Remove dependency on server generated type root folders

sync/syncable/directory.h

Index: sync/syncable/directory.h
diff --git a/sync/syncable/directory.h b/sync/syncable/directory.h
index fc0d510376fe9bed14f46289ee7bbc9c32d7b97b..e0b2e60192c6ee18f0eb61227244e54049d5375d 100644
--- a/sync/syncable/directory.h
+++ b/sync/syncable/directory.h
@@ -199,10 +199,12 @@ class SYNC_EXPORT Directory {
   void GetDownloadProgressAsString(
       ModelType type,
       std::string* value_out) const;
-  size_t GetEntriesCount() const;
   void SetDownloadProgress(
       ModelType type,
       const sync_pb::DataTypeProgressMarker& value);
+  bool HasEmptyDownloadProgress(ModelType type) const;
+
+  size_t GetEntriesCount() const;
 
   // Gets/Increments transaction version of a model type. Must be called when
   // holding kernel mutex.