cros: Fold UserBoardModel into UserSelectionScreen.

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 <stddef.h>
 
 #include <utility>
 
@@ skipping 115 matching lines @@
   PinStorage* pin_storage = PinStorageFactory::GetForUser(user);
   if (!pin_storage)
     return false;
 
   return pin_storage->IsPinAuthenticationAvailable();
 }
 
 }  // namespace
 
 UserSelectionScreen::UserSelectionScreen(const std::string& display_type)
-    : handler_(nullptr),
-      login_display_delegate_(nullptr),
-      view_(nullptr),
+    : BaseScreen(nullptr, OobeScreen::SCREEN_USER_SELECTION),
       display_type_(display_type),
-      weak_factory_(this) {
-}
+      weak_factory_(this) {}
 
 UserSelectionScreen::~UserSelectionScreen() {
   proximity_auth::ScreenlockBridge::Get()->SetLockHandler(nullptr);
   ui::UserActivityDetector* activity_detector = ui::UserActivityDetector::Get();
   if (activity_detector && activity_detector->HasObserver(this))
     activity_detector->RemoveObserver(this);
 }
 
 void UserSelectionScreen::InitEasyUnlock() {
   proximity_auth::ScreenlockBridge::Get()->SetLockHandler(this);
@@ skipping 374 matching lines @@
   DCHECK_EQ(GetScreenType(), SIGNIN_SCREEN);
 
   UserContext user_context(account_id);
   user_context.SetAuthFlow(UserContext::AUTH_FLOW_EASY_UNLOCK);
   user_context.SetKey(Key(secret));
   user_context.GetKey()->SetLabel(key_label);
 
   login_display_delegate_->Login(user_context, SigninSpecifics());
 }
 
+void UserSelectionScreen::Show() {}
+
+void UserSelectionScreen::Hide() {}
+
 void UserSelectionScreen::HardLockPod(const AccountId& account_id) {
   view_->SetAuthType(account_id, OFFLINE_PASSWORD, base::string16());
   EasyUnlockService* service = GetEasyUnlockServiceForUser(account_id);
   if (!service)
     return;
   service->SetHardlockState(EasyUnlockScreenlockStateHandler::USER_HARDLOCK);
 }
 
 void UserSelectionScreen::AttemptEasyUnlock(const AccountId& account_id) {
   EasyUnlockService* service = GetEasyUnlockServiceForUser(account_id);
@@ skipping 30 matching lines @@
   // The user profile should exist if and only if this is the lock screen.
   DCHECK_EQ(!!profile, GetScreenType() == LOCK_SCREEN);
 
   if (!profile)
     profile = profile_helper->GetSigninProfile();
 
   return EasyUnlockService::Get(profile);
 }
 
 }  // namespace chromeos