Add data usage tracking for supervised_user service

chrome/browser/supervised_user/experimental/safe_search_url_reporter.cc

 // Copyright 2016 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 "chrome/browser/supervised_user/experimental/safe_search_url_reporter.h"
 
 #include "base/callback.h"
 #include "base/json/json_writer.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/stringprintf.h"
 #include "chrome/browser/profiles/profile.h"
 #include "chrome/browser/signin/profile_oauth2_token_service_factory.h"
 #include "chrome/browser/signin/signin_manager_factory.h"
+#include "components/data_use_measurement/core/data_use_user_data.h"
 #include "components/signin/core/browser/profile_oauth2_token_service.h"
 #include "components/signin/core/browser/signin_manager.h"
 #include "components/signin/core/browser/signin_manager_base.h"
 #include "google_apis/gaia/google_service_auth_error.h"
 #include "net/base/load_flags.h"
 #include "net/base/net_errors.h"
 #include "net/http/http_status_code.h"
 #include "net/url_request/url_fetcher.h"
 #include "net/url_request/url_request_status.h"
 #include "url/gurl.h"
@@ skipping 79 matching lines @@
       break;
     it++;
   }
   DCHECK(it != reports_.end());
 
   (*it)->access_token = access_token;
 
   (*it)->url_fetcher = URLFetcher::Create((*it)->url_fetcher_id, GURL(kApiUrl),
                                           URLFetcher::POST, this);
 
+  data_use_measurement::DataUseUserData::AttachToFetcher(
+      (*it)->url_fetcher.get(),
+      data_use_measurement::DataUseUserData::SUPERVISED_USER);
   (*it)->url_fetcher->SetRequestContext(context_);
   (*it)->url_fetcher->SetLoadFlags(net::LOAD_DO_NOT_SEND_COOKIES |
                                    net::LOAD_DO_NOT_SAVE_COOKIES);
   (*it)->url_fetcher->SetAutomaticallyRetryOnNetworkChanges(kNumRetries);
   (*it)->url_fetcher->AddExtraRequestHeader(
       base::StringPrintf(kAuthorizationHeaderFormat, access_token.c_str()));
 
   base::DictionaryValue dict;
   dict.SetStringWithoutPathExpansion(kUrlKey, (*it)->url.spec().c_str());
 
@@ skipping 51 matching lines @@
     return;
   }
 
   DispatchResult(it, true);
 }
 
 void SafeSearchURLReporter::DispatchResult(ReportIterator it, bool success) {
   (*it)->callback.Run(success);
   reports_.erase(it);
 }