Revert "Fixed first step of scrolling not applying"

ui/events/platform/x11/x11_event_source.cc

Index: ui/events/platform/x11/x11_event_source.cc
diff --git a/ui/events/platform/x11/x11_event_source.cc b/ui/events/platform/x11/x11_event_source.cc
index c9e5e15d5967b1f5afeb97802f73e308c216c841..aa2549adc1ba8b64a6378a02d6d5eb1c05b77c08 100644
--- a/ui/events/platform/x11/x11_event_source.cc
+++ b/ui/events/platform/x11/x11_event_source.cc
@@ -210,9 +210,7 @@ void X11EventSource::ExtractCookieDataDispatchEvent(XEvent* xevent) {
 void X11EventSource::PostDispatchEvent(XEvent* xevent) {
   if (xevent->type == GenericEvent &&
       (xevent->xgeneric.evtype == XI_HierarchyChanged ||
-       (xevent->xgeneric.evtype == XI_DeviceChanged &&
-        static_cast<XIDeviceChangedEvent*>(xevent->xcookie.data)->reason ==
-            XIDeviceChange))) {
+       xevent->xgeneric.evtype == XI_DeviceChanged)) {
     UpdateDeviceList();
     hotplug_event_handler_->OnHotplugEvent();
   }