Delete unneeded includes of deprecated system_wrappers include files.

webrtc/modules/video_coding/media_optimization.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.
  */
 
 #ifndef WEBRTC_MODULES_VIDEO_CODING_MEDIA_OPTIMIZATION_H_
 #define WEBRTC_MODULES_VIDEO_CODING_MEDIA_OPTIMIZATION_H_
 
 #include <list>
 #include <memory>
 
+#include "webrtc/base/criticalsection.h"
 #include "webrtc/modules/include/module_common_types.h"
 #include "webrtc/modules/video_coding/include/video_coding.h"
 #include "webrtc/modules/video_coding/media_opt_util.h"
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 
 namespace webrtc {
 
 // Forward declarations.
 class Clock;
 class FrameDropper;
 class VCMContentMetricsProcessing;
 
 namespace media_optimization {
 
@@ skipping 86 matching lines @@
   int64_t incoming_frame_times_[kFrameCountHistorySize] GUARDED_BY(crit_sect_);
   std::list<EncodedFrameSample> encoded_frame_samples_ GUARDED_BY(crit_sect_);
   uint32_t avg_sent_bit_rate_bps_ GUARDED_BY(crit_sect_);
   uint32_t avg_sent_framerate_ GUARDED_BY(crit_sect_);
   int num_layers_ GUARDED_BY(crit_sect_);
 };
 }  // namespace media_optimization
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_VIDEO_CODING_MEDIA_OPTIMIZATION_H_