Replace agg with skia

core/src/fxge/apple/apple_int.h

 // 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
 
 #ifndef _APPLE_INT_H_
 #define _APPLE_INT_H_
 #if _FXM_PLATFORM_  == _FXM_PLATFORM_APPLE_
 #if _FX_OS_ == _FX_MACOSX_
@@ skipping 224 matching lines @@
     FontHeader _fontHeader;
     unsigned char * _tableEntries;
     size_t * _tableOffsets;
     int _tableCount;
     int _totalSize;
 };
 FX_UINT32 FX_GetHashCode( FX_LPCSTR pStr);
 FX_DWORD  FX_IOSGetMatchFamilyNameHashcode(FX_LPCSTR pFontName);
 FX_UINT32 FX_IOSGetFamilyNamesCount();
 FX_LPCSTR FX_IOSGetFamilyName( FX_UINT32 uIndex);
+static void _DoNothing(void *info, const void *data, size_t size) {};
+FX_BOOL _CGDrawGlyphRun(CGContextRef               pContext,
+    int                        nChars,
+    const FXTEXT_CHARPOS*      pCharPos,
+    CFX_Font*                  pFont,
+    CFX_FontCache*             pCache,
+    const CFX_AffineMatrix*    pObject2Device,
+    FX_FLOAT                   font_size,
+    FX_DWORD                   argb,
+    int                        alpha_flag,
+    void*                      pIccTransform);
 #endif
 #endif