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

webrtc/media/base/fakemediaengine.h

Index: webrtc/media/base/fakemediaengine.h
diff --git a/webrtc/media/base/fakemediaengine.h b/webrtc/media/base/fakemediaengine.h
index fc59fa7d7d889c20b755271391df9bdc79019a5a..c0aacfce5c19e6535c169096d859d3837062b3ee 100644
--- a/webrtc/media/base/fakemediaengine.h
+++ b/webrtc/media/base/fakemediaengine.h
@@ -765,6 +765,8 @@ class FakeBaseEngine {
 class FakeVoiceEngine : public FakeBaseEngine {
  public:
   FakeVoiceEngine(webrtc::AudioDeviceModule* adm,
+                  const rtc::scoped_refptr<webrtc::AudioEncoderFactory>&
+                      audio_encoder_factory,
                   const rtc::scoped_refptr<webrtc::AudioDecoderFactory>&
                       audio_decoder_factory,
                   rtc::scoped_refptr<webrtc::AudioMixer> audio_mixer) {
@@ -876,6 +878,7 @@ class FakeMediaEngine :
   FakeMediaEngine()
       : CompositeMediaEngine<FakeVoiceEngine, FakeVideoEngine>(nullptr,
                                                                nullptr,
+                                                               nullptr,
                                                                nullptr) {}
   virtual ~FakeMediaEngine() {}