Report data usage UMA for Chrome services

chrome/browser/sync/glue/sync_backend_host_core.cc

Index: chrome/browser/sync/glue/sync_backend_host_core.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_core.cc b/chrome/browser/sync/glue/sync_backend_host_core.cc
index 4634c8178ddffb403b7909aadeda6c360d15e29c..fd00017c11dbfe2858b67a47f2dfb422d8e4524e 100644
--- a/chrome/browser/sync/glue/sync_backend_host_core.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_core.cc
@@ -4,12 +4,15 @@
 
 #include "chrome/browser/sync/glue/sync_backend_host_core.h"
 
+#include "base/bind.h"
+#include "base/callback.h"
 #include "base/files/file_util.h"
 #include "base/location.h"
 #include "base/metrics/histogram.h"
 #include "base/single_thread_task_runner.h"
 #include "chrome/browser/sync/glue/local_device_info_provider_impl.h"
 #include "chrome/browser/sync/glue/sync_backend_registrar.h"
+#include "components/data_use_measurement/core/data_use_user_data.h"
 #include "components/invalidation/public/invalidation_util.h"
 #include "components/invalidation/public/object_id_invalidation_map.h"
 #include "components/sync_driver/invalidation_adapter.h"
@@ -36,7 +39,12 @@ static const int kSaveChangesIntervalSeconds = 10;
 
 namespace syncer {
 class InternalComponentsFactory;
-}  // namespace syncer
+}
+// namespace syncer

[amohammadkhan, 2015/09/09 18:49:22]

I'll move the comment up in next CL upload.

+
+namespace net {
+class URLFetcher;
+}
 
 namespace {
 
@@ -49,6 +57,11 @@ enum SyncBackendInitState {
     SYNC_BACKEND_INIT_STATE_COUNT
 };
 
+void BindFetcherToDataTracker(net::URLFetcher* fetcher) {
+  data_use_measurement::DataUseUserData::AttachToFetcher(
+      fetcher, data_use_measurement::DataUseUserData::SYNC);
+}
+
 }  // namespace
 
 namespace browser_sync {
@@ -425,7 +438,8 @@ void SyncBackendHostCore::DoInitialize(
 
   // Finish initializing the HttpBridgeFactory.  We do this here because
   // building the user agent may block on some platforms.
-  options->http_bridge_factory->Init(options->sync_user_agent);
+  options->http_bridge_factory->Init(options->sync_user_agent,
+                                     base::Bind(&BindFetcherToDataTracker));
 
   // Blow away the partial or corrupt sync data folder before doing any more
   // initialization, if necessary.