bring pdfium file in sync with chrome, fix mac build

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/include/fx_font.h"
 
 #include "core/fpdfapi/fpdf_font/include/cpdf_font.h"
 #include "core/fxge/ge/fx_text_int.h"
@@ skipping 100 matching lines @@
     if (m_bEmbedded) {
       DeleteFace();
     } else {
       CFX_GEModule::Get()->GetFontMgr()->ReleaseFace(m_Face);
     }
   }
 #ifdef PDF_ENABLE_XFA
   FX_Free(m_pOwnedStream);
 #endif  // PDF_ENABLE_XFA
   FX_Free(m_pGsubData);
-#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_
+#if _FXM_PLATFORM_ == _FXM_PLATFORM_APPLE_ && !defined _SKIA_SUPPORT_
   ReleasePlatformResource();
 #endif
 }
 void CFX_Font::DeleteFace() {
   FXFT_Done_Face(m_Face);
   m_Face = nullptr;
 }
 void CFX_Font::LoadSubst(const CFX_ByteString& face_name,
                          FX_BOOL bTrueType,
                          uint32_t flags,
@@ skipping 399 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 nullptr;
 }
 #endif  // PDF_ENABLE_XFA