Add data usage tracking for GAIA auth api

google_apis/gaia/gaia_auth_util.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_GAIA_AUTH_UTIL_H_
 #define GOOGLE_APIS_GAIA_GAIA_AUTH_UTIL_H_
 
 #include <string>
 #include <utility>
 #include <vector>
 
 class GURL;
 
+namespace net {
+class URLFetcher;
+class URLRequest;
+} // namespace net
+
 namespace gaia {
 
 struct ListedAccount {
   // The account's ID, as per Chrome, will be determined in the
   // CookieManagerService.
   std::string id;
   std::string email;
   std::string gaia_id;
   std::string raw_email;
   bool valid;
@@ skipping 28 matching lines @@
 // Parses JSON data returned by /ListAccounts call, returning a vector of
 // email/valid pairs.  An email addresses is considered valid if a passive
 // login would succeed (i.e. the user does not need to reauthenticate).
 // If there an error parsing the JSON, then false is returned.
 // If either |accounts| or |signed_out_accounts| is null, the corresponding
 // accounts returned from /ListAccounts will be ignored.
 bool ParseListAccountsData(const std::string& data,
                            std::vector<ListedAccount>* accounts,
                            std::vector<ListedAccount>* signed_out_accounts);
 
+// Returns true if the URL request originated from GAIA.
+bool RequestOriginatedFromGaia(const net::URLRequest& request);
+
+// Marks the URL request as a Gaia request.
+void MarkURLFetcherAsGaia(net::URLFetcher* request);
+
 }  // namespace gaia
 
 #endif  // GOOGLE_APIS_GAIA_GAIA_AUTH_UTIL_H_