Sync: fix for the code that checks whether the initial download has completed

sync/engine/directory_update_handler.h

Index: sync/engine/directory_update_handler.h
diff --git a/sync/engine/directory_update_handler.h b/sync/engine/directory_update_handler.h
index 246d412a87d274f12487b9ff89da2168284dda57..df94f3413ad644d004c7eee93baaaef7542b4e35 100644
--- a/sync/engine/directory_update_handler.h
+++ b/sync/engine/directory_update_handler.h
@@ -68,6 +68,11 @@ class SYNC_EXPORT_PRIVATE DirectoryUpdateHandler : public UpdateHandler {
   // Sometimes there is nothing to do, so we can return without doing anything.
   bool IsApplyUpdatesRequired();
 
+  // Called at the end of ApplyUpdates and PassiveApplyUpdates and performs
+  // steps common to both (even when IsApplyUpdatesRequired has returned
+  // false).
+  void PostApplyUpdates();
+
   // Processes the given SyncEntities and stores their data in the directory.
   // Their types must match this update handler's type.
   void UpdateSyncEntities(