Add a screen to migrate filesystem encryption from eCryptfs to ext4 crypto.

chrome/browser/chromeos/login/wizard_controller.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_CONTROLLER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_CONTROLLER_H_
 
 #include <map>
 #include <memory>
 #include <string>
@@ skipping 128 matching lines @@
   void ShowTermsOfServiceScreen();
   void ShowArcTermsOfServiceScreen();
   void ShowWrongHWIDScreen();
   void ShowAutoEnrollmentCheckScreen();
   void ShowSupervisedUserCreationScreen();
   void ShowArcKioskSplashScreen();
   void ShowHIDDetectionScreen();
   void ShowControllerPairingScreen();
   void ShowHostPairingScreen();
   void ShowDeviceDisabledScreen();
+  void ShowEncryptionMigrationScreen();
 
   // Shows images login screen.
   void ShowLoginScreen(const LoginScreenContext& context);
 
   // Exit handlers:
   void OnHIDDetectionCompleted();
   void OnNetworkConnected();
   void OnNetworkOffline();
   void OnConnectionFailed();
   void OnUpdateCompleted();
@@ skipping 253 matching lines @@
   BaseScreen* hid_screen_ = nullptr;
 
   base::WeakPtrFactory<WizardController> weak_factory_;
 
   DISALLOW_COPY_AND_ASSIGN(WizardController);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_WIZARD_CONTROLLER_H_