Introduced new scheme for controlling the functionality inside the audio processing module

webrtc/media/engine/webrtcvoiceengine.cc

Index: webrtc/media/engine/webrtcvoiceengine.cc
diff --git a/webrtc/media/engine/webrtcvoiceengine.cc b/webrtc/media/engine/webrtcvoiceengine.cc
index d0ca9aea617322719caf5cf0184c92128e25cb07..43b006b0f69278fda89cb369f3cbd3cbaeb99a7b 100644
--- a/webrtc/media/engine/webrtcvoiceengine.cc
+++ b/webrtc/media/engine/webrtcvoiceengine.cc
@@ -872,8 +872,9 @@ bool WebRtcVoiceEngine::ApplyOptions(const AudioOptions& options_in) {
 
   LOG(LS_INFO) << "Level control: "
                << (!!level_control_ ? *level_control_ : -1);
+  webrtc::AudioProcessing::Config apm_config;
   if (level_control_) {
-    config.Set<webrtc::LevelControl>(new webrtc::LevelControl(*level_control_));
+    apm_config.level_controller.enabled = *level_control_;
   }
 
   // We check audioproc for the benefit of tests, since FakeWebRtcVoiceEngine
@@ -881,6 +882,8 @@ bool WebRtcVoiceEngine::ApplyOptions(const AudioOptions& options_in) {
   webrtc::AudioProcessing* audioproc = voe_wrapper_->base()->audio_processing();
   if (audioproc) {
     audioproc->SetExtraOptions(config);
+    RTC_DCHECK(apm_config.Validate());
+    RTC_DCHECK(audioproc->ApplyConfig(apm_config));

[hlundin-webrtc, 2016/09/06 08:56:03]

Using a DCHECK here means that ApplyConfig is only called in debug mode. Not
your intention, I suppose.

[peah-webrtc, 2016/09/07 05:42:59]

Ah, thanks!

Done.

   }
 
   if (options.recording_sample_rate) {