Return unique_ptr<>s from fxcodec/

core/fxcodec/codec/ccodec_basicmodule.h

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #ifndef CORE_FXCODEC_CODEC_CCODEC_BASICMODULE_H_
 #define CORE_FXCODEC_CODEC_CCODEC_BASICMODULE_H_
 
+#include <memory>
+
 #include "core/fxcrt/fx_system.h"
 
 class CCodec_ScanlineDecoder;
 
 class CCodec_BasicModule {
  public:
-  CCodec_ScanlineDecoder* CreateRunLengthDecoder(const uint8_t* src_buf,
-                                                 uint32_t src_size,
-                                                 int width,
-                                                 int height,
-                                                 int nComps,
-                                                 int bpc);
+  std::unique_ptr<CCodec_ScanlineDecoder> CreateRunLengthDecoder(
+      const uint8_t* src_buf,
+      uint32_t src_size,
+      int width,
+      int height,
+      int nComps,
+      int bpc);
 };
 
 #endif  // CORE_FXCODEC_CODEC_CCODEC_BASICMODULE_H_