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

content/browser/indexed_db/leveldb/leveldb_write_batch.h

Index: content/browser/indexed_db/leveldb/leveldb_write_batch.h
diff --git a/content/browser/indexed_db/leveldb/leveldb_write_batch.h b/content/browser/indexed_db/leveldb/leveldb_write_batch.h
index 2849687c915cc23a5fb0b03f8a706d91b09199a6..3fbd103dd4cc0a17bb7ae06fa67243725ce8d7e8 100644
--- a/content/browser/indexed_db/leveldb/leveldb_write_batch.h
+++ b/content/browser/indexed_db/leveldb/leveldb_write_batch.h
@@ -6,6 +6,7 @@
 #define CONTENT_BROWSER_INDEXED_DB_LEVELDB_LEVELDB_WRITE_BATCH_H_
 
 #include "base/memory/scoped_ptr.h"
+#include "base/strings/string_piece.h"
 
 namespace leveldb {
 class WriteBatch;
@@ -13,8 +14,6 @@ class WriteBatch;
 
 namespace content {
 
-class LevelDBSlice;
-
 // Wrapper around leveldb::WriteBatch.
 // This class holds a collection of updates to apply atomically to a database.
 class LevelDBWriteBatch {
@@ -22,8 +21,9 @@ class LevelDBWriteBatch {
   static scoped_ptr<LevelDBWriteBatch> Create();
   ~LevelDBWriteBatch();
 
-  void Put(const LevelDBSlice& key, const LevelDBSlice& value);
-  void Remove(const LevelDBSlice& key);  // Add remove operation to the batch.
+  void Put(const base::StringPiece& key, const base::StringPiece& value);
+  void Remove(const base::StringPiece& key);  // Add remove operation to the
+                                              // batch.
   void Clear();
 
  private: