Replace some calls to Release() with direct delete, part 1.

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 "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 94 matching lines @@
     delete this;
   }
   return dwRefCount;
 }
 int32_t CFDE_CSSStyleSheet::CountRules() const {
   return m_RuleArray.GetSize();
 }
 IFDE_CSSRule* CFDE_CSSStyleSheet::GetRule(int32_t index) {
   return m_RuleArray.GetAt(index);
 }
+
 FX_BOOL CFDE_CSSStyleSheet::LoadFromStream(const CFX_WideString& szUrl,
                                            IFX_Stream* pStream,
                                            uint16_t wCodePage) {
-  CFDE_CSSSyntaxParser* pSyntax = new CFDE_CSSSyntaxParser;
-  if (pStream->GetCodePage() != wCodePage) {
+  std::unique_ptr<CFDE_CSSSyntaxParser> pSyntax(new CFDE_CSSSyntaxParser);
+  if (pStream->GetCodePage() != wCodePage)
     pStream->SetCodePage(wCodePage);
-  }
-  FX_BOOL bRet = pSyntax->Init(pStream, 4096) && LoadFromSyntax(pSyntax);
-  pSyntax->Release();
+
+  FX_BOOL bRet = pSyntax->Init(pStream, 4096) && LoadFromSyntax(pSyntax.get());
   m_wCodePage = wCodePage;
   m_szUrl = szUrl;
   return bRet;
 }
+
 FX_BOOL CFDE_CSSStyleSheet::LoadFromBuffer(const CFX_WideString& szUrl,
                                            const FX_WCHAR* pBuffer,
                                            int32_t iBufSize,
                                            uint16_t wCodePage) {
   ASSERT(pBuffer && iBufSize > 0);
-
-  CFDE_CSSSyntaxParser* pSyntax = new CFDE_CSSSyntaxParser;
-  FX_BOOL bRet = pSyntax->Init(pBuffer, iBufSize) && LoadFromSyntax(pSyntax);
-  pSyntax->Release();
+  std::unique_ptr<CFDE_CSSSyntaxParser> pSyntax(new CFDE_CSSSyntaxParser);
+  FX_BOOL bRet =
+      pSyntax->Init(pBuffer, iBufSize) && LoadFromSyntax(pSyntax.get());
   m_wCodePage = wCodePage;
   m_szUrl = szUrl;
   return bRet;
 }
+
 FX_BOOL CFDE_CSSStyleSheet::LoadFromSyntax(CFDE_CSSSyntaxParser* pSyntax) {
   Reset();
   m_pAllocator = IFX_MemoryAllocator::Create(FX_ALLOCTYPE_Static, 1024, 0);
   FDE_CSSSYNTAXSTATUS eStatus;
   do {
     switch (eStatus = pSyntax->DoSyntaxParse()) {
       case FDE_CSSSYNTAXSTATUS_StyleRule:
         eStatus = LoadStyleRule(pSyntax, m_RuleArray);
         break;
       case FDE_CSSSYNTAXSTATUS_MediaRule:
@@ skipping 334 matching lines @@
       return NULL;
     }
   }
   if (pPersudoFirst == NULL) {
     return pFirst;
   } else {
     pPersudoLast->SetNext(pFirst);
     return pPersudoFirst;
   }
 }