Remove FX_DWORD from core/ and delete definition

core/fpdfapi/fpdf_font/include/cpdf_fontencoding.h

 // Copyright 2016 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 CORE_FPDFAPI_FPDF_FONT_INCLUDE_CPDF_FONTENCODING_H_
 #define CORE_FPDFAPI_FPDF_FONT_INCLUDE_CPDF_FONTENCODING_H_
 
 #include "core/fxcrt/include/fx_string.h"
 
 #define PDFFONT_ENCODING_BUILTIN 0
 #define PDFFONT_ENCODING_WINANSI 1
 #define PDFFONT_ENCODING_MACROMAN 2
 #define PDFFONT_ENCODING_MACEXPERT 3
 #define PDFFONT_ENCODING_STANDARD 4
 #define PDFFONT_ENCODING_ADOBE_SYMBOL 5
 #define PDFFONT_ENCODING_ZAPFDINGBATS 6
 #define PDFFONT_ENCODING_PDFDOC 7
 #define PDFFONT_ENCODING_MS_SYMBOL 8
 #define PDFFONT_ENCODING_UNICODE 9
 
-FX_DWORD FT_CharCodeFromUnicode(int encoding, FX_WCHAR unicode);
-FX_WCHAR FT_UnicodeFromCharCode(int encoding, FX_DWORD charcode);
+uint32_t FT_CharCodeFromUnicode(int encoding, FX_WCHAR unicode);
+FX_WCHAR FT_UnicodeFromCharCode(int encoding, uint32_t charcode);
 
 FX_WCHAR PDF_UnicodeFromAdobeName(const FX_CHAR* name);
 CFX_ByteString PDF_AdobeNameFromUnicode(FX_WCHAR unicode);
 
 const uint16_t* PDF_UnicodesForPredefinedCharSet(int encoding);
 const FX_CHAR* PDF_CharNameFromPredefinedCharSet(int encoding,
                                                  uint8_t charcode);
 
 class CPDF_Object;
 
@@ skipping 15 matching lines @@
     m_Unicodes[charcode] = unicode;
   }
 
   CPDF_Object* Realize();
 
  public:
   FX_WCHAR m_Unicodes[256];
 };
 
 #endif  // CORE_FPDFAPI_FPDF_FONT_INCLUDE_CPDF_FONTENCODING_H_