cros: Replace WizardController string constants with OobeScreen values.

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

Index: chrome/browser/chromeos/login/ui/login_display_host.h
diff --git a/chrome/browser/chromeos/login/ui/login_display_host.h b/chrome/browser/chromeos/login/ui/login_display_host.h
index 855f42e644097d6aaf5748faecba55cebc34fe29..694932484445296d2846144ce86567fd1dccd815 100644
--- a/chrome/browser/chromeos/login/ui/login_display_host.h
+++ b/chrome/browser/chromeos/login/ui/login_display_host.h
@@ -10,6 +10,7 @@
 #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"
 
@@ -68,7 +69,7 @@ class LoginDisplayHost {
   // 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;
+  virtual void StartWizard(OobeScreen first_screen_name) = 0;

[Alexander Alekseev, 2016/12/13 03:08:05]

nit: as this is no longer name, replace it with "first_screen_id" or something
like that (and everywhere else for first_screen_name).

[jdufault, 2016/12/13 22:30:27]

Done.

 
   // Returns current WizardController, if it exists.
   // Result should not be stored.