GN: New conventions, default target and refactorings

webrtc/modules/audio_processing/BUILD.gn

Index: webrtc/modules/audio_processing/BUILD.gn
diff --git a/webrtc/modules/audio_processing/BUILD.gn b/webrtc/modules/audio_processing/BUILD.gn
index bd6adf654293c796cc5a59bd5d16e62416e5e0fb..f55dd063f00429dea1d9bdf45150503359e01321 100644
--- a/webrtc/modules/audio_processing/BUILD.gn
+++ b/webrtc/modules/audio_processing/BUILD.gn
@@ -313,6 +313,26 @@ if (rtc_build_with_neon) {
 }
 
 if (rtc_include_tests) {
+  group("audio_processing_tests") {
+    testonly = true
+    public_deps = [
+      ":audioproc_f",
+      ":audioproc_test_utils",
+      ":click_annotate",
+      ":nonlinear_beamformer_test",
+      ":transient_suppression_test",
+      ":unpack_aecdump",
+    ]
+
+    if (rtc_enable_intelligibility_enhancer) {
+      public_deps += [ ":intelligibility_proc" ]
+    }
+
+    if (rtc_enable_protobuf) {
+      public_deps += [ ":audioproc_unittest_proto" ]
+    }
+  }
+
   rtc_executable("unpack_aecdump") {
     testonly = true
     sources = [