Mac - show user manager before opening browser.

chrome/browser/ui/cocoa/profiles/user_manager_mac.mm

 // 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 "chrome/browser/ui/cocoa/profiles/user_manager_mac.h"
 
 #include "base/mac/foundation_util.h"
 #include "chrome/app/chrome_command_ids.h"
 #import "chrome/browser/app_controller_mac.h"
 #include "chrome/browser/browser_process.h"
@@ skipping 148 matching lines @@
   userManagerObserver_->WindowWasClosed();
 }
 
 @end
 
 
 void UserManager::Show(
     const base::FilePath& profile_path_to_focus,
     profiles::UserManagerTutorialMode tutorial_mode,
     profiles::UserManagerProfileSelected profile_open_action) {
+  DCHECK(profile_path_to_focus != ProfileManager::GetGuestProfilePath());
+
   ProfileMetrics::LogProfileSwitchUser(ProfileMetrics::OPEN_USER_MANAGER);
   if (instance_) {
     // If there's a user manager window open already, just activate it.
     [instance_->window_controller() show];
     return;
   }
 
   // Create the guest profile, if necessary, and open the User Manager
   // from the guest profile.
   profiles::CreateGuestProfileForUserManager(
@@ skipping 25 matching lines @@
                                            const std::string& url) {
   DCHECK(!instance_);
   instance_ = new UserManagerMac(guest_profile);
   [instance_->window_controller() showURL:GURL(url)];
 }
 
 void UserManagerMac::WindowWasClosed() {
   instance_ = NULL;
   delete this;
 }