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

ash/desktop_background/user_wallpaper_delegate.h

-// Copyright 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_DESKTOP_BACKGROUND_USER_WALLPAPER_DELEGATE_H_
-#define ASH_DESKTOP_BACKGROUND_USER_WALLPAPER_DELEGATE_H_
-
-#include "ash/ash_export.h"
-
-namespace ash {
-
-class ASH_EXPORT UserWallpaperDelegate {
- public:
-  virtual ~UserWallpaperDelegate() {}
-
-  // Returns the type of window animation that should be used when showing the
-  // wallpaper.
-  virtual int GetAnimationType() = 0;
-
-  // Returns the wallpaper animation duration in ms. A value of 0 indicates
-  // that the default should be used.
-  virtual int GetAnimationDurationOverride() = 0;
-
-  // Sets wallpaper animation duration in ms. Pass 0 to use the default.
-  virtual void SetAnimationDurationOverride(int animation_duration_in_ms) = 0;
-
-  // Should the slower initial animation be shown (as opposed to the faster
-  // animation that's used e.g. when switching from one user's wallpaper to
-  // another's on the login screen)?
-  virtual bool ShouldShowInitialAnimation() = 0;
-
-  // Updates current wallpaper. It may switch the size of wallpaper based on the
-  // current display's resolution. If |clear_cache| is true, all wallpaper
-  // cache should be cleared. This is required when the display's native
-  // resolution changes to a larger resolution (e.g. when hooked up a large
-  // external display) and we need to load a larger resolution wallpaper for the
-  // large display. All the previous small resolution wallpaper cache should be
-  // cleared.
-  virtual void UpdateWallpaper(bool clear_cache) = 0;
-
-  // Initialize wallpaper.
-  virtual void InitializeWallpaper() = 0;
-
-  // Opens the set wallpaper page in the browser.
-  virtual void OpenSetWallpaperPage() = 0;
-
-  // Returns true if user can open set wallpaper page.
-  virtual bool CanOpenSetWallpaperPage() = 0;
-
-  // Notifies delegate that wallpaper animation has finished.
-  virtual void OnWallpaperAnimationFinished() = 0;
-
-  // Notifies delegate that wallpaper boot animation has finished.
-  virtual void OnWallpaperBootAnimationFinished() = 0;
-};
-
-}  // namespace ash
-
-#endif  // ASH_DESKTOP_BACKGROUND_USER_WALLPAPER_DELEGATE_H_