Conversational Speech tool, rtc_test target replaced with entry in modules_unittests

webrtc/modules/audio_processing/test/conversational_speech/BUILD.gn

 # Copyright (c) 2017 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("//webrtc/webrtc.gni")
 
 group("conversational_speech") {
   testonly = true
   deps = [
     ":conversational_speech_generator",
-    ":conversational_speech_generator_unittest",
   ]
 }
 
 rtc_executable("conversational_speech_generator") {
   testonly = true
   sources = [
     "generator.cc",
   ]
   deps = [
     ":lib",
     "//third_party/gflags",
     "//webrtc/base:rtc_base_approved",
     "//webrtc/test:test_support",
   ]
-  visibility = [ ":*" ]  # Only targets in this file can depend on this.
-}  # bin
+}
 
 rtc_static_library("lib") {
   testonly = true
   sources = [
     "config.cc",
     "config.h",
     "timing.cc",
     "timing.h",
   ]
   deps = [
     "//webrtc/base:rtc_base_approved",
   ]
   visibility = [ ":*" ]  # Only targets in this file can depend on this.
-}  # lib
+}
 
-rtc_test("conversational_speech_generator_unittest") {
+rtc_source_set("unittest") {
   testonly = true
-  deps = [
-    ":lib",
-    "//testing/gtest",
-    "//webrtc//base:rtc_base_tests_main",
-    "//webrtc/test:test_support",
-  ]
   sources = [
     "generator_unittest.cc",
   ]
-  visibility = [ ":*" ]  # Only targets in this file can depend on this.
+  deps = [
+    ":lib",
+    "//testing/gmock",
+    "//testing/gtest",
+    "//webrtc/test:test_support",
+  ]
 }