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

sync/internal_api/public/base_transaction.h

 // Copyright (c) 2012 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_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"
 
 namespace syncer {
 
 namespace syncable {
 class BaseTransaction;
 class Directory;
 }
 
@@ skipping 16 matching lines @@
       return NULL;
     } else {
       return user_share_->directory.get();
     }
   }
 
   UserShare* GetUserShare() const {
     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();
 
   BaseTransaction() : user_share_(NULL) { }
 
  private:
   UserShare* user_share_;
 
   DISALLOW_COPY_AND_ASSIGN(BaseTransaction);
 };
 
 }  // namespace syncer
 
 #endif  // SYNC_INTERNAL_API_PUBLIC_BASE_TRANSACTION_H_