Reland Move fake_audio_device to its own target.

webrtc/test/BUILD.gn

Index: webrtc/test/BUILD.gn
diff --git a/webrtc/test/BUILD.gn b/webrtc/test/BUILD.gn
index 07ffbee41238236d6923e967897ba1541e59e9a9..12eb3cacc32090d17a5a494a86b4a70989f1b986 100644
--- a/webrtc/test/BUILD.gn
+++ b/webrtc/test/BUILD.gn
@@ -333,6 +333,22 @@ rtc_source_set("direct_transport") {
   ]
 }
 
+rtc_source_set("fake_audio_device") {
+  testonly = true
+  sources = [
+    "fake_audio_device.cc",
+    "fake_audio_device.h",
+  ]
+  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 = [
+    "../base:rtc_base_approved",
+    "../modules/audio_device:audio_device",
+  ]
+}
+
 rtc_source_set("test_common") {
   testonly = true
   sources = [
@@ -346,8 +362,6 @@ rtc_source_set("test_common") {
     "drifting_clock.h",
     "encoder_settings.cc",
     "encoder_settings.h",
-    "fake_audio_device.cc",
-    "fake_audio_device.h",
     "fake_decoder.cc",
     "fake_decoder.h",
     "fake_encoder.cc",
@@ -379,13 +393,13 @@ rtc_source_set("test_common") {
 
   deps = [
     ":direct_transport",
+    ":fake_audio_device",
     ":rtp_test_utils",
     ":test_support",
     "..:webrtc_common",
     "../audio",
     "../base:rtc_base_approved",
     "../call",
-    "../modules/audio_device:mock_audio_device",
     "../modules/audio_mixer:audio_mixer_impl",
     "../modules/audio_processing",
     "../video",