Revert "Migrate the IndexedDB backend from Blink to Chromium"

content/browser/indexed_db/leveldb/leveldb_write_batch.cc

-// 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.
-
-#include "content/browser/indexed_db/leveldb/leveldb_write_batch.h"
-
-#include "content/browser/indexed_db/leveldb/leveldb_slice.h"
-#include "third_party/leveldatabase/src/include/leveldb/slice.h"
-#include "third_party/leveldatabase/src/include/leveldb/write_batch.h"
-
-namespace content {
-
-scoped_ptr<LevelDBWriteBatch> LevelDBWriteBatch::Create() {
-  return make_scoped_ptr(new LevelDBWriteBatch);
-}
-
-LevelDBWriteBatch::LevelDBWriteBatch()
-    : write_batch_(new leveldb::WriteBatch) {}
-
-LevelDBWriteBatch::~LevelDBWriteBatch() {}
-
-static leveldb::Slice MakeSlice(const LevelDBSlice& s) {
-  return leveldb::Slice(s.begin(), s.end() - s.begin());
-}
-
-void LevelDBWriteBatch::Put(const LevelDBSlice& key,
-                            const LevelDBSlice& value) {
-  write_batch_->Put(MakeSlice(key), MakeSlice(value));
-}
-
-void LevelDBWriteBatch::Remove(const LevelDBSlice& key) {
-  write_batch_->Delete(MakeSlice(key));
-}
-
-void LevelDBWriteBatch::Clear() { write_batch_->Clear(); }
-
-}  // namespace content