Remove VoEVolumeControl interface.

webrtc/voice_engine/transmit_mixer.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.
  */
 
@@ skipping 62 matching lines @@
     int32_t EncodeAndSend();
     // Used by the Chrome to pass the recording data to the specific VoE
     // channels for encoding and sending to the network.
     void EncodeAndSend(const int voe_channels[], size_t number_of_voe_channels);
 
     // Must be called on the same thread as PrepareDemux().
     uint32_t CaptureLevel() const;
 
     int32_t StopSend();
 
-    // VoEVolumeControl
-    int SetMute(bool enable);
-
-    bool Mute() const;
-
+    // TODO(solenberg): Remove, once AudioMonitor is gone.
     int8_t AudioLevel() const;
 
     // 'virtual' to allow mocking.
     virtual int16_t AudioLevelFullRange() const;
 
     bool IsRecordingCall();
 
     bool IsRecordingMic();
 
     int StartPlayingFileAsMicrophone(const char* fileName,
@@ skipping 122 matching lines @@
 #if WEBRTC_VOICE_ENGINE_TYPING_DETECTION
     MonitorModule<TransmitMixer> _monitorModule;
     webrtc::TypingDetection _typingDetection;
     bool _typingNoiseWarningPending = false;
     bool _typingNoiseDetected = false;
 #endif
 
     int _instanceId = 0;
     bool _mixFileWithMicrophone = false;
     uint32_t _captureLevel = 0;
-    bool _mute = false;
     bool stereo_codec_ = false;
     bool swap_stereo_channels_ = false;
 };
 }  // namespace voe
 }  // namespace webrtc
 
 #endif  // WEBRTC_VOICE_ENGINE_TRANSMIT_MIXER_H