Use OnceCallback on Mojo interfaces in //ash

ash/wm/session_state_animator_impl.h

 // Copyright (c) 2012 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef ASH_WM_SESSION_STATE_ANIMATOR_IMPL_H_
 #define ASH_WM_SESSION_STATE_ANIMATOR_IMPL_H_
 
 #include "ash/ash_export.h"
 #include "ash/wm/session_state_animator.h"
 #include "base/macros.h"
@@ skipping 38 matching lines @@
   static void GetContainers(int container_mask,
                             aura::Window::Windows* containers);
 
   // ash::SessionStateAnimator:
   void StartAnimation(int container_mask,
                       AnimationType type,
                       AnimationSpeed speed) override;
   void StartAnimationWithCallback(int container_mask,
                                   AnimationType type,
                                   AnimationSpeed speed,
-                                  base::Closure callback) override;
-  AnimationSequence* BeginAnimationSequence(base::Closure callback) override;
+                                  base::OnceClosure callback) override;
+  AnimationSequence* BeginAnimationSequence(
+      base::OnceClosure callback) override;
   bool IsWallpaperHidden() const override;
   void ShowWallpaper() override;
   void HideWallpaper() override;
 
  private:
   class AnimationSequence;
   friend class AnimationSequence;
 
   virtual void StartAnimationInSequence(int container_mask,
                                         AnimationType type,
                                         AnimationSpeed speed,
                                         AnimationSequence* observer);
 
   // Apply animation |type| to window |window| with |speed| and add |observer|
   // if it is not NULL to the last animation sequence.
   void RunAnimationForWindow(aura::Window* window,
                              SessionStateAnimator::AnimationType type,
                              SessionStateAnimator::AnimationSpeed speed,
                              ui::LayerAnimationObserver* observer);
 
   DISALLOW_COPY_AND_ASSIGN(SessionStateAnimatorImpl);
 };
 
 }  // namespace ash
 
 #endif  // ASH_WM_SESSION_STATE_ANIMATOR_IMPL_H_