Use string pools in some dictionaries

core/fpdfapi/fpdf_parser/cpdf_stream.cpp

 // 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
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_dictionary.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream_acc.h"
@@ skipping 75 matching lines @@
   return new CPDF_Stream(acc.DetachData(), streamSize, pDict);
 }
 
 void CPDF_Stream::SetData(const uint8_t* pData, uint32_t size) {
   m_bMemoryBased = true;
   m_pDataBuf.reset(FX_Alloc(uint8_t, size));
   if (pData)
     FXSYS_memcpy(m_pDataBuf.get(), pData, size);
   m_dwSize = size;
   if (!m_pDict)
-    m_pDict.reset(new CPDF_Dictionary);
+    m_pDict.reset(new CPDF_Dictionary(CFX_WeakPtr<CFX_ByteStringPool>()));
   m_pDict->SetIntegerFor("Length", size);
   m_pDict->RemoveFor("Filter");
   m_pDict->RemoveFor("DecodeParms");
 }
 
 FX_BOOL CPDF_Stream::ReadRawData(FX_FILESIZE offset,
                                  uint8_t* buf,
                                  uint32_t size) const {
   if (m_bMemoryBased && m_pFile)
     return m_pFile->ReadBlock(buf, offset, size);
 
   if (m_pDataBuf)
     FXSYS_memcpy(buf, m_pDataBuf.get() + offset, size);
 
   return TRUE;
 }
 
 CFX_WideString CPDF_Stream::GetUnicodeText() const {
   CPDF_StreamAcc stream;
   stream.LoadAllData(this, FALSE);
   return PDF_DecodeText(stream.GetData(), stream.GetSize());
 }