Remove mutable from rtc::CriticalSection members.

webrtc/call/call_perf_tests.cc

 /*
  *  Copyright (c) 2013 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.
  */
 #include <algorithm>
@@ skipping 95 matching lines @@
       }
     }
     // We need two RTCP SR reports to map between RTP and NTP. More than two
     // will not improve the mapping.
     if (ntp_rtp_pairs_.size() == 2) {
       ntp_rtp_pairs_.pop_back();
     }
     ntp_rtp_pairs_.push_front(ntp_rtp_pair);
   }
 
-  mutable rtc::CriticalSection crit_;
+  rtc::CriticalSection crit_;
   RtcpList ntp_rtp_pairs_ GUARDED_BY(crit_);
 };
 
 class VideoRtcpAndSyncObserver : public SyncRtcpObserver, public VideoRenderer {
   static const int kInSyncThresholdMs = 50;
   static const int kStartupTimeMs = 2000;
   static const int kMinRunTimeMs = 30000;
 
  public:
   VideoRtcpAndSyncObserver(Clock* clock,
@@ skipping 622 matching lines @@
     int encoder_inits_;
     uint32_t last_set_bitrate_;
     VideoSendStream* send_stream_;
     VideoEncoderConfig encoder_config_;
   } test;
 
   RunBaseTest(&test);
 }
 
 }  // namespace webrtc