Remove unused IFDE_CSSStyleSheetCache/CFDE_CSSStyleSheetCache.

xfa/fde/css/fde_csscache.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_CSSCACHE_H_
 #define XFA_FDE_CSS_FDE_CSSCACHE_H_
 
 #include <map>
 
 #include "xfa/fde/css/fde_css.h"
 #include "xfa/fgas/crt/fgas_memory.h"
 
 class FDE_CSSCacheItem : public CFX_Target {
  public:
   explicit FDE_CSSCacheItem(IFDE_CSSStyleSheet* p);
   ~FDE_CSSCacheItem();
 
   IFDE_CSSStyleSheet* pStylesheet;
   uint32_t dwActivity;
 };
 
-class CFDE_CSSStyleSheetCache : public IFDE_CSSStyleSheetCache,
-                                public CFX_Target {
- public:
-  CFDE_CSSStyleSheetCache();
-  ~CFDE_CSSStyleSheetCache();
-  virtual void Release() { delete this; }
-
-  virtual void SetMaxItems(int32_t iMaxCount = 5) {
-    FXSYS_assert(iMaxCount >= 3);
-    m_iMaxItems = iMaxCount;
-  }
-
-  virtual void AddStyleSheet(const CFX_ByteStringC& szKey,
-                             IFDE_CSSStyleSheet* pStyleSheet);
-  virtual IFDE_CSSStyleSheet* GetStyleSheet(const CFX_ByteStringC& szKey) const;
-  virtual void RemoveStyleSheet(const CFX_ByteStringC& szKey);
-
- protected:
-  void RemoveLowestActivityItem();
-  std::map<CFX_ByteString, FDE_CSSCacheItem*> m_Stylesheets;
-  IFX_MEMAllocator* m_pFixedStore;
-  int32_t m_iMaxItems;
-};
-
 class FDE_CSSTagCache : public CFX_Target {
  public:
   FDE_CSSTagCache(FDE_CSSTagCache* parent, IFDE_CSSTagProvider* tag);
   FDE_CSSTagCache(const FDE_CSSTagCache& it);
   FDE_CSSTagCache* GetParent() const { return pParent; }
   IFDE_CSSTagProvider* GetTag() const { return pTag; }
   uint32_t HashID() const { return dwIDHash; }
   uint32_t HashTag() const { return dwTagHash; }
   int32_t CountHashClass() const { return dwClassHashs.GetSize(); }
   void SetClassIndex(int32_t index) { iClassIndex = index; }
@@ skipping 20 matching lines @@
 
   void Clear() { m_Stack.RemoveAll(); }
 
   FDE_CSSTagCache* GetTopElement() const { return m_Stack.GetTopElement(); }
 
  protected:
   CFDE_CSSTagStack m_Stack;
 };
 
 #endif  // XFA_FDE_CSS_FDE_CSSCACHE_H_