Access to Chrome via the System Tray should go through the User Manager.

chrome/browser/profiles/avatar_menu.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 "chrome/browser/profiles/avatar_menu.h"
 
 #include "ash/ash_switches.h"
 #include "base/bind.h"
 #include "base/i18n/case_conversion.h"
 #include "base/metrics/field_trial.h"
@@ skipping 117 matching lines @@
   }
 
   base::FilePath path =
       profile_info_->GetPathOfProfileAtIndex(item.profile_index);
 
   chrome::HostDesktopType desktop_type = chrome::GetActiveDesktop();
   if (browser_)
     desktop_type = browser_->host_desktop_type();
 
   profiles::SwitchToProfile(path, desktop_type, always_create,
-                            profiles::ProfileSwitchingDoneCallback(),
+                            ProfileManager::CreateCallback(),
                             metric);
 }
 
 void AvatarMenu::AddNewProfile(ProfileMetrics::ProfileAdd type) {
   menu_actions_->AddNewProfile(type);
 }
 
 void AvatarMenu::EditProfile(size_t index) {
   // Get the index in the profile cache from the menu index.
   size_t profile_index = profile_list_->GetItemAt(index).profile_index;
@@ skipping 75 matching lines @@
 }
 
 void AvatarMenu::Observe(int type,
                          const content::NotificationSource& source,
                          const content::NotificationDetails& details) {
   DCHECK_EQ(chrome::NOTIFICATION_PROFILE_CACHED_INFO_CHANGED, type);
   RebuildMenu();
   if (observer_)
     observer_->OnAvatarMenuChanged(this);
 }