Add support for echoCancellation and deviceId to MediaStreamTrack.getSettings

third_party/WebKit/Source/platform/mediastream/MediaStreamSource.cpp

 /*
  * Copyright (C) 2012 Google Inc. All rights reserved.
  *
  * Redistribution and use in source and binary forms, with or without
  * modification, are permitted provided that the following conditions
  * are met:
  *
  * 1. Redistributions of source code must retain the above copyright
  *    notice, this list of conditions and the following disclaimer.
  * 2. Redistributions in binary form must reproduce the above copyright
@@ skipping 90 matching lines @@
   MutexLocker locker(audio_consumers_lock_);
   auto it = audio_consumers_.find(consumer);
   if (it == audio_consumers_.end())
     return false;
   audio_consumers_.erase(it);
   return true;
 }
 
 void MediaStreamSource::GetSettings(WebMediaStreamTrack::Settings& settings) {
   settings.device_id = Id();
+
+  if (echo_cancellation_.has_value())
+    settings.echo_cancellation = *echo_cancellation_;
 }
 
 void MediaStreamSource::SetAudioFormat(size_t number_of_channels,
                                        float sample_rate) {
   DCHECK(requires_consumer_);
   MutexLocker locker(audio_consumers_lock_);
   for (AudioDestinationConsumer* consumer : audio_consumers_)
     consumer->SetFormat(number_of_channels, sample_rate);
 }
 
 void MediaStreamSource::ConsumeAudio(AudioBus* bus, size_t number_of_frames) {
   DCHECK(requires_consumer_);
   MutexLocker locker(audio_consumers_lock_);
   for (AudioDestinationConsumer* consumer : audio_consumers_)
     consumer->ConsumeAudio(bus, number_of_frames);
 }
 
 DEFINE_TRACE(MediaStreamSource) {
   visitor->Trace(observers_);
 }
 
 }  // namespace blink