IndexedDB: WrapUnique(new T(args..)) -> MakeUnique<T>(args...)

content/browser/indexed_db/indexed_db_backing_store.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_INDEXED_DB_BACKING_STORE_H_
 #define CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_BACKING_STORE_H_
 
 #include <stddef.h>
 #include <stdint.h>
 
@@ skipping 297 matching lines @@
                   leveldb::Status* s) {
       return Continue(key, NULL, state, s);
     }
     bool Continue(const IndexedDBKey* key,
                   const IndexedDBKey* primary_key,
                   IteratorState state,
                   leveldb::Status*);
     bool Advance(uint32_t count, leveldb::Status*);
     bool FirstSeek(leveldb::Status*);
 
-    virtual Cursor* Clone() = 0;
+    virtual std::unique_ptr<Cursor> Clone() const = 0;
     virtual const IndexedDBKey& primary_key() const;
     virtual IndexedDBValue* value() = 0;
     virtual const RecordIdentifier& record_identifier() const;
     virtual bool LoadCurrentRow(leveldb::Status* s) = 0;
 
    protected:
     Cursor(scoped_refptr<IndexedDBBackingStore> backing_store,
            Transaction* transaction,
            int64_t database_id,
            const CursorOptions& cursor_options);
@@ skipping 337 matching lines @@
   // complete. While > 0, temporary journal entries may exist so out-of-band
   // journal cleaning must be deferred.
   size_t committing_transaction_count_;
 
   DISALLOW_COPY_AND_ASSIGN(IndexedDBBackingStore);
 };
 
 }  // namespace content
 
 #endif  // CONTENT_BROWSER_INDEXED_DB_INDEXED_DB_BACKING_STORE_H_