Replace test_support_main by test_main and get rid of test_support_main_threaded_mac

webrtc/modules/audio_device/BUILD.gn

 # Copyright (c) 2014 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.
 
 import("../../build/webrtc.gni")
 
@@ skipping 264 matching lines @@
   rtc_executable("audio_device_tests") {
     testonly = true
     sources = [
       "test/audio_device_test_api.cc",
       "test/audio_device_test_defines.h",
     ]
     deps = [
       ":audio_device",
       "../..:webrtc_common",
       "../../system_wrappers",
+      "../../test:test_main",
       "../../test:test_support",
-      "../../test:test_support_main",
       "../rtp_rtcp",
       "../utility",
       "//testing/gtest",
     ]
     public_configs = [ ":audio_device_config" ]
   }
 }