Convert loose FX_Create* functions into static methods

fpdfsdk/fpdfsave.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 "public/fpdf_save.h"
 
 #include <memory>
 #include <utility>
@@ skipping 118 matching lines @@
   std::unique_ptr<CXFA_ChecksumContext> pChecksum(new CXFA_ChecksumContext);
   pChecksum->StartChecksum();
 
   // template
   if (iTemplate > -1) {
     CPDF_Stream* pTemplateStream = pArray->GetStreamAt(iTemplate);
     CPDF_StreamAcc streamAcc;
     streamAcc.LoadAllData(pTemplateStream);
     uint8_t* pData = (uint8_t*)streamAcc.GetData();
     uint32_t dwSize2 = streamAcc.GetSize();
-    ScopedFileStream pTemplate(FX_CreateMemoryStream(pData, dwSize2));
+    ScopedFileStream pTemplate(IFX_MemoryStream::Create(pData, dwSize2));
     pChecksum->UpdateChecksum(pTemplate.get());
   }
   CPDF_Stream* pFormStream = nullptr;
   CPDF_Stream* pDataSetsStream = nullptr;
   if (iFormIndex != -1) {
     // Get form CPDF_Stream
     CPDF_Object* pFormPDFObj = pArray->GetObjectAt(iFormIndex);
     if (pFormPDFObj->IsReference()) {
       CPDF_Object* pFormDirectObj = pFormPDFObj->GetDirect();
       if (pFormDirectObj && pFormDirectObj->IsStream()) {
@@ skipping 12 matching lines @@
       CPDF_Object* pDataSetsDirectObj = pDataSetsRefObj->GetDirect();
       if (pDataSetsDirectObj && pDataSetsDirectObj->IsStream()) {
         pDataSetsStream = (CPDF_Stream*)pDataSetsDirectObj;
       }
     } else if (pDataSetsPDFObj->IsStream()) {
       pDataSetsStream = (CPDF_Stream*)pDataSetsPDFObj;
     }
   }
   // L"datasets"
   {
-    ScopedFileStream pDsfileWrite(FX_CreateMemoryStream());
+    ScopedFileStream pDsfileWrite(IFX_MemoryStream::Create());
     if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Datasets,
                                            pDsfileWrite.get(), nullptr) &&
         pDsfileWrite->GetSize() > 0) {
       // Datasets
       pChecksum->UpdateChecksum(pDsfileWrite.get());
       pChecksum->FinishChecksum();
       auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>(
           pPDFDocument->GetByteStringPool());
       if (iDataSetsIndex != -1) {
         if (pDataSetsStream) {
           pDataSetsStream->InitStreamFromFile(pDsfileWrite.get(),
                                               std::move(pDataDict));
         }
       } else {
         CPDF_Stream* pData = pPDFDocument->NewIndirect<CPDF_Stream>();
         pData->InitStreamFromFile(pDsfileWrite.get(), std::move(pDataDict));
         iLast = pArray->GetCount() - 2;
         pArray->InsertNewAt<CPDF_String>(iLast, "datasets", false);
         pArray->InsertNewAt<CPDF_Reference>(iLast + 1, pPDFDocument,
                                             pData->GetObjNum());
       }
       fileList->push_back(std::move(pDsfileWrite));
     }
   }
   // L"form"
   {
-    ScopedFileStream pfileWrite(FX_CreateMemoryStream());
+    ScopedFileStream pfileWrite(IFX_MemoryStream::Create());
     if (pXFADocView->GetDoc()->SavePackage(XFA_HASHCODE_Form, pfileWrite.get(),
                                            pChecksum.get()) &&
         pfileWrite->GetSize() > 0) {
       auto pDataDict = pdfium::MakeUnique<CPDF_Dictionary>(
           pPDFDocument->GetByteStringPool());
       if (iFormIndex != -1) {
         if (pFormStream) {
           pFormStream->InitStreamFromFile(pfileWrite.get(),
                                           std::move(pDataDict));
         }
@@ skipping 102 matching lines @@
                                             FPDF_DWORD flags) {
   return FPDF_Doc_Save(document, pFileWrite, flags, false, 0);
 }
 
 DLLEXPORT FPDF_BOOL STDCALL FPDF_SaveWithVersion(FPDF_DOCUMENT document,
                                                  FPDF_FILEWRITE* pFileWrite,
                                                  FPDF_DWORD flags,
                                                  int fileVersion) {
   return FPDF_Doc_Save(document, pFileWrite, flags, true, fileVersion);
 }