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

components/leveldb/leveldb_service_impl.cc

Index: components/leveldb/leveldb_service_impl.cc
diff --git a/components/leveldb/leveldb_service_impl.cc b/components/leveldb/leveldb_service_impl.cc
index 6df7ad0b9cc738dc6ef6b73eb7ef6999e3e7c874..596d4d7d222f0738e7e9c937323ace236b35e809 100644
--- a/components/leveldb/leveldb_service_impl.cc
+++ b/components/leveldb/leveldb_service_impl.cc
@@ -92,4 +92,16 @@ void LevelDBServiceImpl::OpenInMemory(
   callback.Run(LeveldbStatusToError(s));
 }
 
+void LevelDBServiceImpl::Destroy(filesystem::mojom::DirectoryPtr directory,
+                                 const std::string& dbname,
+                                 const DestroyCallback& callback) {
+  leveldb::Options options;
+  // Register our directory with the file thread.
+  LevelDBMojoProxy::OpaqueDir* dir =
+      thread_->RegisterDirectory(std::move(directory));
+  std::unique_ptr<MojoEnv> env_mojo(new MojoEnv(thread_, dir));
+  options.env = env_mojo.get();
+  callback.Run(LeveldbStatusToError(leveldb::DestroyDB(dbname, options)));
+}
+
 }  // namespace leveldb