[exp] ash: Ash in Mus.

ash/host/ash_window_tree_host_x11.cc

Index: ash/host/ash_window_tree_host_x11.cc
diff --git a/ash/host/ash_window_tree_host_x11.cc b/ash/host/ash_window_tree_host_x11.cc
index c6ae8b4ccb58bffc7a99c396644f3695f39149f4..478560c40ec9a4c915d26ff92399a8e3e14d2daf 100644
--- a/ash/host/ash_window_tree_host_x11.cc
+++ b/ash/host/ash_window_tree_host_x11.cc
@@ -35,6 +35,7 @@ namespace ash {
 
 AshWindowTreeHostX11::AshWindowTreeHostX11(const gfx::Rect& initial_bounds)
     : WindowTreeHostX11(initial_bounds), transformer_helper_(this) {
+  CHECK(false);
   transformer_helper_.Init();
   aura::Env::GetInstance()->AddObserver(this);
 }
@@ -290,11 +291,4 @@ void AshWindowTreeHostX11::SetCrOSTapPaused(bool state) {
 }
 #endif
 
-AshWindowTreeHost* AshWindowTreeHost::Create(
-    const AshWindowTreeHostInitParams& init_params) {
-  if (init_params.offscreen)
-    return new AshWindowTreeHostUnified(init_params.initial_bounds);
-  return new AshWindowTreeHostX11(init_params.initial_bounds);
-}
-
 }  // namespace ash