Properly ref-count CFGAS_GEFont with CFX_RetainPtr.

xfa/fde/tto/fde_textout.h

Index: xfa/fde/tto/fde_textout.h
diff --git a/xfa/fde/tto/fde_textout.h b/xfa/fde/tto/fde_textout.h
index 684a6411faf73a4368536f7f0e0365473bf8e9e7..f9eeb82ddcbfa5befda9b58a7cec4ac6e8e0bd02 100644
--- a/xfa/fde/tto/fde_textout.h
+++ b/xfa/fde/tto/fde_textout.h
@@ -79,7 +79,7 @@ class CFDE_TextOut : public CFX_Target {
   CFDE_TextOut();
   ~CFDE_TextOut() override;
 
-  void SetFont(CFGAS_GEFont* pFont);
+  void SetFont(const CFX_RetainPtr<CFGAS_GEFont>& pFont);
   void SetFontSize(FX_FLOAT fFontSize);
   void SetTextColor(FX_ARGB color);
   void SetStyles(uint32_t dwStyles);
@@ -153,7 +153,7 @@ class CFDE_TextOut : public CFX_Target {
   void DrawLine(const FDE_TTOPIECE* pPiece, CFDE_Pen*& pPen);
 
   std::unique_ptr<CFX_TxtBreak> m_pTxtBreak;
-  CFGAS_GEFont* m_pFont;  // not owned.
+  CFX_RetainPtr<CFGAS_GEFont> m_pFont;
   FX_FLOAT m_fFontSize;
   FX_FLOAT m_fLineSpace;
   FX_FLOAT m_fLinePos;