Allow an external audio processing module to be used in WebRTC

webrtc/ortc/ortcfactory.cc

Index: webrtc/ortc/ortcfactory.cc
diff --git a/webrtc/ortc/ortcfactory.cc b/webrtc/ortc/ortcfactory.cc
index bf34f134fb01ac3ebb85d83f83d31c0fad3787cb..612e55d9048b77960ce7dd85528b6bb93fe82642 100644
--- a/webrtc/ortc/ortcfactory.cc
+++ b/webrtc/ortc/ortcfactory.cc
@@ -27,6 +27,7 @@
 #include "webrtc/base/logging.h"
 #include "webrtc/logging/rtc_event_log/rtc_event_log.h"
 #include "webrtc/media/base/mediaconstants.h"
+#include "webrtc/modules/audio_processing/include/audio_processing.h"
 #include "webrtc/ortc/ortcrtpreceiveradapter.h"
 #include "webrtc/ortc/ortcrtpsenderadapter.h"
 #include "webrtc/ortc/rtpparametersconversion.h"
@@ -544,9 +545,9 @@ OrtcFactory::CreateMediaEngine_w() {
   // Note that |adm_| may be null, in which case the platform-specific default
   // AudioDeviceModule will be used.
   return std::unique_ptr<cricket::MediaEngineInterface>(
-      cricket::WebRtcMediaEngineFactory::Create(adm_, audio_encoder_factory_,
-                                                audio_decoder_factory_, nullptr,
-                                                nullptr, nullptr));
+      cricket::WebRtcMediaEngineFactory::Create(
+          adm_, audio_encoder_factory_, audio_decoder_factory_, nullptr,
+          nullptr, nullptr, webrtc::AudioProcessing::Create()));
 }
 
 }  // namespace webrtc