Add native extensions for the Dart shell to the MacOs platform

runtime/bin/bin.gypi

 # Copyright (c) 2012, the Dart project authors.  Please see the AUTHORS file
 # for details. All rights reserved. Use of this source code is governed by a
 # BSD-style license that can be found in the LICENSE file.
 
 {
   'variables': {
     'io_cc_file': '<(SHARED_INTERMEDIATE_DIR)/io_gen.cc',
     'json_cc_file': '<(SHARED_INTERMEDIATE_DIR)/json_gen.cc',
     'uri_cc_file': '<(SHARED_INTERMEDIATE_DIR)/uri_gen.cc',
     'utf8_cc_file': '<(SHARED_INTERMEDIATE_DIR)/utf8_gen.cc',
@@ skipping 401 matching lines @@
       'conditions': [
         ['OS=="win"', {
           'link_settings': {
             'libraries': [ '-lws2_32.lib', '-lRpcrt4.lib' ],
           },
         }],
       ],
     },
   ],
   'conditions': [
-    ['OS=="linux"', {
+    ['OS!="win"', {
       'targets': [
         {
           'target_name': 'test_extension',
           'type': 'shared_library',
           'dependencies': [
           ],
           'include_dirs': [
             '.',
           ],
           'sources': [
-            'test_extension_linux.cc',
+            'test_extension_posix.cc',

[Mads Ager (google), 2012/03/06 07:39:50]

This should just be test_extension.cc and everything needed to build it should
be included here. All the special flags for the different platforms.

           ],
           'defines': [
             'DART_SHARED_LIB',
           ],
         },
       ],
     }],
   ],
 }