Replace test_support_main by test_main and get rid of test_support_main_threaded_mac

webrtc/tools/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("//third_party/protobuf/proto_library.gni")
 import("../build/webrtc.gni")
@@ skipping 253 matching lines @@
 
     if (!build_with_chromium && is_clang) {
       # Suppress warnings from the Chromium Clang plugin (bugs.webrtc.org/163).
       suppressed_configs += [ "//build/config/clang:find_bad_constructs" ]
     }
 
     deps = [
       ":command_line_parser",
       ":frame_editing_lib",
       ":video_quality_analysis",
-      "../test:test_support_main",
+      "../test:test_main",
       "//testing/gtest",
     ]
 
     data = tools_unittests_resources
     if (is_android) {
       deps += [ "//testing/android/native_test:native_test_support" ]
       shard_timeout = 900
     }
     if (is_ios) {
       deps += [ ":tools_unittests_bundle_data" ]
@@ skipping 10 matching lines @@
       ]
       outputs = [
         "$root_build_dir/{{source_file_part}}",
       ]
       deps = [
         "../logging:rtc_event_log_proto",
       ]
     }
   }
 }