Refcount IFGAS_ streams all the time, too

xfa/fde/css/fde_csssyntax.h

 // 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
 
 #ifndef XFA_FDE_CSS_FDE_CSSSYNTAX_H_
 #define XFA_FDE_CSS_FDE_CSSSYNTAX_H_
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "xfa/fde/css/fde_css.h"
 #include "xfa/fgas/crt/fgas_memory.h"
 #include "xfa/fgas/crt/fgas_stream.h"
 
 class CFDE_CSSTextBuf : public CFX_Target {
  public:
   CFDE_CSSTextBuf();
   ~CFDE_CSSTextBuf() override;
 
   bool AttachBuffer(const FX_WCHAR* pBuffer, int32_t iBufLen);
   bool EstimateSize(int32_t iAllocSize);
-  int32_t LoadFromStream(IFGAS_Stream* pTxtStream,
+  int32_t LoadFromStream(const CFX_RetainPtr<IFGAS_Stream>& pTxtStream,
                          int32_t iStreamOffset,
                          int32_t iMaxChars,
                          bool& bEOS);
   bool AppendChar(FX_WCHAR wch) {
     if (m_iDatLen >= m_iBufLen && !ExpandBuf(m_iBufLen * 2))
       return false;
     m_pBuffer[m_iDatLen++] = wch;
     return true;
   }
   void Clear() { m_iDatPos = m_iDatLen = 0; }
@@ skipping 41 matching lines @@
   FDE_CSSSYNTAXMODE_Selector,
   FDE_CSSSYNTAXMODE_PropertyName,
   FDE_CSSSYNTAXMODE_PropertyValue,
 };
 
 class CFDE_CSSSyntaxParser : public CFX_Target {
  public:
   CFDE_CSSSyntaxParser();
   ~CFDE_CSSSyntaxParser() override;
 
-  bool Init(IFGAS_Stream* pStream,
+  bool Init(const CFX_RetainPtr<IFGAS_Stream>& pStream,
             int32_t iCSSPlaneSize,
             int32_t iTextDataSize = 32,
             bool bOnlyDeclaration = false);
   bool Init(const FX_WCHAR* pBuffer,
             int32_t iBufferSize,
             int32_t iTextDatSize = 32,
             bool bOnlyDeclaration = false);
   FDE_CSSSYNTAXSTATUS DoSyntaxParse();
   const FX_WCHAR* GetCurrentString(int32_t& iLength) const;
 
  protected:
   void Reset(bool bOnlyDeclaration);
   void SwitchMode(FDE_CSSSYNTAXMODE eMode);
   int32_t SwitchToComment();
 
   bool RestoreMode();
   bool AppendChar(FX_WCHAR wch);
   int32_t SaveTextData();
   bool IsCharsetEnabled() const {
     return (m_dwCheck & FDE_CSSSYNTAXCHECK_AllowCharset) != 0;
   }
   void DisableCharset() { m_dwCheck = FDE_CSSSYNTAXCHECK_AllowImport; }
   bool IsImportEnabled() const;
   void DisableImport() { m_dwCheck = 0; }
 
-  IFGAS_Stream* m_pStream;
+  CFX_RetainPtr<IFGAS_Stream> m_pStream;
   int32_t m_iStreamPos;
   int32_t m_iPlaneSize;
   CFDE_CSSTextBuf m_TextData;
   CFDE_CSSTextBuf m_TextPlane;
   int32_t m_iTextDatLen;
   uint32_t m_dwCheck;
   FDE_CSSSYNTAXMODE m_eMode;
   FDE_CSSSYNTAXSTATUS m_eStatus;
   CFX_StackTemplate<FDE_CSSSYNTAXMODE> m_ModeStack;
 };
 
 #endif  // XFA_FDE_CSS_FDE_CSSSYNTAX_H_