Remove now-unnecessary setting of /bigobj

Source/core/core.gyp

 #
 # Copyright (C) 2009 Google Inc. All rights reserved.
 #
 # Redistribution and use in source and binary forms, with or without
 # modification, are permitted provided that the following conditions are
 # met:
 #
 #     * Redistributions of source code must retain the above copyright
 # notice, this list of conditions and the following disclaimer.
 #     * Redistributions in binary form must reproduce the above
@@ skipping 781 matching lines @@
             }, {
               'sources!': [
                 'layout/LayoutThemeFontProviderWin.cpp',
                 'layout/LayoutThemeWin.cpp',
                 'layout/LayoutThemeWin.h',
               ],
               'libraries': [
                 '-lm -lstdc++',
               ],
             }],
-            # Enable bigobj to fix fatal error C1128: number of sections
-            # exceeded object file format limit while compiling Document.cpp.
-            ['OS=="win" and target_arch=="x64"', {
-              'msvs_settings': {
-                'VCCLCompilerTool': {
-                  'AdditionalOptions': ['/bigobj'],
-                },
-              },
-            }],
             ['OS=="win" and chromium_win_pch==1', {
               'sources/': [
                 ['include', '<(DEPTH)/third_party/WebKit/Source/build/win/Precompile.cpp'],
               ],
             }],
             ['OS=="mac"', {
               'sources!': [
                 # LayoutThemeSkia is not used on mac since LayoutThemeMac
                 # does not reference the Skia code that is used by Windows, Linux and Android.
                 'layout/LayoutThemeSkia.cpp',
@@ skipping 60 matching lines @@
             'libraries': [
                '<!@(pkg-config --libs ipp|sed s/-L//)/libipps_l.a',
                '<!@(pkg-config --libs ipp|sed s/-L//)/libippcore_l.a',
             ]
           },
         }],
       ],
     },
   ],  # targets
 }