Migrate the IndexedDB backend from Blink to Chromium

content/browser/indexed_db/leveldb/leveldb_slice.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_SLICE_H_
+#define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_SLICE_H_
+
+#include <vector>
+
+#include "base/logging.h"
+
+namespace content {
+
+class LevelDBSlice {
+ public:
+  LevelDBSlice(const char* begin, const char* end) : begin_(begin), end_(end) {
+    DCHECK(end_ >= begin_);
+  }
+
+  explicit LevelDBSlice(const std::vector<char>& v)
+      : begin_(v.data()), end_(begin_ + v.size()) {
+    DCHECK(end_ >= begin_);
+  }
+
+  ~LevelDBSlice() {}
+
+  const char* begin() const { return begin_; }
+  const char* end() const { return end_; }
+
+ private:
+  const char* begin_;
+  const char* end_;
+};
+
+}  // namespace content
+
+#endif  // CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_SLICE_H_