Remove the VoiceEngineObserver callback interface.

voice_engine/shared_data.cc

 /*
  *  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 12 matching lines @@
 
 SharedData::SharedData()
     : _instanceId(++_gInstanceCounter),
       _channelManager(_gInstanceCounter),
       _engineStatistics(_gInstanceCounter),
       _audioDevicePtr(NULL),
       _moduleProcessThreadPtr(ProcessThread::Create("VoiceProcessThread")),
       encoder_queue_("AudioEncoderQueue") {
   Trace::CreateTrace();
   if (TransmitMixer::Create(_transmitMixerPtr, _gInstanceCounter) == 0) {
-    _transmitMixerPtr->SetEngineInformation(*_moduleProcessThreadPtr,
-                                            _engineStatistics, _channelManager);
+    _transmitMixerPtr->SetEngineInformation(&_channelManager);
   }
 }
 
 SharedData::~SharedData()
 {
     TransmitMixer::Destroy(_transmitMixerPtr);
     if (_audioDevicePtr) {
         _audioDevicePtr->Release();
     }
     _moduleProcessThreadPtr->Stop();
@@ skipping 50 matching lines @@
 }
 
 void SharedData::SetLastError(int32_t error, TraceLevel level,
                               const char* msg) const {
   _engineStatistics.SetLastError(error, level, msg);
 }
 
 }  // namespace voe
 
 }  // namespace webrtc