Relocate display_manager from ash to ui

chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc

Index: chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
diff --git a/chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc b/chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
index 6d2bf4cc94df828fa07ad7cc783610c919704ef9..ea4ab324a84bb99cf0c4f136e95064696c648696 100644
--- a/chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
+++ b/chrome/browser/ui/webui/chromeos/keyboard_overlay_ui.cc
@@ -6,7 +6,6 @@
 
 #include <stddef.h>
 
-#include "ash/display/display_manager.h"
 #include "ash/shell.h"
 #include "base/bind.h"
 #include "base/bind_helpers.h"
@@ -33,6 +32,7 @@
 #include "content/public/browser/web_ui_message_handler.h"
 #include "ui/base/ime/chromeos/ime_keyboard.h"
 #include "ui/base/ime/chromeos/input_method_manager.h"
+#include "ui/display/manager/display_manager.h"
 
 using chromeos::input_method::ModifierKey;
 using content::WebUIMessageHandler;
@@ -306,7 +306,7 @@ content::WebUIDataSource* CreateKeyboardOverlayUIHTMLSource(Profile* profile) {
   source->AddBoolean("keyboardOverlayTopRowKeysAreFunctionKeys",
                      TopRowKeysAreFunctionKeys(profile));
   ash::Shell* shell = ash::Shell::GetInstance();
-  ash::DisplayManager* display_manager = shell->display_manager();
+  display::DisplayManager* display_manager = shell->display_manager();
   source->AddBoolean("keyboardOverlayIsDisplayUIScalingEnabled",
                      display_manager->IsDisplayUIScalingEnabled());
   source->AddBoolean(