Add data usage tracking for GAIA auth api

google_apis/gaia/oauth2_api_call_flow.cc

 // 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.
 
 #include "google_apis/gaia/oauth2_api_call_flow.h"
 
 #include <string>
 #include <vector>
 
 #include "base/strings/stringprintf.h"
+#include "google_apis/gaia/gaia_auth_util.h"
 #include "google_apis/gaia/gaia_urls.h"
 #include "net/base/escape.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_request_context_getter.h"
 #include "net/url_request/url_request_status.h"
 
 using net::URLFetcher;
 using net::URLFetcherDelegate;
 using net::URLRequestContextGetter;
@@ skipping 53 matching lines @@
 }
 
 std::unique_ptr<URLFetcher> OAuth2ApiCallFlow::CreateURLFetcher(
     net::URLRequestContextGetter* context,
     const std::string& access_token) {
   std::string body = CreateApiCallBody();
   net::URLFetcher::RequestType request_type = GetRequestTypeForBody(body);
   std::unique_ptr<URLFetcher> result =
       net::URLFetcher::Create(0, CreateApiCallUrl(), request_type, this);
 
+  gaia::MarkURLFetcherAsGaia(result.get());
   result->SetRequestContext(context);
   result->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                        net::LOAD_DO_NOT_SAVE_COOKIES);
   result->AddExtraRequestHeader(MakeAuthorizationHeader(access_token));
   // Fetchers are sometimes cancelled because a network change was detected,
   // especially at startup and after sign-in on ChromeOS. Retrying once should
   // be enough in those cases; let the fetcher retry up to 3 times just in case.
   // http://crbug.com/163710
   result->SetAutomaticallyRetryOnNetworkChanges(3);
 
   // Even if the the body is empty, we still set the Content-Type because an
   // empty string may be a meaningful value. For example, a Protocol Buffer
   // message with only default values will be serialized as an empty string.
   if (request_type != net::URLFetcher::GET)
     result->SetUploadData(CreateApiCallBodyContentType(), body);
 
   return result;
 }