Fix lifetime of leveldb::MojoEnv instances.

components/leveldb/leveldb_database_impl.cc

Index: components/leveldb/leveldb_database_impl.cc
diff --git a/components/leveldb/leveldb_database_impl.cc b/components/leveldb/leveldb_database_impl.cc
index 5387409d2d4b055f526d2ec0c7d58eb4658751db..4eecfe9a935a36def417c8d155fedc24ac6d5fd1 100644
--- a/components/leveldb/leveldb_database_impl.cc
+++ b/components/leveldb/leveldb_database_impl.cc
@@ -34,10 +34,14 @@ leveldb::Status ForEachWithPrefix(leveldb::DB* db,
 
 }  // namespace
 
+LevelDBDatabaseImpl::LevelDBDatabaseImpl(std::unique_ptr<Env> owned_environment,
+                                         std::unique_ptr<DB> db)
+    : owned_environment_(std::move(owned_environment)), db_(std::move(db)) {}
+
 LevelDBDatabaseImpl::LevelDBDatabaseImpl(
-    std::unique_ptr<leveldb::Env> environment,
+    std::unique_ptr<MojoEnv::Directory> directory,
     std::unique_ptr<leveldb::DB> db)
-    : environment_(std::move(environment)), db_(std::move(db)) {}
+    : directory_(std::move(directory)), db_(std::move(db)) {}
 
 LevelDBDatabaseImpl::~LevelDBDatabaseImpl() {
   for (auto& p : iterator_map_)