cros: Remove AuthenticatedUserEmailRetriever.

chrome/browser/ui/webui/chromeos/login/authenticated_user_email_retriever.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_UI_WEBUI_CHROMEOS_LOGIN_AUTHENTICATED_USER_EMAIL_RETRIEVER_H_
-#define CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_AUTHENTICATED_USER_EMAIL_RETRIEVER_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/compiler_specific.h"
-#include "base/macros.h"
-#include "base/memory/ref_counted.h"
-#include "google_apis/gaia/gaia_auth_consumer.h"
-#include "google_apis/gaia/gaia_auth_fetcher.h"
-
-class GaiaAuthFetcher;
-
-namespace net {
-class URLRequestContextGetter;
-}
-
-namespace chromeos {
-
-// Helper class that retrieves the authenticated user's e-mail address.
-class AuthenticatedUserEmailRetriever : public GaiaAuthConsumer {
- public:
-  typedef base::Callback<void(const std::string&)>
-      AuthenticatedUserEmailCallback;
-
-  // Retrieves the authenticated user's e-mail address from GAIA and passes it
-  // to |callback|. Requires that |url_request_context_getter| contain the GAIA
-  // cookies for exactly one user. If the e-mail address cannot be retrieved, an
-  // empty string is passed to the |callback|.
-  AuthenticatedUserEmailRetriever(
-      const AuthenticatedUserEmailCallback& callback,
-      scoped_refptr<net::URLRequestContextGetter> url_request_context_getter);
-  ~AuthenticatedUserEmailRetriever() override;
-
-  // GaiaAuthConsumer:
-  void OnListAccountsSuccess(const std::string& data) override;
-  void OnListAccountsFailure(const GoogleServiceAuthError& error) override;
-
- private:
-  const AuthenticatedUserEmailCallback callback_;
-  GaiaAuthFetcher gaia_auth_fetcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(AuthenticatedUserEmailRetriever);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_UI_WEBUI_CHROMEOS_LOGIN_AUTHENTICATED_USER_EMAIL_RETRIEVER_H_