Extract touchscreen device management into a generic manager

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 25e74098fac3825bc0e886e6b6967875ca0b55e8..628610661e774baa899f96e5cd1577f4341950fa 100644
--- a/ui/events/platform/x11/x11_event_source.cc
+++ b/ui/events/platform/x11/x11_event_source.cc
@@ -10,6 +10,7 @@
 #include <X11/XKBlib.h>
 
 #include "base/logging.h"
+#include "ui/events/device_data_manager.h"
 #include "ui/events/event_utils.h"
 #include "ui/events/platform/platform_event_dispatcher.h"
 #include "ui/gfx/x/x11_types.h"
@@ -83,6 +84,7 @@ X11EventSource::X11EventSource(XDisplay* display)
     : display_(display),
       continue_stream_(true) {
   CHECK(display_);
+  DeviceDataManager::Initialize();
   InitializeXInput2(display_);
   InitializeXkb(display_);
 }