Rename IFX_Unknown to IFX_Retainable.

xfa/fde/css/fde_cssstylesheet.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_CSSSTYLESHEET_H_
 #define XFA_FDE_CSS_FDE_CSSSTYLESHEET_H_
 
 #include <unordered_map>
@@ skipping 80 matching lines @@
 };
 #define FDE_CSSSWITCHDEFAULTS()     \
   case FDE_CSSSYNTAXSTATUS_EOS:     \
     return FDE_CSSSYNTAXSTATUS_EOS; \
   case FDE_CSSSYNTAXSTATUS_Error:   \
   default:                          \
     return FDE_CSSSYNTAXSTATUS_Error;
 class CFDE_CSSStyleSheet : public IFDE_CSSStyleSheet, public CFX_Target {
  public:
   CFDE_CSSStyleSheet(uint32_t dwMediaList);
-  ~CFDE_CSSStyleSheet();
-  virtual uint32_t AddRef();
-  virtual uint32_t Release();
+  ~CFDE_CSSStyleSheet() override;
 
-  virtual FX_BOOL GetUrl(CFX_WideString& szUrl) {
+  // IFX_Retainable:
+  uint32_t Retain() override;
+  uint32_t Release() override;
+
+  // IFDE_CSSStyleSheet:
+  FX_BOOL GetUrl(CFX_WideString& szUrl) override {
     szUrl = m_szUrl;
     return szUrl.GetLength() > 0;
   }
-  virtual uint32_t GetMediaList() const { return m_dwMediaList; }
-  virtual uint16_t GetCodePage() const { return m_wCodePage; }
-  virtual int32_t CountRules() const;
-  virtual IFDE_CSSRule* GetRule(int32_t index);
+  uint32_t GetMediaList() const override { return m_dwMediaList; }
+  uint16_t GetCodePage() const override { return m_wCodePage; }
+  int32_t CountRules() const override;
+  IFDE_CSSRule* GetRule(int32_t index) override;
+
   FX_BOOL LoadFromStream(const CFX_WideString& szUrl,
                          IFX_Stream* pStream,
                          uint16_t wCodePage);
   FX_BOOL LoadFromBuffer(const CFX_WideString& szUrl,
                          const FX_WCHAR* pBuffer,
                          int32_t iBufSize,
                          uint16_t wCodePage);
 
  protected:
   void Reset();
@@ skipping 10 matching lines @@
   uint16_t m_wRefCount;
   uint32_t m_dwMediaList;
   IFX_MemoryAllocator* m_pAllocator;
   CFDE_CSSRuleArray m_RuleArray;
   CFX_WideString m_szUrl;
   CFDE_CSSSelectorArray m_Selectors;
   std::unordered_map<uint32_t, FX_WCHAR*> m_StringCache;
 };
 
 #endif  // XFA_FDE_CSS_FDE_CSSSTYLESHEET_H_