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

chrome/browser/ui/views/profiles/new_avatar_menu_button_browsertest.cc

 // Copyright 2014 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 "base/command_line.h"
 #include "base/path_service.h"
 #include "base/strings/utf_string_conversions.h"
 #include "chrome/browser/chrome_notification_types.h"
 #include "chrome/browser/profiles/profile_manager.h"
 #include "chrome/browser/profiles/profiles_state.h"
-#include "chrome/browser/ui/browser_dialogs.h"
 #include "chrome/browser/ui/browser_list.h"
+#include "chrome/browser/ui/user_manager.h"
 #include "chrome/browser/ui/views/frame/browser_view.h"
 #include "chrome/browser/ui/views/profiles/avatar_menu_button.h"
 #include "chrome/browser/ui/views/profiles/new_avatar_button.h"
 #include "chrome/browser/ui/views/profiles/profile_chooser_view.h"
 #include "chrome/browser/ui/views/profiles/user_manager_view.h"
 #include "chrome/common/chrome_paths.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/test/base/in_process_browser_test.h"
 #include "chrome/test/base/test_switches.h"
 #include "chrome/test/base/testing_browser_process.h"
@@ skipping 102 matching lines @@
       ui::ET_MOUSE_RELEASED, gfx::Point(), gfx::Point(), 0, 0);
   ProfileChooserView::profile_bubble_->ButtonPressed(
       ProfileChooserView::profile_bubble_->lock_button_, mouse_ev);
 
   EXPECT_TRUE(menu->GetItemAt(menu->GetActiveProfileIndex()).signin_required);
 
   window_close_observer.Wait();  // Rely on test timeout for failure indication.
   EXPECT_TRUE(browser_list->empty());
 
   // If the User Manager hasn't shown yet, wait for it to show up.
-  if (!UserManagerView::IsShowing())
+  if (!UserManager::IsShowing())
     base::MessageLoop::current()->RunUntilIdle();
 
   // We need to hide the User Manager or else the process can't die.
-  chrome::HideUserManager();
+  UserManager::Hide();
 }