Update freetype to 2.5.4.

pdfium.gyp

 {
   'variables': {
     'pdf_use_skia%': 0,
   },
   'target_defaults': {
     'defines' : [
-      '_FXFT_VERSION_=2501',
+      'FT2_BUILD_LIBRARY',
       '_FPDFSDK_LIB',
       '_NO_GDIPLUS_',  # workaround text rendering issues on Windows
       'OPJ_STATIC',
     ],
+    'include_dirs': [
+      'third_party/freetype/include',
+    ],
     'conditions': [
       ['pdf_use_skia==1', {
         'defines': ['_SKIA_SUPPORT_'],
       }],
       ['OS=="linux"', {
         'conditions': [
           ['target_arch=="x64"', {
             'defines' : [ '_FX_CPU_=_FX_X64_', ],
             'cflags': [ '-fPIC', ],
           }],
           ['target_arch=="ia32"', {
             'defines' : [ '_FX_CPU_=_FX_X86_', ],
           }],
         ],
       }],
     ],
     'msvs_disabled_warnings': [
       4005, 4018, 4146, 4333, 4345, 4267
     ],
   },
   'targets': [
     {
       'target_name': 'pdfium',
       'type': 'static_library',
       'dependencies': [
-        'safemath',
-        'bigint',
+        'third_party/third_party.gyp:safemath',
+        'third_party/third_party.gyp:bigint',
+        'third_party/third_party.gyp:freetype',
         'fdrm',
         'fpdfdoc',
         'fpdfapi',
         'fpdftext',
         'formfiller',
         'fxcodec',
         'fxcrt',
         'fxedit',
         'fxge',
         'javascript',
@@ skipping 66 matching lines @@
               'libraries': [
                 '$(SDKROOT)/System/Library/Frameworks/AppKit.framework',
                 '$(SDKROOT)/System/Library/Frameworks/CoreFoundation.framework',
               ],
             },
           }],
         ],
       },
     },
     {
-      'target_name': 'safemath',
-      'type': 'none',
-      'sources': [
-        'third_party/logging.h',
-        'third_party/macros.h',
-        'third_party/template_util.h',
-        'third_party/numerics/safe_conversions.h',
-        'third_party/numerics/safe_conversions_impl.h',
-        'third_party/numerics/safe_math.h',
-        'third_party/numerics/safe_math_impl.h',
-      ],
-    },
-    {
-      'target_name': 'bigint',
-      'type': 'static_library',
-      'sources': [
-        'third_party/bigint/BigInteger.hh',
-        'third_party/bigint/BigIntegerLibrary.hh',
-        'third_party/bigint/BigIntegerUtils.hh',
-        'third_party/bigint/BigUnsigned.hh',
-        'third_party/bigint/NumberlikeArray.hh',
-        'third_party/bigint/BigUnsignedInABase.hh',
-        'third_party/bigint/BigInteger.cc',
-        'third_party/bigint/BigIntegerUtils.cc',
-        'third_party/bigint/BigUnsigned.cc',
-        'third_party/bigint/BigUnsignedInABase.cc',
-      ],
-    },
-    {
       'target_name': 'fdrm',
       'type': 'static_library',
       'ldflags': [ '-L<(PRODUCT_DIR)',],
       'sources': [
         'core/include/fdrm/fx_crypt.h',
         'core/src/fdrm/crypto/fx_crypt.cpp',
         'core/src/fdrm/crypto/fx_crypt_aes.cpp',
         'core/src/fdrm/crypto/fx_crypt_sha.cpp',
       ],
     },
@@ skipping 441 matching lines @@
         'core/src/fxge/fontdata/chromefontdata/FoxitSansBold.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSansBoldItalic.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSansItalic.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSansMM.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSerif.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSerifBold.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSerifBoldItalic.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSerifItalic.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSerifMM.c',
         'core/src/fxge/fontdata/chromefontdata/FoxitSymbol.c',
-        'core/src/fxge/fx_freetype/include/fxft_cffobjs.h',
-        'core/src/fxge/fx_freetype/include/fxft_cfftypes.h',
-        'core/src/fxge/fx_freetype/include/fxft_freetype.h',
-        'core/src/fxge/fx_freetype/include/fxft_ft2build.h',
-        'core/src/fxge/fx_freetype/include/fxft_ftmm.h',
-        'core/src/fxge/fx_freetype/include/fxft_ftobjs.h',
-        'core/src/fxge/fx_freetype/include/fxft_ftotval.h',
-        'core/src/fxge/fx_freetype/include/fxft_ftoutln.h',
-        'core/src/fxge/fx_freetype/include/fxft_ftstream.h',
-        'core/src/fxge/fx_freetype/include/fxft_tttables.h',
-        'core/src/fxge/fx_freetype/include/fxft_tttypes.h',
-        'core/src/fxge/fx_freetype/src/fxft_cff.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftbase.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftbitmap.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftglyph.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftinit.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftlcdfil.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftmm.c',
-        'core/src/fxge/fx_freetype/src/fxft_ftsystem.c',
-        'core/src/fxge/fx_freetype/src/fxft_psaux.c',
-        'core/src/fxge/fx_freetype/src/fxft_pshinter.c',
-        'core/src/fxge/fx_freetype/src/fxft_psmodule.c',
-        'core/src/fxge/fx_freetype/src/fxft_raster.c',
-        'core/src/fxge/fx_freetype/src/fxft_sfnt.c',
-        'core/src/fxge/fx_freetype/src/fxft_smooth.c',
-        'core/src/fxge/fx_freetype/src/fxft_truetype.c',
-        'core/src/fxge/fx_freetype/src/fxft_type1.c',
-        'core/src/fxge/fx_freetype/src/fxft_type1cid.c',
+        'core/src/fxge/freetype/fx_freetype.c',
         'core/src/fxge/ge/fx_ge.cpp',
         'core/src/fxge/ge/fx_ge_device.cpp',
         'core/src/fxge/ge/fx_ge_font.cpp',
         'core/src/fxge/ge/fx_ge_fontmap.cpp',
         'core/src/fxge/ge/fx_ge_linux.cpp',
         'core/src/fxge/ge/fx_ge_path.cpp',
         'core/src/fxge/ge/fx_ge_ps.cpp',
         'core/src/fxge/ge/fx_ge_text.cpp',
         'core/src/fxge/ge/text_int.h',
       ],
@@ skipping 196 matching lines @@
         'fpdfsdk/src/formfiller/FFL_ListBox.cpp',
         'fpdfsdk/src/formfiller/FFL_Notify.cpp',
         'fpdfsdk/src/formfiller/FFL_PushButton.cpp',
         'fpdfsdk/src/formfiller/FFL_RadioButton.cpp',
         'fpdfsdk/src/formfiller/FFL_TextField.cpp',
         'fpdfsdk/src/formfiller/FFL_Utils.cpp',
       ],
     },
   ],
 }