Update oauth2 token endpoint.

google_apis/gaia/fake_gaia.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 GOOGLE_APIS_GAIA_FAKE_GAIA_H_
 #define GOOGLE_APIS_GAIA_FAKE_GAIA_H_
 
 #include <map>
 #include <set>
 #include <string>
@@ skipping 46 matching lines @@
     void Update(const MergeSessionParams& params);
 
     // Values of SID and LSID cookie that are set by /ServiceLoginAuth or its
     // equivalent at the end of the SAML login flow.
     std::string auth_sid_cookie;
     std::string auth_lsid_cookie;
 
     // auth_code cookie value response for /o/oauth2/programmatic_auth call.
     std::string auth_code;
 
-    // OAuth2 refresh and access token generated by /o/oauth2/token call
+    // OAuth2 refresh and access token generated by /oauth2/v4/token call
     // with "...&grant_type=authorization_code".
     std::string refresh_token;
     std::string access_token;
 
     // Uber token response from /OAuthLogin call.
     std::string gaia_uber_token;
 
     // Values of SID and LSID cookie generated from /MergeSession call.
     std::string session_sid_cookie;
     std::string session_lsid_cookie;
@@ skipping 149 matching lines @@
   std::string service_login_response_;
   std::string embedded_setup_chromeos_response_;
   SamlAccountIdpMap saml_account_idp_map_;
   bool issue_oauth_code_cookie_;
   RefreshTokenToDeviceIdMap refresh_token_to_device_id_map_;
 
   DISALLOW_COPY_AND_ASSIGN(FakeGaia);
 };
 
 #endif  // GOOGLE_APIS_GAIA_FAKE_GAIA_H_