ozone: evdev: Dispatch events in task

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 c1998a612a52fdd9abc1a5fc6cc700f54e2a563b..12e96925329a74f46288d4ec33ed36d89057d454 100644
--- a/ui/events/ozone/evdev/event_factory_evdev.h
+++ b/ui/events/ozone/evdev/event_factory_evdev.h
@@ -35,12 +35,16 @@ class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public DeviceEventObserver,
                     DeviceManager* device_manager);
   virtual ~EventFactoryEvdev();
 
-  void DispatchUiEvent(Event* event);
-
   void WarpCursorTo(gfx::AcceleratedWidget widget,
                     const gfx::PointF& location);
 
  private:
+  // Post a task to dispatch an event.
+  void PostUiEvent(scoped_ptr<Event> event);
+
+  // Dispatch event via PlatformEventSource.
+  void DispatchUiEventTask(scoped_ptr<Event> event);
+
   // Open device at path & starting processing events (on UI thread).
   void AttachInputDevice(scoped_ptr<EventConverterEvdev> converter);