Track CFDE_CSSComputedStyle with retained ptrs

Remove the bare new and use CFX_RetainPtr to keep track of the computed styles.

Change-Id: Icf235623529797176707482c78676814b7a81b9e
Reviewed-on: https://pdfium-review.googlesource.com/2292
Reviewed-by: Tom Sepez <tsepez@chromium.org>
Commit-Queue: dsinclair <dsinclair@chromium.org>

4 files changed, 12 insertions, 24 deletions

diff --git a/xfa/fde/css/cfde_csscomputedstyle.cpp b/xfa/fde/css/cfde_csscomputedstyle.cpp
index 010f573c04..b563bbf445 100644
--- a/xfa/fde/css/cfde_csscomputedstyle.cpp
+++ b/xfa/fde/css/cfde_csscomputedstyle.cpp
@@ -10,21 +10,10 @@
 #include "xfa/fde/css/cfde_cssstringvalue.h"
 #include "xfa/fde/css/cfde_cssvaluelist.h"
 
-CFDE_CSSComputedStyle::CFDE_CSSComputedStyle() : m_dwRefCount(1) {}
+CFDE_CSSComputedStyle::CFDE_CSSComputedStyle() {}
 
 CFDE_CSSComputedStyle::~CFDE_CSSComputedStyle() {}
 
-uint32_t CFDE_CSSComputedStyle::Retain() {
-  return ++m_dwRefCount;
-}
-
-uint32_t CFDE_CSSComputedStyle::Release() {
-  uint32_t dwRefCount = --m_dwRefCount;
-  if (dwRefCount == 0)
-    delete this;
-  return dwRefCount;
-}
-
 bool CFDE_CSSComputedStyle::GetCustomStyle(const CFX_WideStringC& wsName,
                                            CFX_WideString& wsValue) const {
   for (int32_t i = pdfium::CollectionSize<int32_t>(m_CustomProperties) - 2;
diff --git a/xfa/fde/css/cfde_csscomputedstyle.h b/xfa/fde/css/cfde_csscomputedstyle.h
index 73eb996f0d..1f73d87631 100644
--- a/xfa/fde/css/cfde_csscomputedstyle.h
+++ b/xfa/fde/css/cfde_csscomputedstyle.h
@@ -15,7 +15,7 @@
 
 class CFDE_CSSValueList;
 
-class CFDE_CSSComputedStyle : public IFX_Retainable {
+class CFDE_CSSComputedStyle : public CFX_Retainable {
  public:
   class InheritedData {
    public:
@@ -54,13 +54,6 @@ class CFDE_CSSComputedStyle : public IFX_Retainable {
     bool m_bHasPadding;
   };
 
-  CFDE_CSSComputedStyle();
-  ~CFDE_CSSComputedStyle() override;
-
-  // IFX_Retainable
-  uint32_t Retain() override;
-  uint32_t Release() override;
-
   int32_t CountFontFamilies() const;
   const CFX_WideString GetFontFamily(int32_t index) const;
   uint16_t GetFontWeight() const;
@@ -105,7 +98,12 @@ class CFDE_CSSComputedStyle : public IFX_Retainable {
   NonInheritedData m_NonInheritedData;
 
  private:
-  uint32_t m_dwRefCount;
+  template <typename T, typename... Args>
+  friend CFX_RetainPtr<T> pdfium::MakeRetain(Args&&... args);
+
+  CFDE_CSSComputedStyle();
+  ~CFDE_CSSComputedStyle() override;
+
   std::vector<CFX_WideString> m_CustomProperties;
 };
 
diff --git a/xfa/fde/css/cfde_cssstyleselector.cpp b/xfa/fde/css/cfde_cssstyleselector.cpp
index 63d8e0986b..1b4aa0e13b 100644
--- a/xfa/fde/css/cfde_cssstyleselector.cpp
+++ b/xfa/fde/css/cfde_cssstyleselector.cpp
@@ -55,9 +55,9 @@ CFDE_CSSAccelerator* CFDE_CSSStyleSelector::InitAccelerator() {
   return m_pAccelerator.get();
 }
 
-CFDE_CSSComputedStyle* CFDE_CSSStyleSelector::CreateComputedStyle(
+CFX_RetainPtr<CFDE_CSSComputedStyle> CFDE_CSSStyleSelector::CreateComputedStyle(
     CFDE_CSSComputedStyle* pParentStyle) {
-  CFDE_CSSComputedStyle* pStyle = new CFDE_CSSComputedStyle();
+  auto pStyle = pdfium::MakeRetain<CFDE_CSSComputedStyle>();
   if (pParentStyle)
     pStyle->m_InheritedData = pParentStyle->m_InheritedData;
   return pStyle;
@@ -77,6 +77,7 @@ int32_t CFDE_CSSStyleSelector::MatchDeclarations(
     CXFA_CSSTagProvider* pTag,
     CFX_ArrayTemplate<CFDE_CSSDeclaration*>& matchedDecls) {
   ASSERT(pTag);
+
   CFDE_CSSTagCache* pCache = m_pAccelerator->top();
   ASSERT(pCache && pCache->GetTag() == pTag);
 
diff --git a/xfa/fde/css/cfde_cssstyleselector.h b/xfa/fde/css/cfde_cssstyleselector.h
index 2b03d7e961..c2262d7aa7 100644
--- a/xfa/fde/css/cfde_cssstyleselector.h
+++ b/xfa/fde/css/cfde_cssstyleselector.h
@@ -37,7 +37,7 @@ class CFDE_CSSStyleSelector {
 
   void UpdateStyleIndex();
   CFDE_CSSAccelerator* InitAccelerator();
-  CFDE_CSSComputedStyle* CreateComputedStyle(
+  CFX_RetainPtr<CFDE_CSSComputedStyle> CreateComputedStyle(
       CFDE_CSSComputedStyle* pParentStyle);
   int32_t MatchDeclarations(
       CXFA_CSSTagProvider* pTag,