Finish modules build in GN.

Source/config.gyp

 #
 # Copyright (C) 2013 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 24 matching lines @@
     'enable_oilpan%': 0,
     # If set to 1 (default) and using clang, the Blink GC plugin will check the
     # usage of the garbage-collection infrastructure during compilation.
     'blink_gc_plugin%': 1,
     # If set to 1 together with blink_gc_plugin, the Blink GC plugin will dump
     # points-to graph files for each compilation unit.
     'blink_gc_plugin_dump_graph%': 0,
   },
   'targets': [
   {
+    # GN version: //third_party/WebKit/Source:config
+    #   (In GN this is a config rather than a target.)
     'target_name': 'config',
     'type': 'none',
     'direct_dependent_settings': {
       'include_dirs': [
         '.',
         '..',
       ],
       'msvs_disabled_warnings': [
         4305, 4324, 4714, 4800, 4996,
       ],
@@ skipping 73 matching lines @@
       'xcode_settings': {
         'WARNING_CFLAGS!': ['-Wglobal-constructors'],
       },
       'variables': {
         'chromium_code': 1,
       },
     },
   }
   ],
 }