Remove mutable from rtc::CriticalSections.

webrtc/video/vie_encoder.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 140 matching lines @@
   void TraceFrameDropStart() EXCLUSIVE_LOCKS_REQUIRED(data_cs_);
   void TraceFrameDropEnd() EXCLUSIVE_LOCKS_REQUIRED(data_cs_);
 
   const uint32_t number_of_cores_;
 
   const rtc::scoped_ptr<VideoProcessing> vp_;
   const rtc::scoped_ptr<QMVideoSettingsCallback> qm_callback_;
   const rtc::scoped_ptr<VideoCodingModule> vcm_;
   rtc::scoped_refptr<PayloadRouter> send_payload_router_;
 
-  mutable rtc::CriticalSection data_cs_;
+  rtc::CriticalSection data_cs_;
   rtc::scoped_ptr<BitrateObserver> bitrate_observer_;
 
   SendStatisticsProxy* const stats_proxy_;
   I420FrameCallback* const pre_encode_callback_;
   PacedSender* const pacer_;
   BitrateAllocator* const bitrate_allocator_;
 
   // The time we last received an input frame or encoded frame. This is used to
   // track when video is stopped long enough that we also want to stop sending
   // padding.
@@ skipping 15 matching lines @@
   bool has_received_rpsi_ GUARDED_BY(data_cs_);
   uint64_t picture_id_rpsi_ GUARDED_BY(data_cs_);
   std::map<uint32_t, int> ssrc_streams_ GUARDED_BY(data_cs_);
 
   bool video_suspended_ GUARDED_BY(data_cs_);
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_VIDEO_VIE_ENCODER_H_