cros: Remove supervised user methods from SystemTrayDelegate

chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc

Index: chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
diff --git a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
index 2e1474dc43da2b62f1ffb2e0fd5ba39bcdf795d9..e9c4df78a117a0e80be0a498b20b72b925a52bb8 100644
--- a/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
+++ b/chrome/browser/ui/views/ash/chrome_browser_main_extra_parts_ash.cc
@@ -75,6 +75,7 @@ void ChromeBrowserMainExtraPartsAsh::PreProfileInit() {
   }
 
   session_controller_client_ = base::MakeUnique<SessionControllerClient>();
+  session_controller_client_->Init();
 
   // Must be available at login screen, so initialize before profile.
   system_tray_client_ = base::MakeUnique<SystemTrayClient>();