Refcount IFGAS_ streams all the time, too

xfa/fde/css/fde_cssstylesheet.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 "xfa/fde/css/fde_cssstylesheet.h"
 
 #include <memory>
 
+#include "third_party/base/ptr_util.h"
 #include "xfa/fde/css/fde_cssdatatable.h"
 #include "xfa/fde/css/fde_csssyntax.h"
 #include "xfa/fgas/crt/fgas_codepage.h"
 
 IFDE_CSSStyleSheet* IFDE_CSSStyleSheet::LoadHTMLStandardStyleSheet() {
   static const FX_WCHAR s_pStyle[] =
       L"html,address,blockquote,body,dd,div,dl,dt,fieldset,form,frame,frameset,"
       L"h1,h2,h3,h4,h5,h6,noframes,ol,p,ul,center,dir,hr,menu,pre{display:"
       L"block}"
       L"li{display:list-item}head{display:none}table{display:table}tr{display:"
@@ skipping 21 matching lines @@
       L"ruby{display:ruby}rt{display:ruby-text;font-size:.5em}rb{display:ruby-"
       L"base}rbc{display:ruby-base-group}rtc{display:ruby-text-group}"
       L"q:before{content:open-quote}q:after{content:close-quote}"
       L"rp{display:none}";
   return IFDE_CSSStyleSheet::LoadFromBuffer(
       CFX_WideString(), s_pStyle, FXSYS_wcslen(s_pStyle), FX_CODEPAGE_UTF8);
 }
 
 IFDE_CSSStyleSheet* IFDE_CSSStyleSheet::LoadFromStream(
     const CFX_WideString& szUrl,
-    IFGAS_Stream* pStream,
+    const CFX_RetainPtr<IFGAS_Stream>& pStream,
     uint16_t wCodePage,
     uint32_t dwMediaList) {
   CFDE_CSSStyleSheet* pStyleSheet = new CFDE_CSSStyleSheet(dwMediaList);
   if (!pStyleSheet->LoadFromStream(szUrl, pStream, wCodePage)) {
     pStyleSheet->Release();
     pStyleSheet = nullptr;
   }
   return pStyleSheet;
 }
 
@@ skipping 73 matching lines @@
 }
 
 int32_t CFDE_CSSStyleSheet::CountRules() const {
   return m_RuleArray.GetSize();
 }
 
 IFDE_CSSRule* CFDE_CSSStyleSheet::GetRule(int32_t index) {
   return m_RuleArray.GetAt(index);
 }
 
-bool CFDE_CSSStyleSheet::LoadFromStream(const CFX_WideString& szUrl,
-                                        IFGAS_Stream* pStream,
-                                        uint16_t wCodePage) {
-  std::unique_ptr<CFDE_CSSSyntaxParser> pSyntax(new CFDE_CSSSyntaxParser);
+bool CFDE_CSSStyleSheet::LoadFromStream(
+    const CFX_WideString& szUrl,
+    const CFX_RetainPtr<IFGAS_Stream>& pStream,
+    uint16_t wCodePage) {
+  auto pSyntax = pdfium::MakeUnique<CFDE_CSSSyntaxParser>();
   if (pStream->GetCodePage() != wCodePage)
     pStream->SetCodePage(wCodePage);
 
   bool bRet = pSyntax->Init(pStream, 4096) && LoadFromSyntax(pSyntax.get());
   m_wCodePage = wCodePage;
   m_szUrl = szUrl;
   return bRet;
 }
 
 bool CFDE_CSSStyleSheet::LoadFromBuffer(const CFX_WideString& szUrl,
@@ skipping 417 matching lines @@
   if (!pPersudoFirst)
     return pFirst;
 
   pPersudoLast->SetNext(pFirst);
   return pPersudoFirst;
 }
 
 CFDE_CSSDeclaration* CFDE_CSSFontFaceRule::GetDeclaration() {
   return &m_Declaration;
 }