Relocate display_manager from ash to ui

ui/display/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/ui.gni")
 import("//testing/test.gni")
 
 component("display") {
   sources = [
     "android/screen_android.cc",
@@ skipping 30 matching lines @@
     "fake_display_snapshot.cc",
     "fake_display_snapshot.h",
     "ios/screen_ios.mm",
     "mac/screen_mac.mm",
     "manager/display_layout.cc",
     "manager/display_layout.h",
     "manager/display_layout_builder.cc",
     "manager/display_layout_builder.h",
     "manager/display_layout_store.cc",
     "manager/display_layout_store.h",
+    "manager/display_manager.cc",
+    "manager/display_manager.h",
     "manager/display_manager_utilities.cc",
     "manager/display_manager_utilities.h",
     "manager/managed_display_info.cc",
     "manager/managed_display_info.h",
     "screen.cc",
     "screen.h",
     "screen_aura.cc",
     "screen_base.cc",
     "screen_base.h",
     "win/display_info.cc",
@@ skipping 58 matching lines @@
     sources -= [ "android/screen_android.cc" ]
   }
   if (is_mac) {
     libs = [
       "AppKit.framework",
       "CoreGraphics.framework",
     ]
   }
 }
 
+component("display_manager_test_api") {
+  testonly = true
+  sources = [
+    "test/display_manager_test_api.cc",
+    "test/display_manager_test_api.h",
+  ]
+
+  defines = [ "DISPLAY_IMPLEMENTATION" ]
+
+  public_deps = [
+    ":display",
+  ]
+
+  deps = [
+    "//base",
+    "//ui/display",
+    "//ui/display/types",
+  ]
+}
+
 static_library("test_support") {
   testonly = true
   sources = [
     "chromeos/test/action_logger.cc",
     "chromeos/test/action_logger.h",
     "chromeos/test/action_logger_util.cc",
     "chromeos/test/action_logger_util.h",
     "chromeos/test/test_display_layout_manager.cc",
     "chromeos/test/test_display_layout_manager.h",
     "chromeos/test/test_native_display_delegate.cc",
@@ skipping 69 matching lines @@
     sources -= [ "display_change_notifier_unittest.cc" ]
   }
 
   if (is_chromeos && use_ozone) {
     sources -= [
       "chromeos/x11/display_util_x11_unittest.cc",
       "chromeos/x11/native_display_event_dispatcher_x11_unittest.cc",
     ]
   }
 }