Remove the system menu display settings row

ash/common/system/tray/system_tray.cc

 // 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.
 
 #include "ash/common/system/tray/system_tray.h"
 
 #include "ash/common/ash_switches.h"
 #include "ash/common/login_status.h"
 #include "ash/common/session/session_state_delegate.h"
 #include "ash/common/shelf/wm_shelf.h"
@@ skipping 177 matching lines @@
   AddTrayItem(new TrayIME(this));
   AddTrayItem(tray_accessibility_);
   AddTrayItem(new TrayTracing(this));
   AddTrayItem(new TrayPower(this, message_center::MessageCenter::Get()));
   AddTrayItem(new TrayNetwork(this));
   AddTrayItem(new TrayVPN(this));
   AddTrayItem(new TraySms(this));
   AddTrayItem(new TrayBluetooth(this));
   tray_cast_ = new TrayCast(this);
   AddTrayItem(tray_cast_);
   // TODO(jamescook): Remove this when mus has support for display management

[James Cook, 2016/08/05 17:00:24]

Delete this comment.

[yiyix, 2016/08/13 05:28:50]

Done.

   // and we have a DisplayManager equivalent. See http://crbug.com/548429
-  std::unique_ptr<SystemTrayItem> tray_display =
-      delegate->CreateDisplayTrayItem(this);
-  if (tray_display)
-    AddTrayItem(tray_display.release());
   screen_capture_tray_item_ = new ScreenCaptureTrayItem(this);
   AddTrayItem(screen_capture_tray_item_);
   screen_share_tray_item_ = new ScreenShareTrayItem(this);
   AddTrayItem(screen_share_tray_item_);
   AddTrayItem(new MultiProfileMediaTrayItem(this));
   AddTrayItem(new TrayAudioChromeOs(this));
   AddTrayItem(new TrayBrightness(this));
   AddTrayItem(new TrayCapsLock(this));
   // TODO(jamescook): Remove this when mus has support for display management
   // and we have a DisplayManager equivalent. See http://crbug.com/548429
@@ skipping 555 matching lines @@
           .work_area()
           .height();
   if (work_area_height > 0) {
     UMA_HISTOGRAM_CUSTOM_COUNTS(
         "Ash.SystemMenu.PercentageOfWorkAreaHeightCoveredByMenu",
         100 * bubble_view->height() / work_area_height, 1, 300, 100);
   }
 }
 
 }  // namespace ash