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

chrome/browser/app_controller_mac.mm

 // 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.
 
 #import "chrome/browser/app_controller_mac.h"
 
 #include "apps/app_shim/extension_app_shim_handler_mac.h"
 #include "base/auto_reset.h"
 #include "base/bind.h"
 #include "base/command_line.h"
@@ skipping 51 matching lines @@
 #import "chrome/browser/ui/cocoa/history_menu_bridge.h"
 #include "chrome/browser/ui/cocoa/last_active_browser_cocoa.h"
 #import "chrome/browser/ui/cocoa/profiles/profile_menu_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_strip_controller.h"
 #import "chrome/browser/ui/cocoa/tabs/tab_window_controller.h"
 #include "chrome/browser/ui/cocoa/task_manager_mac.h"
 #include "chrome/browser/ui/extensions/application_launch.h"
 #include "chrome/browser/ui/host_desktop.h"
 #include "chrome/browser/ui/startup/startup_browser_creator.h"
 #include "chrome/browser/ui/startup/startup_browser_creator_impl.h"
+#include "chrome/browser/ui/user_manager.h"
 #include "chrome/common/chrome_paths_internal.h"
 #include "chrome/common/chrome_switches.h"
 #include "chrome/common/cloud_print/cloud_print_class_mac.h"
 #include "chrome/common/extensions/extension_constants.h"
 #include "chrome/common/mac/app_mode_common.h"
 #include "chrome/common/pref_names.h"
 #include "chrome/common/url_constants.h"
 #include "chrome/grit/chromium_strings.h"
 #include "chrome/grit/generated_resources.h"
 #include "components/signin/core/browser/signin_manager.h"
@@ skipping 957 matching lines @@
   if (SessionRestore::IsRestoring(lastProfile) &&
       base::MessageLoop::current()->IsNested())
     return;
 
   NSInteger tag = [sender tag];
 
   // If there are no browser windows, and we are trying to open a browser
   // for a locked profile, we have to show the User Manager instead as the
   // locked profile needs authentication.
   if (IsProfileSignedOut(lastProfile)) {
-    chrome::ShowUserManager(lastProfile->GetPath());
+    UserManager::Show(lastProfile->GetPath(),
+                      profiles::USER_MANAGER_NO_TUTORIAL,
+                      profiles::USER_MANAGER_SELECT_PROFILE_NO_ACTION);
     return;
   }
 
   switch (tag) {
     case IDC_NEW_TAB:
       // Create a new tab in an existing browser window (which we activate) if
       // possible.
       if (Browser* browser = ActivateBrowser(lastProfile)) {
         chrome::ExecuteCommand(browser, IDC_NEW_TAB);
         break;
@@ skipping 180 matching lines @@
         return NO;
     }
   }
 
   // Otherwise open a new window.
   // If the last profile was locked, we have to open the User Manager, as the
   // profile requires authentication. Similarly, because guest mode is
   // implemented as forced incognito, we can't open a new guest browser either,
   // so we have to show the User Manager as well.
   Profile* lastProfile = [self lastProfile];
-  if (lastProfile->IsGuestSession() || IsProfileSignedOut(lastProfile))
-    chrome::ShowUserManager(lastProfile->GetPath());
-  else
+  if (lastProfile->IsGuestSession() || IsProfileSignedOut(lastProfile)) {
+    UserManager::Show(lastProfile->GetPath(),
+                  profiles::USER_MANAGER_NO_TUTORIAL,

[Alexei Svitkine (slow), 2014/09/18 20:54:04]

Nit: Align.

+                  profiles::USER_MANAGER_SELECT_PROFILE_NO_ACTION);
+  } else {
     CreateBrowser(lastProfile);
+  }
 
   // We've handled the reopen event, so return NO to tell AppKit not
   // to do anything.
   return NO;
 }
 
 - (void)initMenuState {
   menuState_.reset(new CommandUpdater(NULL));
   menuState_->UpdateCommandEnabled(IDC_NEW_TAB, true);
   menuState_->UpdateCommandEnabled(IDC_NEW_WINDOW, true);
@@ skipping 316 matching lines @@
 
 //---------------------------------------------------------------------------
 
 namespace app_controller_mac {
 
 bool IsOpeningNewWindow() {
   return g_is_opening_new_window;
 }
 
 }  // namespace app_controller_mac