X11: Remove calls to XSelectInput

ui/events/platform/x11/x11_event_source.h

Index: ui/events/platform/x11/x11_event_source.h
diff --git a/ui/events/platform/x11/x11_event_source.h b/ui/events/platform/x11/x11_event_source.h
index bd925027856034e64c30dee5786a9a07486f7a15..cf4051517a0a5cd24c13a4643f1c7724fdf0c11b 100644
--- a/ui/events/platform/x11/x11_event_source.h
+++ b/ui/events/platform/x11/x11_event_source.h
@@ -21,6 +21,7 @@ using XWindow = unsigned long;
 namespace ui {
 
 class X11HotplugEventHandler;
+class XScopedEventSelector;
 
 // Responsible for notifying X11EventSource when new XEvents are available and
 // processing/dispatching XEvents. Implementations will likely be a
@@ -111,6 +112,7 @@ class EVENTS_EXPORT X11EventSource {
   bool dummy_initialized_;
   XWindow dummy_window_;
   XAtom dummy_atom_;
+  std::unique_ptr<XScopedEventSelector> dummy_window_events_;
 
   // Keeps track of whether this source should continue to dispatch all the
   // available events.