Compile rtc_base_objc and rtc_api_objc for Mac

webrtc/webrtc_tests.gypi

 # Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
 #
 # Use of this source code is governed by a BSD-style license
 # that can be found in the LICENSE file in the root of the source
 # tree. An additional intellectual property rights grant can be found
 # in the file PATENTS.  All contributing project authors may
 # be found in the AUTHORS file in the root of the source tree.
 {
   'targets': [
     {
@@ skipping 14 matching lines @@
         'sound/sound.gyp:rtc_sound',
         '<(DEPTH)/testing/gtest.gyp:gtest',
         '<(DEPTH)/testing/gmock.gyp:gmock',
       ],
       'conditions': [
         ['OS=="android"', {
           'dependencies': [
             '<(DEPTH)/testing/android/native_test.gyp:native_test_native_code',
           ],
         }],
-        ['OS=="ios"', {
+        ['OS=="ios" or OS=="mac"', {
           'dependencies': [
             'api/api_tests.gyp:rtc_api_objc_tests',
           ]
         }]
       ],
     },
     {
       'target_name': 'webrtc_tests',
       'type': 'none',
       'dependencies': [
@@ skipping 371 matching lines @@
             'build/isolate.gypi',
           ],
           'sources': [
             'webrtc_perf_tests.isolate',
           ],
         },
       ],
     }],
   ],
 }