Rename IFX_Unknown to IFX_Retainable.

xfa/fde/css/fde_cssstyleselector.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_CSSSTYLESELECTOR_H_
 #define XFA_FDE_CSS_FDE_CSSSTYLESELECTOR_H_
 
 #include <vector>
@@ skipping 370 matching lines @@
 class CFDE_CSSComputedStyle : public IFDE_CSSComputedStyle,
                               public IFDE_CSSBoundaryStyle,
                               public IFDE_CSSFontStyle,
                               public IFDE_CSSPositionStyle,
                               public IFDE_CSSParagraphStyle,
                               public CFX_Target {
  public:
   CFDE_CSSComputedStyle(IFX_MemoryAllocator* pAlloc)
       : m_dwRefCount(1), m_pAllocator(pAlloc) {}
 
-  ~CFDE_CSSComputedStyle() {}
+  ~CFDE_CSSComputedStyle() override {}
 
-  // IFX_Unknown:
-  uint32_t AddRef() override { return ++m_dwRefCount; }
-
+  // IFX_Retainable:
+  uint32_t Retain() override { return ++m_dwRefCount; }
   uint32_t Release() override {
     uint32_t dwRefCount = --m_dwRefCount;
     if (dwRefCount == 0) {
       delete m_NonInheritedData.m_pCounterStyle;
       FXTARGET_DeleteWith(CFDE_CSSComputedStyle, m_pAllocator, this);
     }
     return dwRefCount;
   }
 
   // IFDE_CSSComputedStyle:
@@ skipping 172 matching lines @@
   }
 
   uint32_t m_dwRefCount;
   IFX_MemoryAllocator* m_pAllocator;
   CFDE_CSSInheritedData m_InheritedData;
   CFDE_CSSNonInheritedData m_NonInheritedData;
   CFX_WideStringArray m_CustomProperties;
 };
 
 #endif  // XFA_FDE_CSS_FDE_CSSSTYLESELECTOR_H_