Add DirectoryWatcher implementation for Mac.

base/base.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.
 
 {
   'variables': {
     'chromium_code': 1,
   },
   'includes': [
     '../build/common.gypi',
@@ skipping 70 matching lines @@
         'data_pack.cc',
         'debug_on_start.cc',
         'debug_on_start.h',
         'debug_util.cc',
         'debug_util.h',
         'debug_util_mac.cc',
         'debug_util_posix.cc',
         'debug_util_win.cc',
         'directory_watcher.h',
         'directory_watcher_inotify.cc',
+        'directory_watcher_mac.cc',
         'directory_watcher_win.cc',
         'event_recorder.cc',
         'event_recorder.h',
         'event_recorder_stubs.cc',
         'field_trial.cc',
         'field_trial.h',
         'file_path.cc',
         'file_path.h',
         'file_util.cc',
         'file_util.h',
@@ skipping 533 matching lines @@
             # Linux has an implementation of idle_timer, but it's unclear
             # if we want it yet, so leave it 'unported' for now.
             'idletimer_unittest.cc',
             'worker_pool_linux_unittest.cc',
           ],
           'dependencies': [
             '../build/linux/system.gyp:gtk',
             '../build/linux/system.gyp:nss',
           ],
         }],
-        ['OS == "mac"', {
-          'sources!': [
-            'directory_watcher_unittest.cc',
-          ],
-        }, {  # OS != "mac"
+        ['OS != "mac"', {
           'sources!': [
             'mac_util_unittest.cc',
           ],
         }],
         # This is needed to trigger the dll copy step on windows.
         # TODO(mark): This should not be necessary.
         ['OS == "win"', {
           'dependencies': [
             '../third_party/icu38/icu38.gyp:icudata',
           ],
@@ skipping 52 matching lines @@
           'target_name': 'debug_message',
           'type': 'executable',
           'sources': [
             'debug_message.cc',
           ],
         },
       ],
     }],
   ],
 }