Remove the system menu display settings row

ash/shell.cc

Index: ash/shell.cc
diff --git a/ash/shell.cc b/ash/shell.cc
index e117dbda8d15cbe97fb5dbe216f70130e956c5a1..9e9bf1b62056a55e7969162ba9cde60c8942433f 100644
--- a/ash/shell.cc
+++ b/ash/shell.cc
@@ -57,6 +57,7 @@
 #include "ash/shelf/shelf.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell_init_params.h"
+#include "ash/system/chromeos/screen_layout_observer.h"
 #include "ash/utility/screenshot_controller.h"
 #include "ash/wm/ash_focus_rules.h"
 #include "ash/wm/ash_native_cursor_manager.h"
@@ -588,6 +589,7 @@ Shell::~Shell() {
 
 #if defined(OS_CHROMEOS)
   screen_orientation_controller_.reset();
+  screen_layout_observer_.reset();
 #endif
 
 // Destroy the virtual keyboard controller before the maximize mode controller
@@ -981,6 +983,7 @@ void Shell::Init(const ShellInitParams& init_params) {
       new VideoActivityNotifier(video_detector_.get()));
   bluetooth_notification_controller_.reset(new BluetoothNotificationController);
   screen_orientation_controller_.reset(new ScreenOrientationController());
+  screen_layout_observer_.reset(new ScreenLayoutObserver());
 #endif
   // The compositor thread and main message loop have to be running in
   // order to create mirror window. Run it after the main message loop