|  | // Copyright 2015 The Chromium Authors | 
|  | // Use of this source code is governed by a BSD-style license that can be | 
|  | // found in the LICENSE file. | 
|  |  | 
|  | #ifndef CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_LEVELDB_ENV_H_ | 
|  | #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_LEVELDB_ENV_H_ | 
|  |  | 
|  | #include <tuple> | 
|  |  | 
|  | #include "base/no_destructor.h" | 
|  | #include "content/common/content_export.h" | 
|  | #include "third_party/leveldatabase/env_chromium.h" | 
|  |  | 
|  | namespace content { | 
|  |  | 
|  | // The leveldb::Env used by the Indexed DB backend. | 
|  | class IndexedDBLevelDBEnv : public leveldb_env::ChromiumEnv { | 
|  | public: | 
|  | CONTENT_EXPORT static IndexedDBLevelDBEnv* Get(); | 
|  |  | 
|  | private: | 
|  | friend class base::NoDestructor<IndexedDBLevelDBEnv>; | 
|  | IndexedDBLevelDBEnv(); | 
|  | }; | 
|  |  | 
|  | }  // namespace content | 
|  |  | 
|  | #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_LEVELDB_ENV_H_ |