Revert of Removing unused audio device tests

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("../../webrtc.gni")
 
@@ skipping 299 matching lines @@
     sources = [
       "include/mock_audio_device.h",
       "include/mock_audio_transport.h",
     ]
     deps = [
       ":audio_device",
       "../../test:test_support",
     ]
     all_dependent_configs = [ ":mock_audio_device_config" ]
   }
+
+  if (!is_ios) {
+    # These tests do not work on ios, see
+    # https://bugs.chromium.org/p/webrtc/issues/detail?id=4755
+    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",
+        "../rtp_rtcp",
+        "../utility",
+        "//testing/gtest",
+      ]
+      public_configs = [ ":audio_device_config" ]
+    }
+  }
 }
 
 if (!build_with_chromium && is_android) {
   android_library("audio_device_java") {
     java_files = [
       "android/java/src/org/webrtc/voiceengine/BuildInfo.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioEffects.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioManager.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioRecord.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioTrack.java",
       "android/java/src/org/webrtc/voiceengine/WebRtcAudioUtils.java",
     ]
     deps = [
       "//webrtc/base:base_java",
     ]
   }
 }