Remove duplicated charset definitions

core/fxge/include/fx_font.h

Index: core/fxge/include/fx_font.h
diff --git a/core/fxge/include/fx_font.h b/core/fxge/include/fx_font.h
index 00c9d6f55970cd233461e0a08068a54fe964e7b8..58d12bbb2afc5ebb44b1e7a5cf83db5710b8fed2 100644
--- a/core/fxge/include/fx_font.h
+++ b/core/fxge/include/fx_font.h
@@ -29,22 +29,12 @@ class SkTypeface;
 using CFX_TypeFace = SkTypeface;
 #endif
 
-#define FXFONT_FIXED_PITCH 0x01
-#define FXFONT_SERIF 0x02
-#define FXFONT_SYMBOLIC 0x04
-#define FXFONT_SCRIPT 0x08
-#define FXFONT_ITALIC 0x40
-#define FXFONT_BOLD 0x40000
-#define FXFONT_USEEXTERNATTR 0x80000
-#define FXFONT_CIDFONT 0x100000
-#ifdef PDF_ENABLE_XFA
-#define FXFONT_EXACTMATCH 0x80000000
-#endif  // PDF_ENABLE_XFA
+/* Character sets for the font */
 #define FXFONT_ANSI_CHARSET 0
 #define FXFONT_DEFAULT_CHARSET 1
 #define FXFONT_SYMBOL_CHARSET 2
 #define FXFONT_SHIFTJIS_CHARSET 128
-#define FXFONT_HANGEUL_CHARSET 129
+#define FXFONT_HANGUL_CHARSET 129
 #define FXFONT_GB2312_CHARSET 134
 #define FXFONT_CHINESEBIG5_CHARSET 136
 #define FXFONT_THAI_CHARSET 222
@@ -55,12 +45,31 @@ using CFX_TypeFace = SkTypeface;
 #define FXFONT_HEBREW_CHARSET 177
 #define FXFONT_ARABIC_CHARSET 178
 #define FXFONT_BALTIC_CHARSET 186
+#define FXFONT_JOHAB_CHARSET 130
+#define FXFONT_VIETNAMESE_CHARSET 163
+
+/* Font pitch and family flags */
 #define FXFONT_FF_FIXEDPITCH 1
 #define FXFONT_FF_ROMAN (1 << 4)
 #define FXFONT_FF_SCRIPT (4 << 4)
+
+/* Typical weight values */
 #define FXFONT_FW_NORMAL 400
 #define FXFONT_FW_BOLD 700
 
+/* Font styles */
+#define FXFONT_FIXED_PITCH 0x01
+#define FXFONT_SERIF 0x02
+#define FXFONT_SYMBOLIC 0x04
+#define FXFONT_SCRIPT 0x08
+#define FXFONT_ITALIC 0x40
+#define FXFONT_BOLD 0x40000
+#define FXFONT_USEEXTERNATTR 0x80000
+#define FXFONT_CIDFONT 0x100000
+#ifdef PDF_ENABLE_XFA
+#define FXFONT_EXACTMATCH 0x80000000
+#endif  // PDF_ENABLE_XFA
+
 #define CHARSET_FLAG_ANSI 1
 #define CHARSET_FLAG_SYMBOL 2
 #define CHARSET_FLAG_SHIFTJIS 4