Audio output debug recording.

media/audio/BUILD.gn

Index: media/audio/BUILD.gn
diff --git a/media/audio/BUILD.gn b/media/audio/BUILD.gn
index 295208878f7b8cf935e9de9780313223bee9df96..28623ccb390aed948f721b849d1f5cb19098f5f1 100644
--- a/media/audio/BUILD.gn
+++ b/media/audio/BUILD.gn
@@ -54,6 +54,10 @@ source_set("audio") {
   visibility = [ "//media/*" ]
   sources = [
     "agc_audio_stream.h",
+    "audio_debug_recording_helper.cc",
+    "audio_debug_recording_helper.h",
+    "audio_debug_recording_manager.cc",
+    "audio_debug_recording_manager.h",
     "audio_device_description.cc",
     "audio_device_description.h",
     "audio_device_name.cc",
@@ -303,6 +307,8 @@ static_library("test_support") {
 source_set("unit_tests") {
   testonly = true
   sources = [
+    "audio_debug_recording_helper_unittest.cc",
+    "audio_debug_recording_manager_unittest.cc",
     "audio_input_controller_unittest.cc",
     "audio_input_device_unittest.cc",
     "audio_input_unittest.cc",