ozone: evdev: Minor refactor of device open

ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h

Index: ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h
diff --git a/ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h b/ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h
index 6bb87f36f1ee53c32cedc0ebc3f16691ade504a5..f097fb43673f03c575464a396bf2278c88d6a98e 100644
--- a/ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h
+++ b/ui/events/ozone/evdev/libgestures_glue/gesture_interpreter_libevdev_cros.h
@@ -11,18 +11,16 @@
 #include "base/callback.h"
 #include "base/memory/scoped_ptr.h"
 #include "ui/events/ozone/evdev/cursor_delegate_evdev.h"
+#include "ui/events/ozone/evdev/event_dispatch_callback.h"
 #include "ui/events/ozone/evdev/events_ozone_evdev_export.h"
 #include "ui/events/ozone/evdev/libgestures_glue/event_reader_libevdev_cros.h"
 
 namespace ui {
 
-class Event;
 class EventDeviceInfo;
 class EventModifiersEvdev;
 class CursorDelegateEvdev;
 
-typedef base::Callback<void(Event*)> EventDispatchCallback;
-
 // Convert libevdev-cros events to ui::Events using libgestures.
 //
 // This builds a GestureInterpreter for an input device (touchpad or