mash: Disable ash_sysui; begin removal.

chrome/app/mash/BUILD.gn

 # 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.
 
 import("//services/shell/public/service_manifest.gni")
 
 source_set("mash") {
   sources = [
     "mash_runner.cc",
     "mash_runner.h",
   ]
   deps = [
     "//ash/mus:lib",
     "//ash/resources",
-    "//ash/sysui:lib",
     "//ash/touch_hud/mus:lib",
     "//base:i18n",
     "//content/public/common",
     "//mash/app_driver:lib",
     "//mash/quick_launch:lib",
     "//mash/session:lib",
     "//mash/task_viewer:lib",
     "//services/shell",
     "//services/shell/background:lib",
     "//services/shell/public/cpp",
@@ skipping 12 matching lines @@
     deps += [ "//components/font_service:lib" ]
   }
 }
 
 service_manifest("manifest") {
   type = "exe"
   name = "chrome_mash"
   source = "chrome_mash_manifest.json"
   deps = [
     "//ash/mus:manifest",
-    "//ash/sysui:manifest",
     "//ash/touch_hud/mus:manifest",
     "//mash/app_driver:manifest",
     "//mash/quick_launch:manifest",
     "//mash/session:manifest",
     "//mash/task_viewer:manifest",
     "//services/ui:manifest",
   ]
   packaged_services = [
     "app_driver",
     "ash",
-    "ash_sysui",
     "mash_session",
     "quick_launch",
     "task_viewer",
     "touch_hud",
     "ui",
   ]
 
   if (is_linux && !is_android) {
     deps += [ "//components/font_service:manifest" ]
     packaged_services += [ "font_service" ]
   }
 }