Remove the system menu display settings row

ash/system/chromeos/tray_display.h

-// Copyright (c) 2012 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.
-
-#ifndef ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_
-#define ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_
-
-#include <stdint.h>
-
-#include <map>
-
-#include "ash/ash_export.h"
-#include "ash/common/system/tray/system_tray_item.h"
-#include "ash/common/wm_display_observer.h"
-#include "base/macros.h"
-#include "base/strings/string16.h"
-#include "ui/display/manager/managed_display_info.h"
-#include "ui/views/view.h"
-
-namespace ash {
-
-class DisplayView;
-
-class ASH_EXPORT TrayDisplay : public SystemTrayItem, public WmDisplayObserver {
- public:
-  explicit TrayDisplay(SystemTray* system_tray);
-  ~TrayDisplay() override;
-
-  // Overridden from WmDisplayObserver:
-  void OnDisplayConfigurationChanged() override;
-
- private:
-  friend class TrayDisplayTest;
-
-  using DisplayInfoMap = std::map<int64_t, display::ManagedDisplayInfo>;
-
-  static const char kNotificationId[];
-
-  // Scans the current display info and updates |display_info_|. Sets the
-  // previous data to |old_info| if it's not NULL.
-  void UpdateDisplayInfo(DisplayInfoMap* old_info);
-
-  // Compares the current display settings with |old_info| and determine what
-  // message should be shown for notification. Returns true if there's a
-  // meaningful change. Note that it's possible to return true and set
-  // |message_out| to empty, which means the notification should be removed. It
-  // also sets |additional_message_out| which appears in the notification with
-  // the |message_out|.
-  bool GetDisplayMessageForNotification(const DisplayInfoMap& old_info,
-                                        base::string16* message_out,
-                                        base::string16* additional_message_out);
-
-  // Creates or updates the display notification.
-  void CreateOrUpdateNotification(const base::string16& message,
-                                  const base::string16& additional_message);
-
-  // Overridden from SystemTrayItem.
-  views::View* CreateDefaultView(LoginStatus status) override;
-  void DestroyDefaultView() override;
-
-  // Test accessors.
-  base::string16 GetDefaultViewMessage() const;
-  bool GetAccessibleStateForTesting(ui::AXViewState* state);
-  const views::View* default_view() const {
-    return reinterpret_cast<views::View*>(default_);
-  }
-
-  DisplayView* default_;
-  DisplayInfoMap display_info_;
-
-  DISALLOW_COPY_AND_ASSIGN(TrayDisplay);
-};
-
-}  // namespace ash
-
-#endif  // ASH_SYSTEM_CHROMEOS_TRAY_DISPLAY_H_