Remove dependency on server generated type root folders

sync/syncable/directory.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef SYNC_SYNCABLE_DIRECTORY_H_
 #define SYNC_SYNCABLE_DIRECTORY_H_
 
 #include <deque>
 #include <set>
 #include <string>
@@ skipping 181 matching lines @@
   bool good() const { return NULL != kernel_; }
 
   // The download progress is an opaque token provided by the sync server
   // to indicate the continuation state of the next GetUpdates operation.
   void GetDownloadProgress(
       ModelType type,
       sync_pb::DataTypeProgressMarker* value_out) const;
   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.
   int64 GetTransactionVersion(ModelType type) const;
   void IncrementTransactionVersion(ModelType type);
 
   // Getter/setters for the per datatype context.
   void GetDataTypeContext(BaseTransaction* trans,
                           ModelType type,
                           sync_pb::DataTypeContext* context) const;
@@ skipping 428 matching lines @@
   // are deleted in native models as well.
   scoped_ptr<DeleteJournal> delete_journal_;
 
   DISALLOW_COPY_AND_ASSIGN(Directory);
 };
 
 }  // namespace syncable
 }  // namespace syncer
 
 #endif // SYNC_SYNCABLE_DIRECTORY_H_