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

chrome/browser/ui/webui/chromeos/login/oobe_ui.h

Index: chrome/browser/ui/webui/chromeos/login/oobe_ui.h
diff --git a/chrome/browser/ui/webui/chromeos/login/oobe_ui.h b/chrome/browser/ui/webui/chromeos/login/oobe_ui.h
index a9796391815e6c91f1a5c00704e9c900a353d1da..035cbbdc9bbc346dc46f5145ea48be3859f7d40a 100644
--- a/chrome/browser/ui/webui/chromeos/login/oobe_ui.h
+++ b/chrome/browser/ui/webui/chromeos/login/oobe_ui.h
@@ -38,6 +38,7 @@ class ControllerPairingScreenView;
 class CoreOobeView;
 class DeviceDisabledScreenView;
 class EnableDebuggingScreenView;
+class EncryptionMigrationScreenView;
 class EnrollmentScreenView;
 class EulaView;
 class ErrorScreen;
@@ -114,6 +115,7 @@ class OobeUI : public content::WebUIController,
   ControllerPairingScreenView* GetControllerPairingScreenView();
   HostPairingScreenView* GetHostPairingScreenView();
   DeviceDisabledScreenView* GetDeviceDisabledScreenView();
+  EncryptionMigrationScreenView* GetEncryptionMigrationScreenView();
   GaiaView* GetGaiaScreenView();
   UserBoardView* GetUserBoardView();