Use OnceCallback on Mojo interfaces in //ash

ash/wm/lock_state_controller.h

Index: ash/wm/lock_state_controller.h
diff --git a/ash/wm/lock_state_controller.h b/ash/wm/lock_state_controller.h
index aa4530c33224c1ad6947118e6eb3d78d66d8080b..214c075ef835243414ce397e52bdaa08b934ac32 100644
--- a/ash/wm/lock_state_controller.h
+++ b/ash/wm/lock_state_controller.h
@@ -112,7 +112,7 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
   // Called when ScreenLocker is ready to close, but not yet destroyed.
   // Can be used to display "hiding" animations on unlock.
   // |callback| will be called when all animations are done.
-  void OnLockScreenHide(base::Closure callback);
+  void OnLockScreenHide(base::OnceClosure callback);
 
   // Sets up the callback that should be called once lock animation is finished.
   // Callback is guaranteed to be called once and then discarded.
@@ -173,7 +173,7 @@ class ASH_EXPORT LockStateController : public aura::WindowTreeHostObserver,
   void CancelPreLockAnimation();
   void StartPostLockAnimation();
   // This method calls |callback| when animation completes.
-  void StartUnlockAnimationBeforeUIDestroyed(base::Closure& callback);
+  void StartUnlockAnimationBeforeUIDestroyed(base::OnceClosure callback);
   void StartUnlockAnimationAfterUIDestroyed();
 
   // These methods are called when corresponding animation completes.