Use delete journal to remove bookmarks that are already deleted in sync model

sync/internal_api/public/base_transaction.h

Index: sync/internal_api/public/base_transaction.h
diff --git a/sync/internal_api/public/base_transaction.h b/sync/internal_api/public/base_transaction.h
index 7a2ba37e3a2414a208519919515454da3217ed51..e40f7e51bf8c269f15469d8832c164d9cccebb6f 100644
--- a/sync/internal_api/public/base_transaction.h
+++ b/sync/internal_api/public/base_transaction.h
@@ -5,8 +5,8 @@
 #ifndef SYNC_INTERNAL_API_PUBLIC_BASE_TRANSACTION_H_
 #define SYNC_INTERNAL_API_PUBLIC_BASE_TRANSACTION_H_
 
+#include "sync/api/sync_data.h"
 #include "sync/internal_api/public/user_share.h"
-
 #include "sync/internal_api/public/base/model_type.h"
 #include "sync/util/cryptographer.h"
 
@@ -43,6 +43,13 @@ class BaseTransaction {
     return user_share_;
   }
 
+  // Query directory for delete journals of |type|. Covert to SyncData and
+  // return.
+  void GetDeletedSyncData(ModelType type, SyncDataList *deleted) const;
+
+  // Purge delete journals with given IDs from directory.
+  void PurgeDeletedSyncData(const std::set<int64>& ids);
+
  protected:
   explicit BaseTransaction(UserShare* share);
   virtual ~BaseTransaction();