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

core/src/fxcodec/codec/fx_codec_jpx_opj.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 <algorithm>
 #include <limits>
 #include <vector>
 
@@ skipping 847 matching lines @@
   return true;
 }
 
 CCodec_JpxModule::CCodec_JpxModule() {}
 CCodec_JpxModule::~CCodec_JpxModule() {
 }
 
 CJPX_Decoder* CCodec_JpxModule::CreateDecoder(const uint8_t* src_buf,
                                               FX_DWORD src_size,
                                               CPDF_ColorSpace* cs) {
-  nonstd::unique_ptr<CJPX_Decoder> decoder(new CJPX_Decoder(cs));
+  std::unique_ptr<CJPX_Decoder> decoder(new CJPX_Decoder(cs));
   return decoder->Init(src_buf, src_size) ? decoder.release() : nullptr;
 }
 
 void CCodec_JpxModule::GetImageInfo(CJPX_Decoder* pDecoder,
                                     FX_DWORD* width,
                                     FX_DWORD* height,
                                     FX_DWORD* components) {
   pDecoder->GetInfo(width, height, components);
 }
 
 bool CCodec_JpxModule::Decode(CJPX_Decoder* pDecoder,
                               uint8_t* dest_data,
                               int pitch,
                               const std::vector<uint8_t>& offsets) {
   return pDecoder->Decode(dest_data, pitch, offsets);
 }
 
 void CCodec_JpxModule::DestroyDecoder(CJPX_Decoder* pDecoder) {
   delete pDecoder;
 }