MediaStreamTrack: Add echo-cancellation and device-id to getSettings

content/renderer/media/external_media_stream_audio_source.cc

Index: content/renderer/media/external_media_stream_audio_source.cc
diff --git a/content/renderer/media/external_media_stream_audio_source.cc b/content/renderer/media/external_media_stream_audio_source.cc
index 7c2977c2907c46249730468bb2f63b81ffbe75a3..936e1c2153edd2a22d48903dccf73a91de1f258c 100644
--- a/content/renderer/media/external_media_stream_audio_source.cc
+++ b/content/renderer/media/external_media_stream_audio_source.cc
@@ -30,6 +30,12 @@ ExternalMediaStreamAudioSource::~ExternalMediaStreamAudioSource() {
   EnsureSourceIsStopped();
 }
 
+void ExternalMediaStreamAudioSource::getSettings(
+    blink::WebMediaStreamTrack::Settings& settings) {
+  // This source type does not support echo cancellation.
+  settings.setEchoCancellation(false);
+}
+
 bool ExternalMediaStreamAudioSource::EnsureSourceIsStarted() {
   DCHECK(thread_checker_.CalledOnValidThread());
   if (was_started_)