Fix WeakPtrFactory member ordering in ui

ui/aura/window_event_dispatcher.h

Index: ui/aura/window_event_dispatcher.h
diff --git a/ui/aura/window_event_dispatcher.h b/ui/aura/window_event_dispatcher.h
index 8494123c1e30bd33863431a1ff63ea725a3e9650..68c947c505927652df60cd29d103e00674e0337a 100644
--- a/ui/aura/window_event_dispatcher.h
+++ b/ui/aura/window_event_dispatcher.h
@@ -258,12 +258,12 @@ class AURA_EXPORT WindowEventDispatcher : public ui::EventProcessor,
 
   ScopedObserver<aura::Window, aura::WindowObserver> observer_manager_;
 
-  // Used to schedule reposting an event.
-  base::WeakPtrFactory<WindowEventDispatcher> repost_event_factory_;
-
   // Used to schedule DispatchHeldEvents() when |move_hold_count_| goes to 0.
   base::WeakPtrFactory<WindowEventDispatcher> held_event_factory_;
 
+  // Used to schedule reposting an event.
+  base::WeakPtrFactory<WindowEventDispatcher> repost_event_factory_;
+
   DISALLOW_COPY_AND_ASSIGN(WindowEventDispatcher);
 };