chromeos: Don't explicitly set system tray visibility during initialization

chrome/browser/ui/ash/system_tray_delegate_chromeos.cc

 // Copyright 2013 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 "chrome/browser/ui/ash/system_tray_delegate_chromeos.h"
 
 #include <stddef.h>
 
 #include <algorithm>
 #include <set>
@@ skipping 295 matching lines @@
   policy::BrowserPolicyConnectorChromeOS* connector =
       g_browser_process->platform_part()->browser_policy_connector_chromeos();
   policy::DeviceCloudPolicyManagerChromeOS* policy_manager =
       connector->GetDeviceCloudPolicyManager();
   if (policy_manager)
     policy_manager->core()->store()->RemoveObserver(this);
 
   user_manager::UserManager::Get()->RemoveSessionStateObserver(this);
 }
 
-// Overridden from ash::SystemTrayDelegate:
-bool SystemTrayDelegateChromeOS::GetTrayVisibilityOnStartup() {
-  // In case of OOBE / sign in screen tray will be shown later.
-  return LoginState::Get()->IsUserLoggedIn();
-}
-
 ash::LoginStatus SystemTrayDelegateChromeOS::GetUserLoginStatus() const {
   if (!LoginState::Get()->IsUserLoggedIn())
     return ash::LoginStatus::NOT_LOGGED_IN;
 
   if (screen_locked_)
     return ash::LoginStatus::LOCKED;
 
   LoginState::LoggedInUserType user_type =
       LoginState::Get()->GetLoggedInUserType();
   switch (user_type) {
@@ skipping 885 matching lines @@
   LOG(WARNING) << "SystemTrayDelegateChromeOS::GetChildUserMessage call while "
                << "ENABLE_SUPERVISED_USERS undefined.";
   return base::string16();
 }
 
 ash::SystemTrayDelegate* CreateSystemTrayDelegate() {
   return new SystemTrayDelegateChromeOS();
 }
 
 }  // namespace chromeos