Remove mutable from rtc::CriticalSections.

webrtc/voice_engine/shared_data.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 45 matching lines @@
     int NumOfPlayingChannels();
 
     // Convenience methods for calling statistics().SetLastError().
     void SetLastError(int32_t error) const;
     void SetLastError(int32_t error, TraceLevel level) const;
     void SetLastError(int32_t error, TraceLevel level,
                       const char* msg) const;
 
 protected:
     const uint32_t _instanceId;
-    mutable rtc::CriticalSection _apiCritPtr;
+    rtc::CriticalSection _apiCritPtr;
     ChannelManager _channelManager;
     Statistics _engineStatistics;
     AudioDeviceModule* _audioDevicePtr;
     OutputMixer* _outputMixerPtr;
     TransmitMixer* _transmitMixerPtr;
     rtc::scoped_ptr<AudioProcessing> audioproc_;
     rtc::scoped_ptr<ProcessThread> _moduleProcessThreadPtr;
 
     AudioDeviceModule::AudioLayer _audioDeviceLayer;
 
     SharedData(const Config& config);
     virtual ~SharedData();
 };
 
 }  // namespace voe
 
 }  // namespace webrtc
 #endif // WEBRTC_VOICE_ENGINE_SHARED_DATA_H