Make more concrete stream classes private to .cpp files

fpdfsdk/fpdfeditimg.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_edit.h"
 
 #include "core/fpdfapi/cpdf_modulemgr.h"
 #include "core/fpdfapi/page/cpdf_image.h"
@@ skipping 14 matching lines @@
 }
 
 DLLEXPORT FPDF_BOOL STDCALL
 FPDFImageObj_LoadJpegFile(FPDF_PAGE* pages,
                           int nCount,
                           FPDF_PAGEOBJECT image_object,
                           FPDF_FILEACCESS* fileAccess) {
   if (!image_object || !fileAccess || !pages)
     return false;
 
-  IFX_SeekableReadStream* pFile = new CPDF_CustomAccess(fileAccess);
+  IFX_SeekableReadStream* pFile = MakeSeekableReadStream(fileAccess);
   CPDF_ImageObject* pImgObj = reinterpret_cast<CPDF_ImageObject*>(image_object);
   for (int index = 0; index < nCount; index++) {
     CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]);
     if (pPage)
       pImgObj->GetImage()->ResetCache(pPage, nullptr);
   }
   pImgObj->GetImage()->SetJpegImage(pFile);
 
   return true;
 }
@@ skipping 27 matching lines @@
   CPDF_ImageObject* pImgObj = reinterpret_cast<CPDF_ImageObject*>(image_object);
   for (int index = 0; index < nCount; index++) {
     CPDF_Page* pPage = CPDFPageFromFPDFPage(pages[index]);
     if (pPage)
       pImgObj->GetImage()->ResetCache(pPage, nullptr);
   }
   pImgObj->GetImage()->SetImage(reinterpret_cast<CFX_DIBitmap*>(bitmap));
   pImgObj->CalcBoundingBox();
   return true;
 }