mash: Disable ash_sysui; begin removal.

chrome/browser/ui/ash/chrome_wallpaper_manager.cc

 // 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.
 
 #include "chrome/browser/ui/ash/chrome_wallpaper_manager.h"
 
 #include "chrome/browser/chromeos/extensions/wallpaper_manager_util.h"
 
 ChromeWallpaperManager::ChromeWallpaperManager() {}
 
 ChromeWallpaperManager::~ChromeWallpaperManager() {}
 
 void ChromeWallpaperManager::ProcessRequest(
-    ash::sysui::mojom::WallpaperManagerRequest request) {
+    ash::mojom::WallpaperManagerRequest request) {
   bindings_.AddBinding(this, std::move(request));
 }
 
 void ChromeWallpaperManager::Open() {
   wallpaper_manager_util::OpenWallpaperManager();
 }