Replace IFGAS_Font with underlying concrete type

xfa/fgas/layout/fgas_textbreak.h

Index: xfa/fgas/layout/fgas_textbreak.h
diff --git a/xfa/fgas/layout/fgas_textbreak.h b/xfa/fgas/layout/fgas_textbreak.h
index db0b7f604e54fc8fcf6b9bb033c65598166e29b1..9943eab2c708486b43bc4ed94839c42bc665a169 100644
--- a/xfa/fgas/layout/fgas_textbreak.h
+++ b/xfa/fgas/layout/fgas_textbreak.h
@@ -13,9 +13,9 @@
 #include "xfa/fgas/layout/fgas_unicode.h"
 
 class CFX_Char;
+class CFGAS_GEFont;
 class CFX_TxtChar;
 class CFX_TxtPiece;
-class IFGAS_Font;
 class IFX_TxtAccess;
 
 #define FX_TXTBREAKPOLICY_None 0x00
@@ -103,7 +103,7 @@ struct FX_TXTRUN {
   CFX_WideString wsStr;
   int32_t* pWidths;
   int32_t iLength;
-  IFGAS_Font* pFont;
+  CFGAS_GEFont* pFont;
   FX_FLOAT fFontSize;
   uint32_t dwStyles;
   int32_t iHorizontalScale;
@@ -232,7 +232,7 @@ class CFX_TxtBreak {
   void SetLinePos(FX_FLOAT fLinePos);
   uint32_t GetLayoutStyles() const { return m_dwLayoutStyles; }
   void SetLayoutStyles(uint32_t dwLayoutStyles);
-  void SetFont(IFGAS_Font* pFont);
+  void SetFont(CFGAS_GEFont* pFont);
   void SetFontSize(FX_FLOAT fFontSize);
   void SetTabWidth(FX_FLOAT fTabWidth, FX_BOOL bEquidistant);
   void SetDefaultChar(FX_WCHAR wch);
@@ -306,7 +306,7 @@ class CFX_TxtBreak {
   FX_BOOL m_bCombText;
   int32_t m_iArabicContext;
   int32_t m_iCurArabicContext;
-  IFGAS_Font* m_pFont;
+  CFGAS_GEFont* m_pFont;
   int32_t m_iFontSize;
   FX_BOOL m_bEquidistant;
   int32_t m_iTabWidth;