CPDF_Parser shouldnt be in the business of opening files

core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.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 <utility>
 #include <vector>
 
 #include "../../../include/fpdfapi/fpdf_module.h"
@@ skipping 98 matching lines @@
     if (*(FX_DWORD*)buf == tag) {
       return offset;
     }
     offset++;
     if (offset > 1024) {
       return -1;
     }
   }
   return -1;
 }
-FX_DWORD CPDF_Parser::StartParse(const FX_CHAR* filename, FX_BOOL bReParse) {
-  IFX_FileRead* pFileAccess = FX_CreateFileRead(filename);
-  if (!pFileAccess) {
-    return PDFPARSE_ERROR_FILE;
-  }
-  return StartParse(pFileAccess, bReParse);
-}
-FX_DWORD CPDF_Parser::StartParse(const FX_WCHAR* filename, FX_BOOL bReParse) {
-  IFX_FileRead* pFileAccess = FX_CreateFileRead(filename);
-  if (!pFileAccess) {
-    return PDFPARSE_ERROR_FILE;
-  }
-  return StartParse(pFileAccess, bReParse);
-}
 CPDF_SecurityHandler* FPDF_CreateStandardSecurityHandler();
 CPDF_SecurityHandler* FPDF_CreatePubKeyHandler(void*);
 FX_DWORD CPDF_Parser::StartParse(IFX_FileRead* pFileAccess,
                                  FX_BOOL bReParse,
                                  FX_BOOL bOwnFileRead) {
   CloseParser(bReParse);
   m_bXRefStream = FALSE;
   m_LastXRefOffset = 0;
   m_bOwnFileRead = bOwnFileRead;
   int32_t offset = GetHeaderOffset(pFileAccess);
@@ skipping 4507 matching lines @@
   return FALSE;
 }
 CPDF_PageNode::~CPDF_PageNode() {
   int32_t iSize = m_childNode.GetSize();
   for (int32_t i = 0; i < iSize; ++i) {
     CPDF_PageNode* pNode = (CPDF_PageNode*)m_childNode[i];
     delete pNode;
   }
   m_childNode.RemoveAll();
 }