Overview Tray Button should not be visible on login screen

ash/system/status_area_widget.cc

 // Copyright (c) 2012 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/status_area_widget.h"
 
 #include "ash/root_window_controller.h"
 #include "ash/shelf/shelf_layout_manager.h"
 #include "ash/shelf/shelf_widget.h"
 #include "ash/shell.h"
@@ skipping 169 matching lines @@
     return;
   login_status_ = login_status;
   if (system_tray_)
     system_tray_->UpdateAfterLoginStatusChange(login_status);
   if (web_notification_tray_)
     web_notification_tray_->UpdateAfterLoginStatusChange(login_status);
 #if defined(OS_CHROMEOS)
   if (logout_button_tray_)
     logout_button_tray_->UpdateAfterLoginStatusChange(login_status);
 #endif
+  if (overview_button_tray_)
+    overview_button_tray_->UpdateAfterLoginStatusChange(login_status);

[sadrul, 2014/03/28 21:23:35]

Should UpdateAfterLoginStatusChange() be added to TrayBackgroundView interface?
That would ensure new implementations of tray-icons provide a proper
implementation for this case. (if you do this, you should do that in a
subsequent CL. This looks good for this CL)

[jonross, 2014/03/31 15:09:01]

Yeah, each of these trays implements it. It should definitely be moved up into
TrayBackgroundView. I'll do that on a subsequent CL.

 }
 
 }  // namespace internal
 }  // namespace ash