[Sync] Add histograms for cookie jar state on Sessions commit

sync/engine/syncer.cc

Index: sync/engine/syncer.cc
diff --git a/sync/engine/syncer.cc b/sync/engine/syncer.cc
index eddfb491e4f47ef9ca5533e3152d65d03db510d1..fa2ecfb959bab69ab0848a8fe0c5375a67bb8949 100644
--- a/sync/engine/syncer.cc
+++ b/sync/engine/syncer.cc
@@ -184,7 +184,9 @@ SyncerError Syncer::BuildAndPostCommits(ModelTypeSet requested_types,
         session->context()->max_commit_batch_size(),
         session->context()->account_name(),
         session->context()->directory()->cache_guid(),
-        session->context()->cookie_jar_mismatch(), commit_processor,
+        session->context()->cookie_jar_mismatch(),
+        session->context()->cookie_jar_empty(),
+        commit_processor,
         session->context()->extensions_activity()));
     if (!commit) {
       break;