Cleanup mojo Wallpaper interfaces for mash.

chrome/browser/ui/ash/chrome_wallpaper_manager.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 CHROME_BROWSER_UI_ASH_CHROME_WALLPAPER_MANAGER_H_
-#define CHROME_BROWSER_UI_ASH_CHROME_WALLPAPER_MANAGER_H_
-
-#include "ash/public/interfaces/wallpaper.mojom.h"
-#include "mojo/public/cpp/bindings/binding_set.h"
-
-// ChromeWallpaperManager exposes chrome wallpaper functionality to mash.
-class ChromeWallpaperManager : public ash::mojom::WallpaperManager {
- public:
-  ChromeWallpaperManager();
-  ~ChromeWallpaperManager() override;
-
-  void ProcessRequest(ash::mojom::WallpaperManagerRequest request);
-
- private:
-  // ash::mojom::WallpaperManager:
-  void Open() override;
-
-  mojo::BindingSet<ash::mojom::WallpaperManager> bindings_;
-
-  DISALLOW_COPY_AND_ASSIGN(ChromeWallpaperManager);
-};
-
-#endif  // CHROME_BROWSER_UI_ASH_CHROME_WALLPAPER_MANAGER_H_