Split //ui/display and create //ui/display/manager.

ash/BUILD.gn

 # Copyright 2014 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("//build/config/features.gni")
 import("//build/config/ui.gni")
 import("//testing/test.gni")
 import("//ui/base/ui_features.gni")
 
 assert(use_aura)
@@ skipping 867 matching lines @@
     "//skia",
     "//third_party/icu",
     "//ui/accessibility",
     "//ui/app_list/presenter",
     "//ui/aura",
     "//ui/base",
     "//ui/base:ui_data_pack",
     "//ui/base/ime",
     "//ui/compositor",
     "//ui/display",
+    "//ui/display/manager",
     "//ui/display/types",
     "//ui/events",
     "//ui/events:events_base",
     "//ui/events:gesture_detection",
     "//ui/events/devices",
     "//ui/gfx",
     "//ui/gfx/geometry",
     "//ui/keyboard",
     "//ui/message_center",
     "//ui/native_theme",
@@ skipping 605 matching lines @@
   if (is_win) {
     configs -= [ "//build/config/win:console" ]
     configs += [ "//build/config/win:windowed" ]
     deps += [ "//sandbox" ]
   }
 
   if (is_chromeos) {
     deps += [ "//device/bluetooth" ]
   }
 }