Reland "SelectSettings algorithm for audio constraints."

content/renderer/media/media_stream_audio_processor_options.cc

Index: content/renderer/media/media_stream_audio_processor_options.cc
diff --git a/content/renderer/media/media_stream_audio_processor_options.cc b/content/renderer/media/media_stream_audio_processor_options.cc
index eafc8ec50d494a6567b1065e171b6f8422a605b8..401350e860614d36970e9176c7a29087bb922db5 100644
--- a/content/renderer/media/media_stream_audio_processor_options.cc
+++ b/content/renderer/media/media_stream_audio_processor_options.cc
@@ -275,6 +275,17 @@ std::string MediaAudioConstraints::GetGoogArrayGeometry() const {
   return "";
 }
 
+AudioProcessingProperties::AudioProcessingProperties() = default;
+AudioProcessingProperties::AudioProcessingProperties(
+    const AudioProcessingProperties& other) = default;
+AudioProcessingProperties& AudioProcessingProperties::operator=(
+    const AudioProcessingProperties& other) = default;
+AudioProcessingProperties::AudioProcessingProperties(
+    AudioProcessingProperties&& other) = default;
+AudioProcessingProperties& AudioProcessingProperties::operator=(
+    AudioProcessingProperties&& other) = default;
+AudioProcessingProperties::~AudioProcessingProperties() = default;
+
 EchoInformation::EchoInformation()
     : delay_stats_time_ms_(0),
       echo_frames_received_(false),