Remove the system menu display settings row

ash/shell.h

Index: ash/shell.h
diff --git a/ash/shell.h b/ash/shell.h
index d86fd28b1927842502e6308b0062a3b6b482da30..5172e2f2647ae2dccc9bf390417b764cc3942ff4 100644
--- a/ash/shell.h
+++ b/ash/shell.h
@@ -128,6 +128,7 @@ class SystemTray;
 class ToplevelWindowEventHandler;
 class TouchTransformerController;
 class TouchObserverHUD;
+class ScreenLayoutObserver;
 class UserWallpaperDelegate;
 class VirtualKeyboardController;
 class VideoActivityNotifier;
@@ -412,6 +413,10 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
     return display_error_observer_.get();
   }
 
+  ScreenLayoutObserver* screen_layout_observer() {
+    return screen_layout_observer_.get();
+  }
+
   ResolutionNotificationController* resolution_notification_controller() {
     return resolution_notification_controller_.get();
   }
@@ -593,6 +598,7 @@ class ASH_EXPORT Shell : public SystemModalContainerEventFilterDelegate,
 
   // Implements content::ScreenOrientationController for ChromeOS
   std::unique_ptr<ScreenOrientationController> screen_orientation_controller_;
+  std::unique_ptr<ScreenLayoutObserver> screen_layout_observer_;
 
   std::unique_ptr<TouchTransformerController> touch_transformer_controller_;