Easy Unlock: Add support for hard locking

chrome/browser/chromeos/login/screens/user_selection_screen.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/screens/user_selection_screen.h"
 
 #include <vector>
 
 #include "ash/shell.h"
 #include "base/location.h"
@@ skipping 344 matching lines @@
   handler_->LoadUsers(users_list, show_guest_);
 }
 
 void UserSelectionScreen::HandleGetUsers() {
   SendUserList();
 }
 
 void UserSelectionScreen::SetAuthType(
     const std::string& username,
     ScreenlockBridge::LockHandler::AuthType auth_type) {
+  DCHECK(GetAuthType(username) !=
+             ScreenlockBridge::LockHandler::FORCE_OFFLINE_PASSWORD ||
+         auth_type == ScreenlockBridge::LockHandler::FORCE_OFFLINE_PASSWORD);
   user_auth_type_map_[username] = auth_type;
 }
 
 ScreenlockBridge::LockHandler::AuthType UserSelectionScreen::GetAuthType(
     const std::string& username) const {
   if (user_auth_type_map_.find(username) == user_auth_type_map_.end())
     return ScreenlockBridge::LockHandler::OFFLINE_PASSWORD;
   return user_auth_type_map_.find(username)->second;
 }
 
 }  // namespace chromeos