Handling of multiple concurrent requests from different clients in OAuth2TokenService

google_apis/gaia/oauth2_access_token_fetcher.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_ACCESS_TOKEN_FETCHER_H_
 #define GOOGLE_APIS_GAIA_OAUTH2_ACCESS_TOKEN_FETCHER_H_
 
 #include <string>
 #include <vector>
 
@@ skipping 76 matching lines @@
   static GURL MakeGetAccessTokenUrl();
   static std::string MakeGetAccessTokenBody(
       const std::string& client_id,
       const std::string& client_secret,
       const std::string& refresh_token,
       const std::vector<std::string>& scopes);
   static bool ParseGetAccessTokenResponse(const net::URLFetcher* source,
                                           std::string* access_token,
                                           int* expires_in);
 
+  // Resets |last_fetcher_id_| to 0.
+  static void ResetLastFetcherIdForTest();

[fgorski, 2013/08/29 23:37:44]

To check in you will either need to make the method public or friend
UserPolicySigninServiceTest.SignOutThenSignInAgain, and add a reset in line 788
of that file.

+
   // State that is set during construction.
   OAuth2AccessTokenConsumer* const consumer_;
   net::URLRequestContextGetter* const getter_;
   State state_;
 
   // While a fetch is in progress.
   scoped_ptr<net::URLFetcher> fetcher_;
   std::string client_id_;
   std::string client_secret_;
   std::string refresh_token_;
   std::vector<std::string> scopes_;
 
+  // The last fetcher id.
+  static int last_fetcher_id_;
+
   friend class OAuth2AccessTokenFetcherTest;
+  friend class OAuth2TokenServiceTest;
   FRIEND_TEST_ALL_PREFIXES(OAuth2AccessTokenFetcherTest,
                            ParseGetAccessTokenResponse);
   FRIEND_TEST_ALL_PREFIXES(OAuth2AccessTokenFetcherTest,
                            MakeGetAccessTokenBody);
 
   DISALLOW_COPY_AND_ASSIGN(OAuth2AccessTokenFetcher);
 };
 
 #endif  // GOOGLE_APIS_GAIA_OAUTH2_ACCESS_TOKEN_FETCHER_H_