mash: Port KeyboardUIMus to mojo:ash; remove sysui.

ash/host/ash_window_tree_host_init_params.h

Index: ash/host/ash_window_tree_host_init_params.h
diff --git a/ash/host/ash_window_tree_host_init_params.h b/ash/host/ash_window_tree_host_init_params.h
index bc584d8c69a39a0e38490169a5dc8dea8c9c8fde..cf59bef35eaa95214943abad24f96073426d6b1a 100644
--- a/ash/host/ash_window_tree_host_init_params.h
+++ b/ash/host/ash_window_tree_host_init_params.h
@@ -5,28 +5,14 @@
 #ifndef ASH_HOST_WINDOW_TREE_HOST_INIT_PARAMS_H_
 #define ASH_HOST_WINDOW_TREE_HOST_INIT_PARAMS_H_
 
-#include "build/build_config.h"
-
-#if defined(OS_WIN)
-#include <windows.h>
-#endif
-
 #include "ash/ash_export.h"
 #include "ui/gfx/geometry/rect.h"
 
 namespace ash {
 
 struct ASH_EXPORT AshWindowTreeHostInitParams {
-  AshWindowTreeHostInitParams();
-  ~AshWindowTreeHostInitParams();
-
   gfx::Rect initial_bounds;
-
-  bool offscreen;
-
-#if defined(OS_WIN)
-  HWND remote_hwnd;
-#endif
+  bool offscreen = false;
 };
 
 }  // namespace ash