Properly ref-count CFGAS_GEFont with CFX_RetainPtr.

xfa/fde/fde_visualset.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_FDE_VISUALSET_H_
 #define XFA_FDE_FDE_VISUALSET_H_
 
+#include "core/fxcrt/cfx_retain_ptr.h"
 #include "core/fxcrt/fx_coordinates.h"
 #include "core/fxcrt/fx_system.h"
 #include "core/fxge/fx_dib.h"
 #include "xfa/fde/cfde_path.h"
 #include "xfa/fde/fde_object.h"
 #include "xfa/fgas/crt/fgas_memory.h"
 #include "xfa/fgas/font/cfgas_fontmgr.h"
 
 struct FXTEXT_CHARPOS;
 
@@ skipping 21 matching lines @@
  public:
   virtual FX_POSITION GetFirstPosition() = 0;
   virtual FDE_TEXTEDITPIECE* GetNext(FX_POSITION& pos,
                                      IFDE_VisualSet*& pVisualSet) = 0;
 };
 
 class IFDE_TextSet : public IFDE_VisualSet {
  public:
   virtual int32_t GetString(FDE_TEXTEDITPIECE* hText,
                             CFX_WideString& wsText) = 0;
-  virtual CFGAS_GEFont* GetFont() = 0;
+  virtual CFX_RetainPtr<CFGAS_GEFont> GetFont() = 0;
   virtual FX_FLOAT GetFontSize() = 0;
   virtual FX_ARGB GetFontColor() = 0;
   virtual int32_t GetDisplayPos(FDE_TEXTEDITPIECE* hText,
                                 FXTEXT_CHARPOS* pCharPos,
                                 bool bCharCode = false,
                                 CFX_WideString* pWSForms = nullptr) = 0;
   virtual int32_t GetCharRects(const FDE_TEXTEDITPIECE* hText,
                                CFX_RectFArray& rtArray,
                                bool bbox) = 0;
 };
 
 #endif  // XFA_FDE_FDE_VISUALSET_H_