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

chrome/browser/browser_process_impl.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/browser_process_impl.h"
 
 #include <algorithm>
 #include <map>
 #include <vector>
 
@@ skipping 45 matching lines @@
 #include "chrome/browser/printing/print_job_manager.h"
 #include "chrome/browser/printing/print_preview_dialog_controller.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/renderer_host/chrome_resource_dispatcher_host_delegate.h"
 #include "chrome/browser/safe_browsing/safe_browsing_service.h"
 #include "chrome/browser/shell_integration.h"
 #include "chrome/browser/status_icons/status_tray.h"
 #include "chrome/browser/ui/apps/chrome_app_window_client.h"
 #include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_finder.h"
+#include "chrome/browser/ui/user_manager.h"
 #include "chrome/browser/web_resource/promo_resource_service.h"
 #include "chrome/common/chrome_constants.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/extensions/chrome_extensions_client.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/switch_utils.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/installer/util/google_update_constants.h"
 #include "chrome/installer/util/google_update_settings.h"
@@ skipping 172 matching lines @@
   // those things during teardown.
   notification_ui_manager_.reset();
 
   // Need to clear profiles (download managers) before the io_thread_.
   {
     TRACE_EVENT0("shutdown",
                  "BrowserProcessImpl::StartTearDown:ProfileManager");
     // The desktop User Manager needs to be closed before the guest profile
     // can be destroyed.
     if (switches::IsNewAvatarMenu())
-      chrome::HideUserManager();
+      UserManager::Hide();
     profile_manager_.reset();
   }
 
 #if !defined(OS_ANDROID)
   // Debugger must be cleaned up before IO thread and NotificationService.
   remote_debugging_server_.reset();
 #endif
 
 #if defined(ENABLE_EXTENSIONS)
   ExtensionRendererState::GetInstance()->Shutdown();
@@ skipping 950 matching lines @@
 }
 
 void BrowserProcessImpl::OnAutoupdateTimer() {
   if (CanAutorestartForUpdate()) {
     DLOG(WARNING) << "Detected update.  Restarting browser.";
     RestartBackgroundInstance();
   }
 }
 
 #endif  // (defined(OS_WIN) || defined(OS_LINUX)) && !defined(OS_CHROMEOS)