cros: Replace WizardController string constants with OobeScreen values.

chrome/browser/chromeos/login/ui/login_display_host.h

 // 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.
 
 #ifndef CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_
 
 #include <string>
 
 #include "base/callback.h"
 #include "base/callback_list.h"
 #include "chrome/browser/chromeos/customization/customization_document.h"
+#include "chrome/browser/chromeos/login/oobe_screen.h"
 #include "chrome/browser/chromeos/login/ui/login_display.h"
 #include "ui/gfx/native_widget_types.h"
 
 namespace chromeos {
 
 class AppLaunchController;
 class AutoEnrollmentController;
 class LoginScreenContext;
 class OobeUI;
 class WebUILoginView;
@@ skipping 37 matching lines @@
   virtual void OpenProxySettings() = 0;
 
   // Toggles status area visibility.
   virtual void SetStatusAreaVisible(bool visible) = 0;
 
   // Gets the auto-enrollment client.
   virtual AutoEnrollmentController* GetAutoEnrollmentController() = 0;
 
   // Starts out-of-box-experience flow or shows other screen handled by
   // Wizard controller i.e. camera, recovery.
-  // One could specify start screen with |first_screen_name|.
-  virtual void StartWizard(const std::string& first_screen_name) = 0;
+  // One could specify start screen with |first_screen|.
+  virtual void StartWizard(OobeScreen first_screen) = 0;
 
   // Returns current WizardController, if it exists.
   // Result should not be stored.
   virtual WizardController* GetWizardController() = 0;
 
   // Returns current AppLaunchController, if it exists.
   // Result should not be stored.
   virtual AppLaunchController* GetAppLaunchController() = 0;
 
   // Starts screen for adding user into session.
@@ skipping 23 matching lines @@
   virtual void StartDemoAppLaunch() = 0;
 
  protected:
   // Default LoginDisplayHost. Child class sets the reference.
   static LoginDisplayHost* default_host_;
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_UI_LOGIN_DISPLAY_HOST_H_