Migrate the IndexedDB backend from Blink to Chromium

content/browser/indexed_db/leveldb/leveldb_iterator.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_ITERATOR_H_
+#define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_
+
+#include "content/browser/indexed_db/leveldb/leveldb_slice.h"
+
+namespace content {
+
+class LevelDBIterator {
+ public:
+  virtual ~LevelDBIterator() {}
+  virtual bool IsValid() const = 0;
+  virtual void SeekToLast() = 0;
+  virtual void Seek(const LevelDBSlice& target) = 0;
+  virtual void Next() = 0;
+  virtual void Prev() = 0;
+  virtual LevelDBSlice Key() const = 0;
+  virtual LevelDBSlice Value() const = 0;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_ITERATOR_H_