Use OnceCallback on Mojo interfaces in //ash

ash/test/test_session_state_animator.h

 // Copyright 2014 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_TEST_TEST_SESSION_STATE_ANIMATOR_H_
 #define ASH_TEST_TEST_SESSION_STATE_ANIMATOR_H_
 
 #include <stddef.h>
 
 #include <map>
@@ skipping 52 matching lines @@
   // Returns the number of active animations.
   size_t GetAnimationCount() const;
 
   // 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;
 
   // Data structure to track the currently active animations and their
   // callbacks.
@@ skipping 69 matching lines @@
   // Tracks whether the wallpaper is hidden or not.
   bool is_wallpaper_hidden_;
 
   DISALLOW_COPY_AND_ASSIGN(TestSessionStateAnimator);
 };
 
 }  // namespace test
 }  // namespace ash
 
 #endif  // ASH_TEST_TEST_SESSION_STATE_ANIMATOR_H_