Give a CFRunLoop to the IO message loop type on Mac OS X.

base/base.gyp

 # Copyright (c) 2011 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': [
     'base.gypi',
@@ skipping 135 matching lines @@
         'memory/mru_cache_unittest.cc',
         'memory/ref_counted_unittest.cc',
         'memory/scoped_ptr_unittest.cc',
         'memory/scoped_vector_unittest.cc',
         'memory/singleton_unittest.cc',
         'memory/weak_ptr_unittest.cc',
         'message_loop_proxy_impl_unittest.cc',
         'message_loop_unittest.cc',
         'message_pump_glib_unittest.cc',
         'message_pump_libevent_unittest.cc',
+        'message_pump_mac_unittest.cc',
         'metrics/field_trial_unittest.cc',
         'metrics/histogram_unittest.cc',
         'metrics/stats_table_unittest.cc',
         'observer_list_unittest.cc',
         'path_service_unittest.cc',
         'pickle_unittest.cc',
         'platform_file_unittest.cc',
         'pr_time_unittest.cc',
         'process_util_unittest.cc',
         'process_util_unittest_mac.h',
@@ skipping 118 matching lines @@
         }, {  # OS != "win"
           'sources/': [
             ['exclude', '^win/'],
           ],
           'sources!': [
             'debug/trace_event_win_unittest.cc',
             'time_win_unittest.cc',
             'win/win_util_unittest.cc',
           ],
         }],
+        ['OS == "mac"', {
+          'sources!': [
+            'message_pump_libevent_unittest.cc',
+          ],
+        }, {  # OS != "mac"
+          'sources!': [
+            'message_pump_mac_unittest.cc',
+          ],
+        }],
       ],
     },
     {
       'target_name': 'test_support_base',
       'type': 'static_library',
       'dependencies': [
         'base',
         'base_static',
         'base_i18n',
         '../testing/gmock.gyp:gmock',
@@ skipping 90 matching lines @@
       ],
     }],
   ],
 }
 
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