Make CPDF_Object subclass constructors intern strings

core/fpdfapi/parser/cpdf_syntax_parser.h

 // Copyright 2016 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
 
 #ifndef CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_
 #define CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_
 
 #include <memory>
@@ skipping 61 matching lines @@
                    const CFX_ByteStringC& tag,
                    bool checkKeyword);
 
   CFX_ByteString ReadString();
   CFX_ByteString ReadHexString();
   unsigned int ReadEOLMarkers(FX_FILESIZE pos);
   std::unique_ptr<CPDF_Stream> ReadStream(CPDF_Dictionary* pDict,
                                           uint32_t objnum,
                                           uint32_t gennum);
 
-  CFX_ByteString MaybeIntern(const CFX_ByteString& str);
   inline bool CheckPosition(FX_FILESIZE pos) {
     return m_BufOffset >= pos ||
            static_cast<FX_FILESIZE>(m_BufOffset + m_BufSize) <= pos;
   }
 
   FX_FILESIZE m_Pos;
   uint32_t m_MetadataObjnum;
   IFX_SeekableReadStream* m_pFileAccess;
   FX_FILESIZE m_HeaderOffset;
   FX_FILESIZE m_FileLen;
   uint8_t* m_pFileBuf;
   uint32_t m_BufSize;
   FX_FILESIZE m_BufOffset;
   std::unique_ptr<CPDF_CryptoHandler> m_pCryptoHandler;
   uint8_t m_WordBuffer[257];
   uint32_t m_WordSize;
   CFX_WeakPtr<CFX_ByteStringPool> m_pPool;
 };
 
 #endif  // CORE_FPDFAPI_PARSER_CPDF_SYNTAX_PARSER_H_