mash: Port mojo:ash_sysui's ContextMenuMus to mojo:ash.

ash/sysui/user_wallpaper_delegate_mus.h

-// Copyright 2016 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_SYSUI_USER_WALLPAPER_DELEGATE_MUS_H_
-#define ASH_SYSUI_USER_WALLPAPER_DELEGATE_MUS_H_
-
-#include "ash/desktop_background/user_wallpaper_delegate.h"
-#include "ash/public/interfaces/wallpaper.mojom.h"
-#include "base/macros.h"
-
-namespace ash {
-namespace sysui {
-
-class UserWallpaperDelegateMus : public UserWallpaperDelegate,
-                                 public mojom::WallpaperController {
- public:
-  UserWallpaperDelegateMus();
-  ~UserWallpaperDelegateMus() override;
-
- private:
-  // UserWallpaperDelegate overrides:
-  int GetAnimationType() override;
-  int GetAnimationDurationOverride() override;
-  void SetAnimationDurationOverride(int animation_duration_in_ms) override;
-  bool ShouldShowInitialAnimation() override;
-  void UpdateWallpaper(bool clear_cache) override;
-  void InitializeWallpaper() override;
-  void OpenSetWallpaperPage() override;
-  bool CanOpenSetWallpaperPage() override;
-  void OnWallpaperAnimationFinished() override;
-  void OnWallpaperBootAnimationFinished() override;
-
-  // mojom::WallpaperController overrides:
-  void SetWallpaper(const SkBitmap& wallpaper,
-                    mojom::WallpaperLayout layout) override;
-
-  DISALLOW_COPY_AND_ASSIGN(UserWallpaperDelegateMus);
-};
-
-}  // namespace sysui
-}  // namespace ash
-
-#endif  // ASH_SYSUI_USER_WALLPAPER_DELEGATE_MUS_H_