Remove voe::Statistics.

voice_engine/voe_base_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.
  */
 
@@ skipping 86 matching lines @@
   int32_t TerminateInternal();
 
   void GetPlayoutData(int sample_rate, size_t number_of_channels,
                       size_t number_of_frames, bool feed_data_to_apm,
                       void* audio_data, int64_t* elapsed_time_ms,
                       int64_t* ntp_time_ms);
 
   // Initialize channel by setting Engine Information then initializing
   // channel.
   int InitializeChannel(voe::ChannelOwner* channel_owner);
-  rtc::CriticalSection callbackCritSect_;
   rtc::scoped_refptr<AudioDecoderFactory> decoder_factory_;
 
   AudioFrame audioFrame_;
   voe::SharedData* shared_;
 };
 
 }  // namespace webrtc
 
 #endif  // VOICE_ENGINE_VOE_BASE_IMPL_H_