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

fpdfsdk/src/javascript/Field.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 "Field.h"
 
 #include "Document.h"
 #include "Icon.h"
@@ skipping 3123 matching lines @@
   for (CPDF_FormField* pFormField : FieldArray)
     swSort.Add(new CFX_WideString(pFormField->GetFullName()));
   swSort.Sort(JS_COMPARESTRING);
 
   CJS_Context* pContext = (CJS_Context*)cc;
   CJS_Runtime* pRuntime = pContext->GetJSRuntime();
   ASSERT(pRuntime);
 
   CJS_Array FormFieldArray(pRuntime);
   for (int j = 0, jsz = swSort.GetSize(); j < jsz; j++) {
-    nonstd::unique_ptr<CFX_WideString> pStr(swSort.GetAt(j));
+    std::unique_ptr<CFX_WideString> pStr(swSort.GetAt(j));
     v8::Local<v8::Object> pObj = FXJS_NewFxDynamicObj(
         pRuntime->GetIsolate(), pRuntime, CJS_Field::g_nObjDefnID);
     ASSERT(!pObj.IsEmpty());
 
     CJS_Field* pJSField =
         (CJS_Field*)FXJS_GetPrivate(pRuntime->GetIsolate(), pObj);
     Field* pField = (Field*)pJSField->GetEmbedObject();
     pField->AttachField(m_pJSDoc, *pStr);
 
     CJS_Value FormFieldValue(pRuntime);
@@ skipping 465 matching lines @@
   }
 }
 
 void Field::AddField(CPDFSDK_Document* pDocument,
                      int nPageIndex,
                      int nFieldType,
                      const CFX_WideString& sName,
                      const CPDF_Rect& rcCoords) {
   // Not supported.
 }