Report data usage UMA for Chrome services

sync/internal_api/attachments/attachment_downloader_impl.cc

Index: sync/internal_api/attachments/attachment_downloader_impl.cc
diff --git a/sync/internal_api/attachments/attachment_downloader_impl.cc b/sync/internal_api/attachments/attachment_downloader_impl.cc
index 2915296d9f1bf88fca9d8c13ceffa83594bbaf2a..267acf9e4dfe86a1ee345163946fd98e023ef7fe 100644
--- a/sync/internal_api/attachments/attachment_downloader_impl.cc
+++ b/sync/internal_api/attachments/attachment_downloader_impl.cc
@@ -12,6 +12,7 @@
 #include "base/metrics/sparse_histogram.h"
 #include "base/sys_byteorder.h"
 #include "base/time/time.h"
+#include "components/data_use_measurement/core/data_use_user_data.h"
 #include "net/base/load_flags.h"
 #include "net/http/http_response_headers.h"
 #include "net/http/http_status_code.h"
@@ -208,6 +209,8 @@ scoped_ptr<net::URLFetcher> AttachmentDownloaderImpl::CreateFetcher(
     const std::string& access_token) {
   scoped_ptr<net::URLFetcher> url_fetcher =
       net::URLFetcher::Create(GURL(url), net::URLFetcher::GET, this);
+  data_use_measurement::DataUseUserData::AttachToFetcher(
+      url_fetcher.get(), data_use_measurement::DataUseUserData::SYNC);
   AttachmentUploaderImpl::ConfigureURLFetcherCommon(
       url_fetcher.get(), access_token, raw_store_birthday_, model_type_,
       url_request_context_getter_.get());