Injectable audio encoders: Moved audio encoder, factory and builtin factory to api/.

webrtc/api/peerconnectioninterface.h

Index: webrtc/api/peerconnectioninterface.h
diff --git a/webrtc/api/peerconnectioninterface.h b/webrtc/api/peerconnectioninterface.h
index d30834dc5b4d91fda12e7afbaa354002e1b28995..5fab520406279d86fbe25864e3753d50d65e39b8 100644
--- a/webrtc/api/peerconnectioninterface.h
+++ b/webrtc/api/peerconnectioninterface.h
@@ -73,6 +73,9 @@
 #include <vector>
 
 #include "webrtc/api/audio_codecs/audio_decoder_factory.h"
+#include "webrtc/api/audio_codecs/audio_encoder_factory.h"
+// TODO(ossu): Remove this once downstream projects have been updated.

[kwiberg-webrtc, 2017/04/12 09:59:33]

Sorry, it's my fault that you have to do this...

[ossu, 2017/04/12 10:05:27]

Yeah, I realized that had we put the stubs in the proper header files from the
start, it would have JustWorked(tm) when I updated them.

This should be pretty quick. Any downstream projects would've required changing
with this move anyways.

+#include "webrtc/api/audio_codecs/builtin_audio_encoder_factory.h"
 #include "webrtc/api/datachannelinterface.h"
 #include "webrtc/api/dtmfsenderinterface.h"
 #include "webrtc/api/jsep.h"
@@ -91,9 +94,6 @@
 #include "webrtc/base/sslstreamadapter.h"
 #include "webrtc/media/base/mediachannel.h"
 #include "webrtc/media/base/videocapturer.h"
-#include "webrtc/modules/audio_coding/codecs/audio_encoder_factory.h"
-// TODO(ossu): Remove this once downstream projects have been updated.
-#include "webrtc/modules/audio_coding/codecs/builtin_audio_encoder_factory.h"
 #include "webrtc/p2p/base/portallocator.h"
 
 namespace rtc {