cros: Disable system tray help/lock buttons during supervised user creation

ash/system/date/tray_system_info.cc

 // Copyright 2016 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ash/system/date/tray_system_info.h"
 
 #include "ash/shelf/wm_shelf_util.h"
 #include "ash/shell.h"
 #include "ash/system/date/date_view.h"
 #include "ash/system/date/system_info_default_view.h"
@@ skipping 35 matching lines @@
       IsHorizontalAlignment(system_tray()->shelf_alignment())
           ? tray::TimeView::ClockLayout::HORIZONTAL_CLOCK
           : tray::TimeView::ClockLayout::VERTICAL_CLOCK;
   tray_view_ = new tray::TimeView(clock_layout);
   views::View* view = new TrayItemView(this);
   view->AddChildView(tray_view_);
   return view;
 }
 
 views::View* TraySystemInfo::CreateDefaultView(LoginStatus status) {
-  default_view_ = new SystemInfoDefaultView(this, status);
+  default_view_ = new SystemInfoDefaultView(this);
 
   // Save the login status we created the view with.
   login_status_ = status;
 
   OnSystemClockCanSetTimeChanged(system_clock_observer_->can_set_time());
   return default_view_;
 }
 
 void TraySystemInfo::DestroyTrayView() {
   tray_view_ = nullptr;
@@ skipping 37 matching lines @@
 }
 
 void TraySystemInfo::UpdateTimeFormat() {
   if (tray_view_)
     tray_view_->UpdateTimeFormat();
   if (default_view_)
     default_view_->GetDateView()->UpdateTimeFormat();
 }
 
 }  // namespace ash