Continue with the FreeBSD port - this version builds and links, though...

ipc/ipc.gyp

 # Copyright (c) 2009 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 {
   'includes': [
     '../build/common.gypi',
   ],
   'target_defaults': {
     'sources/': [
       ['exclude', '/win/'],
       ['exclude', '_(posix|win)(_unittest)?\\.(cc|mm?)$'],
       ['exclude', '/win_[^/]*\\.cc$'],
     ],
     'conditions': [
-      ['OS=="linux"', {'sources/': [
+      ['OS=="linux" or OS=="freebsd"', {'sources/': [
         ['include', '_posix(_unittest)?\\.cc$'],
       ]}],
       ['OS=="mac"', {'sources/': [
         ['include', '_posix(_unittest)?\\.(cc|mm?)$'],
       ]}],
       ['OS=="win"', {'sources/': [
         ['include', '_win(_unittest)?\\.cc$'],
         ['include', '/win/'],
         ['include', '/win_[^/]*\\.cc$'],
       ]}],
@@ skipping 58 matching lines @@
         'ipc_fuzzing_tests.cc',
         'ipc_message_unittest.cc',
         'ipc_send_fds_test.cc',
         'ipc_sync_channel_unittest.cc',
         'ipc_sync_message_unittest.cc',
         'ipc_sync_message_unittest.h',
         'ipc_tests.cc',
         'ipc_tests.h',
       ],
       'conditions': [
-        ['OS=="linux"', {
+        ['OS=="linux" or OS=="freebsd"', {
           'dependencies': [
             '../build/linux/system.gyp:gtk',
           ],
         }],
         ['OS=="linux" and toolkit_views==1', {
           'dependencies': [
             '../views/views.gyp:views',
           ],
         }],
       ],
     },
   ]
 }