[Chrome OS MD] Draw a 1px separator between 2 tray items

ash/common/system/chromeos/session/logout_button_tray.cc

Index: ash/common/system/chromeos/session/logout_button_tray.cc
diff --git a/ash/common/system/chromeos/session/logout_button_tray.cc b/ash/common/system/chromeos/session/logout_button_tray.cc
index ca18e32095f42947eb924ba59d348144e19d6869..f8788020c0fa8936304a53f456703e427628a53c 100644
--- a/ash/common/system/chromeos/session/logout_button_tray.cc
+++ b/ash/common/system/chromeos/session/logout_button_tray.cc
@@ -100,7 +100,6 @@ LogoutButtonTray::LogoutButtonTray(WmShelf* wm_shelf)
       show_logout_button_in_tray_(false) {
   button_ = new LogoutButton(this);
   tray_container()->AddChildView(button_);
-  tray_container()->SetBorder(views::Border::NullBorder());
   WmShell::Get()->system_tray_notifier()->AddLogoutButtonObserver(this);
 }
 
@@ -110,7 +109,6 @@ LogoutButtonTray::~LogoutButtonTray() {
 
 void LogoutButtonTray::SetShelfAlignment(ShelfAlignment alignment) {
   TrayBackgroundView::SetShelfAlignment(alignment);
-  tray_container()->SetBorder(views::Border::NullBorder());
 }
 
 base::string16 LogoutButtonTray::GetAccessibleNameForTray() {