ozone: Remove the explicit call to start listening for events.

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 f4ded50d1f6aa584cfdd2af4a2638a98be3fcf98..da56524c26f2bf7f28aa773df007840f19cfe0c7 100644
--- a/ui/events/ozone/evdev/event_factory_evdev.h
+++ b/ui/events/ozone/evdev/event_factory_evdev.h
@@ -34,7 +34,6 @@ class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public EventFactoryOzone,
   void DispatchUiEvent(Event* event);
 
   // EventFactoryOzone:
-  virtual void StartProcessingEvents() OVERRIDE;
   virtual void WarpCursorTo(gfx::AcceleratedWidget widget,
                             const gfx::PointF& location) OVERRIDE;
 
@@ -60,14 +59,6 @@ class EVENTS_OZONE_EVDEV_EXPORT EventFactoryEvdev : public EventFactoryOzone,
   // Interface for scanning & monitoring input devices.
   DeviceManager* device_manager_;  // Not owned.
 
-  // True if this was registered with |device_manager_|. This is needed since
-  // StartProcessingEvents() is called multiple times (when a
-  // WindowTreeHostOzone is created) but we shouldn't register this multiple
-  // times.
-  // TODO(dnicoara) Remove once event processing is refactored and we no longer
-  // rely on WTH for starting event processing.
-  bool has_started_processing_events_;
-
   // Task runner for event dispatch.
   scoped_refptr<base::TaskRunner> ui_task_runner_;