Add set_autohide_systemui to wayland protocol

components/exo/wayland/server.cc

Index: components/exo/wayland/server.cc
diff --git a/components/exo/wayland/server.cc b/components/exo/wayland/server.cc
index 9b6c097c8ae44bbc154f6376e10dc1ab1dbe43b0..9047a00f6930ad703a446e42542314aa0a62d366 100644
--- a/components/exo/wayland/server.cc
+++ b/components/exo/wayland/server.cc
@@ -1978,6 +1978,12 @@ void remote_surface_set_rectangular_surface_shadow(wl_client* client,
   shell_surface->SetRectangularSurfaceShadow(content_bounds);
 }
 
+void remote_surface_set_autohide_systemui(wl_client* client,
+                                          wl_resource* resource,
+                                          uint32_t autohide) {
+  GetUserDataAs<ShellSurface>(resource)->SetAutohideShelf(autohide);
+}
+
 void remote_surface_ack_configure(wl_client* client,
                                   wl_resource* resource,
                                   uint32_t serial) {
@@ -2008,6 +2014,7 @@ const struct zcr_remote_surface_v1_interface remote_surface_implementation = {
     remote_surface_set_system_modal,
     remote_surface_unset_system_modal,
     remote_surface_set_rectangular_surface_shadow,
+    remote_surface_set_autohide_systemui,
     remote_surface_ack_configure,
     remote_surface_move};
 
@@ -2054,7 +2061,7 @@ class WaylandRemoteShell : public WMHelper::MaximizeModeObserver,
   }
 
   bool IsMultiDisplaySupported() const {
-    return wl_resource_get_version(remote_shell_resource_) >= 3;
+    return wl_resource_get_version(remote_shell_resource_) >= 4;
   }
 
   std::unique_ptr<ShellSurface> CreateShellSurface(Surface* surface,