WIP: Move the creation of AudioCodecFactory into PeerConnectionFactory.

webrtc/media/base/mediaengine.h

Index: webrtc/media/base/mediaengine.h
diff --git a/webrtc/media/base/mediaengine.h b/webrtc/media/base/mediaengine.h
index 4c7d62a1e4b7bc99503c3ce8885d4c80a276295a..dca53a1cb5d330214318198907a33850050a5340 100644
--- a/webrtc/media/base/mediaengine.h
+++ b/webrtc/media/base/mediaengine.h
@@ -33,6 +33,7 @@
 #endif
 
 namespace webrtc {
+class AudioDecoderFactory;
 class AudioDeviceModule;
 class Call;
 }
@@ -124,7 +125,10 @@ class MediaEngineFactory {
 template<class VOICE, class VIDEO>
 class CompositeMediaEngine : public MediaEngineInterface {
  public:
-  explicit CompositeMediaEngine(webrtc::AudioDeviceModule* adm) : voice_(adm) {}
+  explicit CompositeMediaEngine(
+      webrtc::AudioDeviceModule* adm,
+      std::shared_ptr<webrtc::AudioDecoderFactory> audio_decoder_factory)
+      : voice_(adm, std::move(audio_decoder_factory)) {}
   virtual ~CompositeMediaEngine() {}
   virtual bool Init() {
     video_.Init();