Revert of Fetch OAuth2 tokens prior to profile creation.

chrome/browser/chromeos/login/signin/oauth2_token_initializer.h

-// Copyright 2015 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_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_
-#define CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_
-
-#include <string>
-
-#include "base/callback.h"
-#include "base/macros.h"
-#include "base/memory/scoped_ptr.h"
-#include "chrome/browser/chromeos/login/signin/oauth2_token_fetcher.h"
-#include "chromeos/login/auth/user_context.h"
-
-namespace chromeos {
-
-// Performs initial fetch of OAuth2 Tokens.
-class OAuth2TokenInitializer final : public OAuth2TokenFetcher::Delegate {
- public:
-  // Callback to be invoked after initialization is done.
-  using FetchOAuth2TokensCallback =
-      base::Callback<void(bool success, const UserContext& user_context)>;
-
-  OAuth2TokenInitializer();
-  ~OAuth2TokenInitializer() override;
-
-  // Fetch OAuth2 tokens.
-  void Start(const UserContext& context,
-             const FetchOAuth2TokensCallback& callback);
-
- private:
-  // OAuth2TokenFetcher::Delegate overrides.
-  void OnOAuth2TokensAvailable(
-      const GaiaAuthConsumer::ClientOAuthResult& oauth2_tokens) override;
-  void OnOAuth2TokensFetchFailed() override;
-
-  UserContext user_context_;
-  FetchOAuth2TokensCallback callback_;
-  scoped_ptr<OAuth2TokenFetcher> oauth2_token_fetcher_;
-
-  DISALLOW_COPY_AND_ASSIGN(OAuth2TokenInitializer);
-};
-
-}  // namespace chromeos
-
-#endif  // CHROME_BROWSER_CHROMEOS_LOGIN_SIGNIN_OAUTH2_TOKEN_INITIALIZER_H_