ozone: Map TouchEvent::touch_id_ into expected range

ui/events/ozone/evdev/event_factory_evdev.h

Index: ui/events/ozone/evdev/event_factory_evdev.h
diff --git a/ui/events/ozone/evdev/event_factory_evdev.h b/ui/events/ozone/evdev/event_factory_evdev.h
index d5079b38142a943ae992cea4ed6ba927c933e5aa..07d0c6f530befaac6d1afddeeba11d7aabe81ca5 100644
--- a/ui/events/ozone/evdev/event_factory_evdev.h
+++ b/ui/events/ozone/evdev/event_factory_evdev.h
@@ -20,6 +20,7 @@
 #include "ui/events/ozone/evdev/mouse_button_map_evdev.h"
 #include "ui/events/platform/platform_event_source.h"
 #include "ui/gfx/native_widget_types.h"
+#include "ui/gfx/sequential_id_generator.h"
 #include "ui/ozone/public/system_input_injector.h"
 
 namespace gfx {
@@ -128,6 +129,9 @@ class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public DeviceEventObserver,
   // Thread for device I/O.
   EventThreadEvdev thread_;
 
+  // Touch event id generator.
+  SequentialIDGenerator touch_id_generator_;
+
   // Support weak pointers for attach & detach callbacks.
   base::WeakPtrFactory<EventFactoryEvdev> weak_ptr_factory_;