Extract OAuth2AccessTokenFetcher interface.

chrome/browser/chromeos/login/oauth2_login_verifier.h

 // Copyright (c) 2013 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_OAUTH2_LOGIN_VERIFIER_H_
 #define CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_LOGIN_VERIFIER_H_
 
 #include <string>
 
 #include "base/basictypes.h"
 #include "base/callback_forward.h"
 #include "base/compiler_specific.h"
 #include "base/memory/ref_counted.h"
 #include "base/memory/scoped_ptr.h"
 #include "base/memory/weak_ptr.h"
 #include "chrome/browser/profiles/profile.h"
 #include "google_apis/gaia/gaia_auth_consumer.h"
 #include "google_apis/gaia/gaia_auth_fetcher.h"
-#include "google_apis/gaia/oauth2_access_token_fetcher.h"
 #include "google_apis/gaia/oauth2_token_service.h"
 #include "net/url_request/url_request_context_getter.h"
 
 namespace chromeos {
 
 // Given the OAuth2 refresh token, this class will try to exchange it for GAIA
 // credentials (SID+LSID) and populate current session's cookie jar.
 class OAuth2LoginVerifier : public base::SupportsWeakPtr<OAuth2LoginVerifier>,
                             public GaiaAuthConsumer,
                             public OAuth2TokenService::Consumer {
@@ skipping 90 matching lines @@
   scoped_ptr<OAuth2TokenService::Request> login_token_request_;
   // The retry counter. Increment this only when failure happened.
   int retry_count_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2LoginVerifier);
 };
 
 }  // namespace chromeos
 
 #endif  // CHROME_BROWSER_CHROMEOS_LOGIN_OAUTH2_LOGIN_VERIFIER_H_