Remove VoEExternalMedia interface.

webrtc/voice_engine/transmit_mixer.h

Index: webrtc/voice_engine/transmit_mixer.h
diff --git a/webrtc/voice_engine/transmit_mixer.h b/webrtc/voice_engine/transmit_mixer.h
index 13ddaa54921fdea604acd79460c4519599b76a8b..35003848d1ef56e1141b5c265d1531f5066c9462 100644
--- a/webrtc/voice_engine/transmit_mixer.h
+++ b/webrtc/voice_engine/transmit_mixer.h
@@ -35,8 +35,6 @@ namespace webrtc {
 
 class AudioProcessing;
 class ProcessThread;
-class VoEExternalMedia;
-class VoEMediaProcess;
 
 namespace voe {
 
@@ -83,13 +81,6 @@ public:
 
     int32_t StopSend();
 
-    // VoEExternalMedia
-    int RegisterExternalMediaProcessing(VoEMediaProcess* object,
-                                        ProcessingTypes type);
-    int DeRegisterExternalMediaProcessing(ProcessingTypes type);
-
-    int GetMixingFrequency();
-
     // VoEVolumeControl
     int SetMute(bool enable);
 
@@ -228,8 +219,6 @@ private:
     int _instanceId;
     bool _mixFileWithMicrophone;
     uint32_t _captureLevel;
-    VoEMediaProcess* external_postproc_ptr_;
-    VoEMediaProcess* external_preproc_ptr_;
     bool _mute;
     bool stereo_codec_;
     bool swap_stereo_channels_;