Add palm suppression feature to EventConverterEvdev

ui/events/ozone/evdev/input_device_factory_evdev.h

Index: ui/events/ozone/evdev/input_device_factory_evdev.h
diff --git a/ui/events/ozone/evdev/input_device_factory_evdev.h b/ui/events/ozone/evdev/input_device_factory_evdev.h
index 1b3279947f7d4a405bc386f6dc34bf78521e5057..826403f1545c23022f331a6f080685e776a7839e 100644
--- a/ui/events/ozone/evdev/input_device_factory_evdev.h
+++ b/ui/events/ozone/evdev/input_device_factory_evdev.h
@@ -26,6 +26,7 @@ namespace ui {
 class CursorDelegateEvdev;
 class DeviceEventDispatcherEvdev;
 class InputDeviceFactoryEvdevProxy;
+class PalmSuppressionFilter;
 
 #if !defined(USE_EVDEV)
 #error Missing dependency on ui/events/ozone:events_ozone_evdev
@@ -133,6 +134,9 @@ class EVENTS_OZONE_EVDEV_EXPORT InputDeviceFactoryEvdev {
   // Device settings. These primarily affect libgestures behavior.
   InputDeviceSettingsEvdev input_device_settings_;
 
+  // Palm suppression filter shared by touch event converter.
+  std::unique_ptr<PalmSuppressionFilter> palm_filter_;
+
   // Support weak pointers for attach & detach callbacks.
   base::WeakPtrFactory<InputDeviceFactoryEvdev> weak_ptr_factory_;