ash: Remove broken display notification suppression when settings is open

ash/system/chromeos/screen_layout_observer.cc

Index: ash/system/chromeos/screen_layout_observer.cc
diff --git a/ash/system/chromeos/screen_layout_observer.cc b/ash/system/chromeos/screen_layout_observer.cc
index 85f8895b312b0e2915496213990844f261a3399f..38cda20f996b45466f8e8bf1183c418c0b1ac4d4 100644
--- a/ash/system/chromeos/screen_layout_observer.cc
+++ b/ash/system/chromeos/screen_layout_observer.cc
@@ -300,11 +300,8 @@ void ScreenLayoutObserver::OnDisplayConfigurationChanged() {
   DisplayInfoMap old_info;
   UpdateDisplayInfo(&old_info);
 
-  if (!WmShell::Get()
-           ->system_tray_delegate()
-           ->ShouldShowDisplayNotification()) {
+  if (!show_notifications_for_testing)
     return;
-  }
 
   base::string16 message;
   base::string16 additional_message;