Cleanup some extern method declarations.

core/fxge/ge/fx_ge_font.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 "core/fxge/ge/fx_text_int.h"
 #include "core/include/fxge/fx_freetype.h"
 #include "core/include/fxge/fx_ge.h"
 
 #define EM_ADJUST(em, a) (em == 0 ? (a) : (a)*1000 / em)
 
-#ifdef PDF_ENABLE_XFA
-extern void _FPDFAPI_GetInternalFontData(int id1,
-                                         const uint8_t*& data,
-                                         FX_DWORD& size);
-#endif  // PDF_ENABLE_XFA
-
 namespace {
 
 #ifdef PDF_ENABLE_XFA
 const FX_DWORD g_EncodingID[] = {
     FXFM_ENCODING_MS_SYMBOL,     FXFM_ENCODING_UNICODE,
     FXFM_ENCODING_MS_SJIS,       FXFM_ENCODING_MS_GB2312,
     FXFM_ENCODING_MS_BIG5,       FXFM_ENCODING_MS_WANSUNG,
     FXFM_ENCODING_MS_JOHAB,      FXFM_ENCODING_ADOBE_STANDARD,
     FXFM_ENCODING_ADOBE_EXPERT,  FXFM_ENCODING_ADOBE_CUSTOM,
     FXFM_ENCODING_ADOBE_LATIN_1, FXFM_ENCODING_OLD_LATIN_2,
@@ skipping 507 matching lines @@
   for (size_t i = 0; i < FX_ArraySize(g_EncodingID); ++i) {
     CFX_UnicodeEncodingEx* pFontEncoding =
         _FXFM_CreateFontEncoding(pFont, g_EncodingID[i]);
     if (pFontEncoding) {
       return pFontEncoding;
     }
   }
   return NULL;
 }
 #endif  // PDF_ENABLE_XFA