WIP: Move the creation of AudioCodecFactory into PeerConnectionFactory.

webrtc/modules/audio_coding/neteq/neteq_impl.h

Index: webrtc/modules/audio_coding/neteq/neteq_impl.h
diff --git a/webrtc/modules/audio_coding/neteq/neteq_impl.h b/webrtc/modules/audio_coding/neteq/neteq_impl.h
index a707f2565c5db31261b84e3ca136fdf614f45406..49ee02494ec9a39a764088ecfb7bd313d8a4c0e9 100644
--- a/webrtc/modules/audio_coding/neteq/neteq_impl.h
+++ b/webrtc/modules/audio_coding/neteq/neteq_impl.h
@@ -72,7 +72,9 @@ class NetEqImpl : public webrtc::NetEq {
     // before sending the struct to the NetEqImpl constructor. However, there
     // are dependencies between some of the classes inside the struct, so
     // swapping out one may make it necessary to re-create another one.
-    explicit Dependencies(const NetEq::Config& config);
+    explicit Dependencies(
+        const NetEq::Config& config,
+        std::shared_ptr<AudioDecoderFactory> decoder_factory);
     ~Dependencies();
 
     std::unique_ptr<TickTimer> tick_timer;