[cros] Display emails of users are stored in a separate dictionary in Local State.

chrome/browser/chromeos/login/remove_user_delegate.h

+// Copyright (c) 2011 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_REMOVE_USER_DELEGATE_H_
+#define CHROME_BROWSER_CHROMEOS_LOGIN_REMOVE_USER_DELEGATE_H_
+#pragma once
+
+namespace chromeos {
+
+// Delegate to be used with |UserManager::RemoveUser|.
+class RemoveUserDelegate {
+ public:
+  // Called right before actual user removal process is initiated.
+  virtual void OnBeforeUserRemoved(const std::string& username) = 0;
+
+  // Called right after user removal process has been initiated.
+  virtual void OnUserRemoved(const std::string& username) = 0;
+};
+
+}  // namespace chromeos
+
+#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_REMOVE_USER_DELEGATE_H_