CHECK for LoginDisplayHost instance in ActivateWizard

chrome/browser/chromeos/login/session/user_session_manager.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 "chrome/browser/chromeos/login/session/user_session_manager.h"
 
 #include <string>
 
 #include "base/base_paths.h"
 #include "base/bind.h"
@@ skipping 962 matching lines @@
   // UserSessionManager::PrepareProfile() has set |delegate_| when Chrome is
   // killed during shutdown in tests -- see http://crosbug.com/18269.  Replace
   // this 'if' statement with a CHECK(delegate_) once the underlying issue is
   // resolved.
   if (delegate_)
     delegate_->OnProfilePrepared(profile, browser_launched);
 }
 
 void UserSessionManager::ActivateWizard(const std::string& screen_name) {
   LoginDisplayHost* host = LoginDisplayHostImpl::default_host();
-  DCHECK(host);
-  if (host) {
-    scoped_ptr<base::DictionaryValue> params;
-    host->StartWizard(screen_name, params.Pass());
-  }
+  CHECK(host);
+  scoped_ptr<base::DictionaryValue> params;
+  host->StartWizard(screen_name, params.Pass());
 }
 
 void UserSessionManager::InitializeStartUrls() const {
   std::vector<std::string> start_urls;
 
   const base::ListValue *urls;
   user_manager::UserManager* user_manager = user_manager::UserManager::Get();
   bool can_show_getstarted_guide =
       user_manager->GetActiveUser()->GetType() ==
           user_manager::USER_TYPE_REGULAR &&
@@ skipping 393 matching lines @@
 }
 
 EasyUnlockKeyManager* UserSessionManager::GetEasyUnlockKeyManager() {
   if (!easy_unlock_key_manager_)
     easy_unlock_key_manager_.reset(new EasyUnlockKeyManager);
 
   return easy_unlock_key_manager_.get();
 }
 
 }  // namespace chromeos