MuteSource Audio During Full Screen Cast

media/audio/win/core_audio_util_win.cc

Index: media/audio/win/core_audio_util_win.cc
diff --git a/media/audio/win/core_audio_util_win.cc b/media/audio/win/core_audio_util_win.cc
index d00d3608339d6497862905a013ff9542eb01ef8a..cb21af6bb8936a8e720e3032eb4f3bc8a889272c 100644
--- a/media/audio/win/core_audio_util_win.cc
+++ b/media/audio/win/core_audio_util_win.cc
@@ -747,7 +747,8 @@ HRESULT CoreAudioUtil::GetPreferredAudioParameters(const std::string& device_id,
   if (device_id == AudioDeviceDescription::kDefaultDeviceId) {
     device = CoreAudioUtil::CreateDefaultDevice(
         is_output_device ? eRender : eCapture, eConsole);
-  } else if (device_id == AudioDeviceDescription::kLoopbackInputDeviceId) {
+  } else if (device_id == AudioDeviceDescription::kLoopbackInputDeviceId ||
+      device_id == AudioDeviceDescription::kLoopbackWithMuteDeviceId) {
     DCHECK(!is_output_device);
     device = CoreAudioUtil::CreateDefaultDevice(eRender, eConsole);
   } else if (device_id == AudioDeviceDescription::kCommunicationsDeviceId) {