Remove mutable from rtc::CriticalSection members.

webrtc/modules/video_coding/video_coding_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 @@
   int64_t TimeUntilNextProcess();
   int32_t Process();
 
  private:
   void SetEncoderParameters(EncoderParameters params)
       EXCLUSIVE_LOCKS_REQUIRED(encoder_crit_);
 
   Clock* const clock_;
 
   rtc::scoped_ptr<CriticalSectionWrapper> process_crit_sect_;
-  mutable rtc::CriticalSection encoder_crit_;
+  rtc::CriticalSection encoder_crit_;
   VCMGenericEncoder* _encoder;
   VCMEncodedFrameCallback _encodedFrameCallback GUARDED_BY(encoder_crit_);
   media_optimization::MediaOptimization _mediaOpt;
   VCMSendStatisticsCallback* _sendStatsCallback GUARDED_BY(process_crit_sect_);
   VCMCodecDataBase _codecDataBase GUARDED_BY(encoder_crit_);
   bool frame_dropper_enabled_ GUARDED_BY(encoder_crit_);
   VCMProcessTimer _sendStatsTimer;
 
   // Must be accessed on the construction thread of VideoSender.
   VideoCodec current_codec_;
@@ skipping 96 matching lines @@
   VCMCodecDataBase _codecDataBase GUARDED_BY(_receiveCritSect);
   VCMProcessTimer _receiveStatsTimer;
   VCMProcessTimer _retransmissionTimer;
   VCMProcessTimer _keyRequestTimer;
   QpParser qp_parser_;
 };
 
 }  // namespace vcm
 }  // namespace webrtc
 #endif  // WEBRTC_MODULES_VIDEO_CODING_VIDEO_CODING_IMPL_H_