cros: Refactor oobe LoadUsers to include non-serialized user list.

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

Index: chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
diff --git a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
index 8d80ab42ca1479ce5e8b8916747a5f8e3339a8ec..933ca0e7920c77f668f5527f72d6bfe556bfe954 100644
--- a/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
+++ b/chrome/browser/ui/webui/chromeos/login/signin_screen_handler.h
@@ -97,8 +97,9 @@ class LoginDisplayWebUIHandler {
                                         const std::string& password) = 0;
   virtual void ShowWhitelistCheckFailedError() = 0;
   virtual void ShowUnrecoverableCrypthomeErrorDialog() = 0;
-  virtual void LoadUsers(const base::ListValue& users_list,
-                         bool show_guest) = 0;
+  virtual void LoadUsers(const user_manager::UserList& users,
+                         const base::ListValue& users_list) = 0;
+
  protected:
   virtual ~LoginDisplayWebUIHandler() {}
 };
@@ -329,7 +330,8 @@ class SigninScreenHandler
                                 const std::string& password) override;
   void ShowWhitelistCheckFailedError() override;
   void ShowUnrecoverableCrypthomeErrorDialog() override;
-  void LoadUsers(const base::ListValue& users_list, bool show_guest) override;
+  void LoadUsers(const user_manager::UserList& users,
+                 const base::ListValue& users_list) override;
 
   // content::NotificationObserver implementation:
   void Observe(int type,