Revert "Migrate the IndexedDB backend from Blink to Chromium"

content/browser/indexed_db/leveldb/leveldb_database.h

-// Copyright (c) 2013 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 CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_
-#define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_
-
-#include <vector>
-
-#include "base/files/file_path.h"
-#include "base/memory/scoped_ptr.h"
-#include "base/string16.h"
-#include "content/common/content_export.h"
-
-namespace leveldb {
-class Comparator;
-class DB;
-class Env;
-class Snapshot;
-}
-
-namespace content {
-
-class LevelDBComparator;
-class LevelDBDatabase;
-class LevelDBIterator;
-class LevelDBSlice;
-class LevelDBWriteBatch;
-
-class LevelDBSnapshot {
- private:
-  friend class LevelDBDatabase;
-  friend class LevelDBTransaction;
-
-  explicit LevelDBSnapshot(LevelDBDatabase* db);
-  ~LevelDBSnapshot();
-
-  leveldb::DB* db_;
-  const leveldb::Snapshot* snapshot_;
-};
-
-class CONTENT_EXPORT LevelDBDatabase {
- public:
-  static scoped_ptr<LevelDBDatabase> Open(const base::FilePath& file_name,
-                                          const LevelDBComparator* comparator);
-  static scoped_ptr<LevelDBDatabase> OpenInMemory(
-      const LevelDBComparator* comparator);
-  static bool Destroy(const base::FilePath& file_name);
-  virtual ~LevelDBDatabase();
-
-  bool Put(const LevelDBSlice& key, const std::vector<char>& value);
-  bool Remove(const LevelDBSlice& key);
-  virtual bool Get(const LevelDBSlice& key,
-                   std::vector<char>& value,
-                   bool& found,
-                   const LevelDBSnapshot* = 0);
-  bool Write(LevelDBWriteBatch& batch);
-  scoped_ptr<LevelDBIterator> CreateIterator(const LevelDBSnapshot* = 0);
-  const LevelDBComparator* Comparator() const;
-
- protected:
-  LevelDBDatabase();
-
- private:
-  friend class LevelDBSnapshot;
-
-  scoped_ptr<leveldb::Env> env_;
-  scoped_ptr<leveldb::Comparator> comparator_adapter_;
-  scoped_ptr<leveldb::DB> db_;
-  const LevelDBComparator* comparator_;
-};
-
-}  // namespace content
-
-#endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_DATABASE_H_