Delete and try to recreate localstorage database on invalid schema version.

components/leveldb/leveldb_service_impl.h

 // Copyright 2016 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 COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_
 #define COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_
 
 #include "base/memory/ref_counted.h"
 #include "components/leveldb/leveldb_mojo_proxy.h"
 #include "components/leveldb/public/interfaces/leveldb.mojom.h"
@@ skipping 12 matching lines @@
             const std::string& dbname,
             leveldb::mojom::LevelDBDatabaseRequest database,
             const OpenCallback& callback) override;
   void OpenWithOptions(leveldb::mojom::OpenOptionsPtr open_options,
                        filesystem::mojom::DirectoryPtr directory,
                        const std::string& dbname,
                        leveldb::mojom::LevelDBDatabaseRequest database,
                        const OpenCallback& callback) override;
   void OpenInMemory(leveldb::mojom::LevelDBDatabaseRequest database,
                     const OpenInMemoryCallback& callback) override;
+  void Destroy(filesystem::mojom::DirectoryPtr directory,
+               const std::string& dbname,
+               const DestroyCallback& callback) override;
 
  private:
   // Thread to own the mojo message pipe. Because leveldb spawns multiple
   // threads that want to call file stuff, we create a dedicated thread to send
   // and receive mojo message calls.
   scoped_refptr<LevelDBMojoProxy> thread_;
 
   DISALLOW_COPY_AND_ASSIGN(LevelDBServiceImpl);
 };
 
 }  // namespace leveldb
 
 #endif  // COMPONENTS_LEVELDB_LEVELDB_SERVICE_IMPL_H_