Remove FX_DWORD from core/ and delete definition

core/fpdfapi/fpdf_font/cpdf_simplefont.h

Index: core/fpdfapi/fpdf_font/cpdf_simplefont.h
diff --git a/core/fpdfapi/fpdf_font/cpdf_simplefont.h b/core/fpdfapi/fpdf_font/cpdf_simplefont.h
index 19d6816c9f52e9f8b6473fb91b3db9f36c38807e..7b07c9971ea44457203906488ea7ec65825b9bb7 100644
--- a/core/fpdfapi/fpdf_font/cpdf_simplefont.h
+++ b/core/fpdfapi/fpdf_font/cpdf_simplefont.h
@@ -18,12 +18,12 @@ class CPDF_SimpleFont : public CPDF_Font {
   virtual ~CPDF_SimpleFont();
 
   // CPDF_Font:
-  int GetCharWidthF(FX_DWORD charcode, int level = 0) override;
-  FX_RECT GetCharBBox(FX_DWORD charcode, int level = 0) override;
-  int GlyphFromCharCode(FX_DWORD charcode, FX_BOOL* pVertGlyph = NULL) override;
+  int GetCharWidthF(uint32_t charcode, int level = 0) override;
+  FX_RECT GetCharBBox(uint32_t charcode, int level = 0) override;
+  int GlyphFromCharCode(uint32_t charcode, FX_BOOL* pVertGlyph = NULL) override;
   FX_BOOL IsUnicodeCompatible() const override;
-  CFX_WideString UnicodeFromCharCode(FX_DWORD charcode) const override;
-  FX_DWORD CharCodeFromUnicode(FX_WCHAR Unicode) const override;
+  CFX_WideString UnicodeFromCharCode(uint32_t charcode) const override;
+  uint32_t CharCodeFromUnicode(FX_WCHAR Unicode) const override;
 
   CPDF_FontEncoding* GetEncoding() { return &m_Encoding; }