IndexedDB: Switch key/value handling from vector<char> to std::string

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 "base/strings/string_piece.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) {
+static leveldb::Slice MakeSlice(const base::StringPiece& s) {
   return leveldb::Slice(s.begin(), s.end() - s.begin());
 }
 
-void LevelDBWriteBatch::Put(const LevelDBSlice& key,
-                            const LevelDBSlice& value) {
+void LevelDBWriteBatch::Put(const base::StringPiece& key,
+                            const base::StringPiece& value) {
   write_batch_->Put(MakeSlice(key), MakeSlice(value));
 }
 
-void LevelDBWriteBatch::Remove(const LevelDBSlice& key) {
+void LevelDBWriteBatch::Remove(const base::StringPiece& key) {
   write_batch_->Delete(MakeSlice(key));
 }
 
 void LevelDBWriteBatch::Clear() { write_batch_->Clear(); }
 
 }  // namespace content