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

core/src/fxcodec/codec/fx_codec_jpx_opj.cpp

Index: core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
diff --git a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
index 21c1e441f0f4aa58cd930a1096ae1c6fde8fca8b..5819ec99c5cdb781aa334d2f3ee0d3784cbbc473 100644
--- a/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
+++ b/core/src/fxcodec/codec/fx_codec_jpx_opj.cpp
@@ -866,7 +866,7 @@ CCodec_JpxModule::~CCodec_JpxModule() {
 CJPX_Decoder* CCodec_JpxModule::CreateDecoder(const uint8_t* src_buf,
                                               FX_DWORD src_size,
                                               bool use_colorspace) {
-  nonstd::unique_ptr<CJPX_Decoder> decoder(new CJPX_Decoder(use_colorspace));
+  std::unique_ptr<CJPX_Decoder> decoder(new CJPX_Decoder(use_colorspace));
   return decoder->Init(src_buf, src_size) ? decoder.release() : nullptr;
 }