Extern in .cpp file is a code smell, part 2.

core/src/fpdfapi/fpdf_font/fpdf_font_charset.cpp

 // Copyright 2014 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
 
 #include "../../../include/fpdfapi/fpdf_page.h"
+#include "../../../include/fpdfapi/fpdf_parser.h"
 #include "../../../include/fpdfapi/fpdf_resource.h"
 #include "../../../include/fxge/fx_freetype.h"
 
-// TODO(tsepez): These belong in headers, too.
-extern const FX_WORD PDFDocEncoding[256];
-
 static const struct _UnicodeAlt {
   FX_WORD m_Unicode;
   const FX_CHAR* m_Alter;
 } UnicodeAlts[] = {
     {0x00a0, " "},    {0x00a1, "!"},   {0x00a2, "c"},   {0x00a3, "P"},
     {0x00a4, "o"},    {0x00a5, "Y"},   {0x00a6, "|"},   {0x00a7, "S"},
     {0x00a9, "(C)"},  {0x00aa, "a"},   {0x00ab, "<<"},  {0x00ac, "-|"},
     {0x00ae, "(R)"},  {0x00af, "-"},   {0x00b0, "o"},   {0x00b1, "+/-"},
     {0x00b2, "^2"},   {0x00b3, "^3"},  {0x00b4, "'"},   {0x00b5, "u"},
     {0x00b6, "P"},    {0x00b7, "."},   {0x00b9, "^1"},  {0x00ba, "o"},
@@ skipping 1743 matching lines @@
     case PDFFONT_ENCODING_PDFDOC:
       return PDFDocEncoding;
     case PDFFONT_ENCODING_MS_SYMBOL:
       return MSSymbolEncoding;
   }
   return NULL;
 }
 FX_DWORD PDF_PredefinedCharCodeFromUnicode(int encoding, FX_WCHAR unicode) {
   return PDF_FindCode(PDF_UnicodesForPredefinedCharSet(encoding), unicode);
 }
-#ifdef __cplusplus
-extern "C" {
-#endif
-extern int FXFT_unicode_from_adobe_name(const char* name);
-extern void FXFT_adobe_name_from_unicode(char* glyph_name, FX_WCHAR unicode);
-#ifdef __cplusplus
-}
-#endif
 FX_WCHAR PDF_UnicodeFromAdobeName(const FX_CHAR* name) {
   return (FX_WCHAR)(FXFT_unicode_from_adobe_name(name) & 0x7FFFFFFF);
 }
 CFX_ByteString PDF_AdobeNameFromUnicode(FX_WCHAR unicode) {
   char glyph_name[64];
   FXFT_adobe_name_from_unicode(glyph_name, unicode);
   return CFX_ByteString(glyph_name, -1);
 }