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

core/src/fpdfapi/fpdf_font/ttgsubtable.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 "ttgsubtable.h"
 
+#include <memory>
+
 #include "core/include/fxge/fx_freetype.h"
 #include "core/include/fxge/fx_ge.h"
-#include "third_party/base/nonstd_unique_ptr.h"
 #include "third_party/base/stl_util.h"
 
 CFX_GlyphMap::CFX_GlyphMap() {}
 CFX_GlyphMap::~CFX_GlyphMap() {}
 extern "C" {
 static int _CompareInt(const void* p1, const void* p2) {
   return (*(FX_DWORD*)p1) - (*(FX_DWORD*)p2);
 }
 };
 struct _IntPair {
@@ skipping 376 matching lines @@
       pFont->SetSubData(FX_Alloc(uint8_t, length));
     }
     if (!pFont->GetSubData()) {
       return NULL;
     }
   }
   int error =
       FXFT_Load_Sfnt_Table(pFont->GetFace(), FT_MAKE_TAG('G', 'S', 'U', 'B'), 0,
                            pFont->GetSubData(), NULL);
   if (!error && pFont->GetSubData()) {
-    nonstd::unique_ptr<CFX_GSUBTable> pGsubTable(new CFX_GSUBTable);
+    std::unique_ptr<CFX_GSUBTable> pGsubTable(new CFX_GSUBTable);
     if (pGsubTable->m_GsubImp.LoadGSUBTable((FT_Bytes)pFont->GetSubData())) {
       return pGsubTable.release();
     }
   }
   return NULL;
 }