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

chrome/browser/chromeos/login/remove_user_delegate.h

Index: chrome/browser/chromeos/login/remove_user_delegate.h
diff --git a/chrome/browser/chromeos/login/remove_user_delegate.h b/chrome/browser/chromeos/login/remove_user_delegate.h
new file mode 100644
index 0000000000000000000000000000000000000000..a4397e60d3b7ad8200abe3c31e50834e11915227
--- /dev/null
+++ b/chrome/browser/chromeos/login/remove_user_delegate.h
@@ -0,0 +1,23 @@
+// 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_