mus

ash/autoclick/mus/autoclick_application.h

Index: ash/autoclick/mus/autoclick_application.h
diff --git a/ash/autoclick/mus/autoclick_application.h b/ash/autoclick/mus/autoclick_application.h
index 2314782f4908aa89978a98c0800fc577242aee7d..c5d9599419a4691298a6183b38e1c4fa56f3709c 100644
--- a/ash/autoclick/mus/autoclick_application.h
+++ b/ash/autoclick/mus/autoclick_application.h
@@ -20,7 +20,6 @@
 namespace views {
 class AuraInit;
 class Widget;
-class WindowManagerConnection;
 }
 
 namespace ash {
@@ -70,7 +69,6 @@ class AutoclickApplication
   mojo::Binding<mojom::AutoclickController> autoclick_binding_;
 
   std::unique_ptr<views::AuraInit> aura_init_;
-  std::unique_ptr<views::WindowManagerConnection> window_manager_connection_;
   std::unique_ptr<AutoclickControllerCommon> autoclick_controller_common_;
   std::unique_ptr<views::Widget> widget_;