[exp] ash: sysui for mash

ash/host/ash_window_tree_host_ozone.cc

Index: ash/host/ash_window_tree_host_ozone.cc
diff --git a/ash/host/ash_window_tree_host_ozone.cc b/ash/host/ash_window_tree_host_ozone.cc
index c6360801833f99147cade5340049fb6348287f66..68700b4ac18e01dddb1ff91b3284da5659a6065c 100644
--- a/ash/host/ash_window_tree_host_ozone.cc
+++ b/ash/host/ash_window_tree_host_ozone.cc
@@ -32,7 +32,7 @@ class AshWindowTreeHostOzone : public AshWindowTreeHost,
   explicit AshWindowTreeHostOzone(const gfx::Rect& initial_bounds);
   ~AshWindowTreeHostOzone() override;
 
- private:
+ protected:
   // AshWindowTreeHost:
   void ToggleFullScreen() override;
   bool ConfineCursorToRootWindow() override;
@@ -54,6 +54,7 @@ class AshWindowTreeHostOzone : public AshWindowTreeHost,
   ui::EventDispatchDetails DispatchKeyEventPostIME(
       ui::KeyEvent* event) override;
 
+ private:
   // Temporarily disable the tap-to-click feature. Used on CrOS.
   void SetTapToClickPaused(bool state);
 
@@ -162,11 +163,4 @@ void AshWindowTreeHostOzone::SetTapToClickPaused(bool state) {
 
 }  // namespace
 
-AshWindowTreeHost* AshWindowTreeHost::Create(
-    const AshWindowTreeHostInitParams& init_params) {
-  if (init_params.offscreen)
-    return new AshWindowTreeHostUnified(init_params.initial_bounds);
-  return new AshWindowTreeHostOzone(init_params.initial_bounds);
-}
-
 }  // namespace ash