Remove usages of XInternAtom

ui/views/widget/desktop_aura/x11_desktop_handler.h

Index: ui/views/widget/desktop_aura/x11_desktop_handler.h
diff --git a/ui/views/widget/desktop_aura/x11_desktop_handler.h b/ui/views/widget/desktop_aura/x11_desktop_handler.h
index 00484b2e4e1f7550d90cbdf29507adaad40d5a4d..ab0c4cbbed7ec1097af7fba31513b8a99f8eab06 100644
--- a/ui/views/widget/desktop_aura/x11_desktop_handler.h
+++ b/ui/views/widget/desktop_aura/x11_desktop_handler.h
@@ -17,7 +17,6 @@
 #include "ui/aura/env_observer.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
 #include "ui/events/platform/x11/x11_event_source.h"
-#include "ui/gfx/x/x11_atom_cache.h"
 #include "ui/gfx/x/x11_types.h"
 #include "ui/views/views_export.h"
 #include "ui/views/widget/desktop_aura/x11_desktop_handler_observer.h"
@@ -81,8 +80,6 @@ class VIEWS_EXPORT X11DesktopHandler : public ui::PlatformEventDispatcher,
   // Events selected on x_root_window_.
   std::unique_ptr<ui::XScopedEventSelector> x_root_window_events_;
 
-  ui::X11AtomCache atom_cache_;
-
   base::ObserverList<X11DesktopHandlerObserver> observers_;
 
   std::string workspace_;