Converts some services to use aura-mus

ash/touch_hud/mus/touch_hud_application.h

Index: ash/touch_hud/mus/touch_hud_application.h
diff --git a/ash/touch_hud/mus/touch_hud_application.h b/ash/touch_hud/mus/touch_hud_application.h
index 43ebfed3c2343011c7527b0cbc0e8b2f8b9fc2d8..8c45ece4df4f90acb415e907af78cfd259409676 100644
--- a/ash/touch_hud/mus/touch_hud_application.h
+++ b/ash/touch_hud/mus/touch_hud_application.h
@@ -16,7 +16,6 @@
 namespace views {
 class AuraInit;
 class Widget;
-class WindowManagerConnection;
 }
 
 namespace ash {
@@ -47,7 +46,6 @@ class TouchHudApplication
   views::Widget* widget_ = nullptr;
 
   std::unique_ptr<views::AuraInit> aura_init_;
-  std::unique_ptr<views::WindowManagerConnection> window_manager_connection_;
 
   DISALLOW_COPY_AND_ASSIGN(TouchHudApplication);
 };