Add profiling for FinishConfigureDataTypesOnFrontendLoop (sync).

chrome/browser/sync/glue/sync_backend_host_impl.cc

Index: chrome/browser/sync/glue/sync_backend_host_impl.cc
diff --git a/chrome/browser/sync/glue/sync_backend_host_impl.cc b/chrome/browser/sync/glue/sync_backend_host_impl.cc
index 4114a32fce8218f95f1fb38fbb1b3e1fe786b014..1455d172658c42aa86961de6b856bb87d571312f 100644
--- a/chrome/browser/sync/glue/sync_backend_host_impl.cc
+++ b/chrome/browser/sync/glue/sync_backend_host_impl.cc
@@ -609,6 +609,11 @@ void SyncBackendHostImpl::FinishConfigureDataTypesOnFrontendLoop(
     const syncer::ModelTypeSet failed_configuration_types,
     const base::Callback<void(syncer::ModelTypeSet,
                               syncer::ModelTypeSet)>& ready_task) {
+  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/458406 is
+  // fixed.
+  tracked_objects::ScopedTracker tracking_profile1(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "458406 SyncBackendHostImpl::FinishConfigureDataTOFL"));
   if (!frontend_)
     return;
 
@@ -618,6 +623,11 @@ void SyncBackendHostImpl::FinishConfigureDataTypesOnFrontendLoop(
         ModelTypeSetToObjectIdSet(enabled_types));
   }
 
+  // TODO(erikchen): Remove ScopedTracker below once http://crbug.com/458406 is
+  // fixed.
+  tracked_objects::ScopedTracker tracking_profile2(
+      FROM_HERE_WITH_EXPLICIT_FUNCTION(
+          "458406 SyncBackendHostImpl::FinishConfigureDataTOFL::ReadyTask"));
   if (!ready_task.is_null())
     ready_task.Run(succeeded_configuration_types, failed_configuration_types);
 }