Remove mutable from rtc::CriticalSections.

webrtc/video/vie_remb.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 40 matching lines @@
   // estimate has decreased or if no RTCP REMB packet has been sent for
   // a certain time interval.
   // Implements RtpReceiveBitrateUpdate.
   virtual void OnReceiveBitrateChanged(const std::vector<unsigned int>& ssrcs,
                                        unsigned int bitrate);
 
  private:
   typedef std::list<RtpRtcp*> RtpModules;
 
   Clock* const clock_;
-  mutable rtc::CriticalSection list_crit_;
+  rtc::CriticalSection list_crit_;
 
   // The last time a REMB was sent.
   int64_t last_remb_time_;
   unsigned int last_send_bitrate_;
 
   // All RtpRtcp modules to include in the REMB packet.
   RtpModules receive_modules_;
 
   // All modules that can send REMB RTCP.
   RtpModules rtcp_sender_;
 
   // The last bitrate update.
   unsigned int bitrate_;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_REMB_H_