Remove ICodec_* Interfaces.

core/fxcodec/codec/fx_codec.cpp

 // Copyright 2014 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
 
 #include "core/fxcodec/include/fx_codec.h"
 
 #include <cmath>
+#include <memory>
 #include <utility>
 
 #include "core/fxcodec/codec/codec_int.h"
 #include "core/fxcrt/include/fx_ext.h"
 #include "core/fxcrt/include/fx_safe_types.h"
 #include "third_party/base/logging.h"
 
 CCodec_ModuleMgr::CCodec_ModuleMgr()
     : m_pBasicModule(new CCodec_BasicModule),
       m_pFaxModule(new CCodec_FaxModule),
@@ skipping 370 matching lines @@
   uint8_t count = 257 - m_Operator;
   FXSYS_assert((uint32_t)count >= used_bytes);
   if (used_bytes == count) {
     m_SrcOffset++;
     GetNextOperator();
     return;
   }
   count -= used_bytes;
   m_Operator = 257 - count;
 }
-ICodec_ScanlineDecoder* CCodec_BasicModule::CreateRunLengthDecoder(
+
+CCodec_ScanlineDecoder* CCodec_BasicModule::CreateRunLengthDecoder(
     const uint8_t* src_buf,
     uint32_t src_size,
     int width,
     int height,
     int nComps,
     int bpc) {
-  CCodec_RLScanlineDecoder* pRLScanlineDecoder = new CCodec_RLScanlineDecoder;
+  std::unique_ptr<CCodec_RLScanlineDecoder> pRLScanlineDecoder(
+      new CCodec_RLScanlineDecoder);
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
-    delete pRLScanlineDecoder;
-    return NULL;
+    return nullptr;
   }
-  return pRLScanlineDecoder;
+
+  return pRLScanlineDecoder.release();
 }