Make code compile with clang_use_chrome_plugin (part V)

xfa/fxfa/include/xfa_fontmgr.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_FXFA_INCLUDE_XFA_FONTMGR_H_
 #define XFA_FXFA_INCLUDE_XFA_FONTMGR_H_
 
 #include <map>
 #include <memory>
 
 #include "core/fxcrt/include/fx_ext.h"
 #include "core/fxcrt/include/fx_system.h"
 #include "xfa/fgas/font/fgas_font.h"
 #include "xfa/fxfa/include/fxfa.h"
 
 class CPDF_Font;
 
 struct XFA_FONTINFO {
   uint32_t dwFontNameHash;
   const FX_WCHAR* pPsName;
   const FX_WCHAR* pReplaceFont;
   uint16_t dwStyles;
   uint16_t wCodePage;
 };
 
 class CXFA_DefFontMgr {
  public:
-  CXFA_DefFontMgr() {}
+  CXFA_DefFontMgr();
   ~CXFA_DefFontMgr();
 
   CFGAS_GEFont* GetFont(CXFA_FFDoc* hDoc,
                         const CFX_WideStringC& wsFontFamily,
                         uint32_t dwFontStyles,
                         uint16_t wCodePage = 0xFFFF);
   CFGAS_GEFont* GetDefaultFont(CXFA_FFDoc* hDoc,
                                const CFX_WideStringC& wsFontFamily,
                                uint32_t dwFontStyles,
                                uint16_t wCodePage = 0xFFFF);
@@ skipping 49 matching lines @@
   void ReleaseDocFonts(CXFA_FFDoc* hDoc);
   void SetDefFontMgr(std::unique_ptr<CXFA_DefFontMgr> pFontMgr);
 
  protected:
   std::unique_ptr<CXFA_DefFontMgr> m_pDefFontMgr;
   std::map<CXFA_FFDoc*, std::unique_ptr<CXFA_PDFFontMgr>> m_PDFFontMgrMap;
   std::map<CFX_ByteString, CFGAS_GEFont*> m_FontMap;
 };
 
 #endif  //  XFA_FXFA_INCLUDE_XFA_FONTMGR_H_