Remove VoEExternalMedia interface.

webrtc/voice_engine/voe_external_media_impl.h

-/*
- *  Copyright (c) 2012 The WebRTC project authors. All Rights Reserved.
- *
- *  Use of this source code is governed by a BSD-style license
- *  that can be found in the LICENSE file in the root of the source
- *  tree. An additional intellectual property rights grant can be found
- *  in the file PATENTS.  All contributing project authors may
- *  be found in the AUTHORS file in the root of the source tree.
- */
-
-#ifndef WEBRTC_VOICE_ENGINE_VOE_EXTERNAL_MEDIA_IMPL_H
-#define WEBRTC_VOICE_ENGINE_VOE_EXTERNAL_MEDIA_IMPL_H
-
-#include "webrtc/voice_engine/include/voe_external_media.h"
-
-#include "webrtc/voice_engine/shared_data.h"
-
-namespace webrtc {
-
-class VoEExternalMediaImpl : public VoEExternalMedia {
- public:
-  int RegisterExternalMediaProcessing(int channel,
-                                      ProcessingTypes type,
-                                      VoEMediaProcess& processObject) override;
-
-  int DeRegisterExternalMediaProcessing(int channel,
-                                        ProcessingTypes type) override;
-
-  int GetAudioFrame(int channel,
-                    int desired_sample_rate_hz,
-                    AudioFrame* frame) override;
-
-  int SetExternalMixing(int channel, bool enable) override;
-
- protected:
-  VoEExternalMediaImpl(voe::SharedData* shared);
-  ~VoEExternalMediaImpl() override;
-
- private:
-  voe::SharedData* shared_;
-};
-
-}  // namespace webrtc
-
-#endif  // WEBRTC_VOICE_ENGINE_VOE_EXTERNAL_MEDIA_IMPL_H