Extract OAuth2AccessTokenFetcher interface.

google_apis/gaia/oauth2_api_call_flow.h

 // Copyright (c) 2012 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 GOOGLE_APIS_GAIA_OAUTH2_API_CALL_FLOW_H_
 #define GOOGLE_APIS_GAIA_OAUTH2_API_CALL_FLOW_H_
 
 #include <string>
 
+#include "base/gtest_prod_util.h"
 #include "base/memory/scoped_ptr.h"
 #include "google_apis/gaia/oauth2_access_token_consumer.h"
 #include "google_apis/gaia/oauth2_access_token_fetcher.h"
 #include "net/url_request/url_fetcher_delegate.h"
+#include "url/gurl.h"
 
 class GoogleServiceAuthError;
 class OAuth2MintTokenFlowTest;
 
 namespace net {
 class URLFetcher;
 class URLRequestContextGetter;
 }
 
 // Base class for all classes that implement a flow to call OAuth2
@@ skipping 93 matching lines @@
   // Whether we have already tried minting an access token once.
   bool tried_mint_access_token_;
 
   scoped_ptr<net::URLFetcher> url_fetcher_;
   scoped_ptr<OAuth2AccessTokenFetcher> oauth2_access_token_fetcher_;
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2ApiCallFlow);
 };
 
 #endif  // GOOGLE_APIS_GAIA_OAUTH2_API_CALL_FLOW_H_