Delete unneeded includes of deprecated system_wrappers include files.

webrtc/modules/audio_processing/level_estimator_impl.cc

 /*
  *  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.
  */
 
 #include "webrtc/modules/audio_processing/level_estimator_impl.h"
 
 #include "webrtc/base/array_view.h"
 #include "webrtc/modules/audio_processing/audio_buffer.h"
 #include "webrtc/modules/audio_processing/rms_level.h"
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 
 namespace webrtc {
 
 LevelEstimatorImpl::LevelEstimatorImpl(rtc::CriticalSection* crit)
     : crit_(crit), rms_(new RmsLevel()) {
   RTC_DCHECK(crit);
 }
 
 LevelEstimatorImpl::~LevelEstimatorImpl() {}
 
@@ skipping 31 matching lines @@
 
 int LevelEstimatorImpl::RMS() {
   rtc::CritScope cs(crit_);
   if (!enabled_) {
     return AudioProcessing::kNotEnabledError;
   }
 
   return rms_->Average();
 }
 }  // namespace webrtc