Move ash::DisplayManager switches to ui::display

ash/system/overview/overview_button_tray_unittest.cc

Index: ash/system/overview/overview_button_tray_unittest.cc
diff --git a/ash/system/overview/overview_button_tray_unittest.cc b/ash/system/overview/overview_button_tray_unittest.cc
index 262adf73056cae1a239e91186fafea163d163224..7cd0b1138f6fabe1332617f7c19096835e98c562 100644
--- a/ash/system/overview/overview_button_tray_unittest.cc
+++ b/ash/system/overview/overview_button_tray_unittest.cc
@@ -4,7 +4,6 @@
 
 #include "ash/common/system/overview/overview_button_tray.h"
 
-#include "ash/common/ash_switches.h"
 #include "ash/common/login_status.h"
 #include "ash/common/shelf/shelf_types.h"
 #include "ash/common/system/status_area_widget.h"
@@ -25,6 +24,7 @@
 #include "ui/aura/client/aura_constants.h"
 #include "ui/aura/window.h"
 #include "ui/compositor/scoped_animation_duration_scale_mode.h"
+#include "ui/display/display_switches.h"
 #include "ui/events/event.h"
 #include "ui/events/event_constants.h"
 #include "ui/events/gestures/gesture_types.h"
@@ -69,7 +69,7 @@ class OverviewButtonTrayTest : public test::AshTestBase {
 
 void OverviewButtonTrayTest::SetUp() {
   base::CommandLine::ForCurrentProcess()->AppendSwitch(
-      switches::kAshUseFirstDisplayAsInternal);
+      ::switches::kUseFirstDisplayAsInternal);
   AshTestBase::SetUp();
 }