Switch from nonstd::unique_ptr to std::unique_ptr.

core/src/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/include/fxcodec/fx_codec.h"
 
 #include <cmath>
 #include <utility>
@@ skipping 116 matching lines @@
 void CCodec_ScanlineDecoder::DownScale(int dest_width, int dest_height) {
   dest_width = std::abs(dest_width);
   dest_height = std::abs(dest_height);
   v_DownScale(dest_width, dest_height);
 
   if (m_pDataCache &&
       m_pDataCache->IsSameDimensions(m_OutputWidth, m_OutputHeight)) {
     return;
   }
 
-  nonstd::unique_ptr<ImageDataCache> cache(
+  std::unique_ptr<ImageDataCache> cache(
       new ImageDataCache(m_OutputWidth, m_OutputHeight, m_Pitch));
   if (!cache->AllocateCache())
     return;
 
   m_pDataCache = std::move(cache);
 }
 
 FX_BOOL CCodec_BasicModule::RunLengthEncode(const uint8_t* src_buf,
                                             FX_DWORD src_size,
                                             uint8_t*& dest_buf,
@@ skipping 306 matching lines @@
     int nComps,
     int bpc) {
   CCodec_RLScanlineDecoder* pRLScanlineDecoder = new CCodec_RLScanlineDecoder;
   if (!pRLScanlineDecoder->Create(src_buf, src_size, width, height, nComps,
                                   bpc)) {
     delete pRLScanlineDecoder;
     return NULL;
   }
   return pRLScanlineDecoder;
 }