Delete unneeded includes of deprecated system_wrappers include files.

webrtc/common_video/incoming_video_stream.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/common_video/include/incoming_video_stream.h"
 
 #include <memory>
 
 #include "webrtc/base/timeutils.h"
 #include "webrtc/base/trace_event.h"
 #include "webrtc/common_video/video_render_frames.h"
-#include "webrtc/system_wrappers/include/critical_section_wrapper.h"
 #include "webrtc/system_wrappers/include/event_wrapper.h"
 
 namespace webrtc {
 namespace {
 const char kIncomingQueueName[] = "IncomingVideoStream";
 }
 
 // Capture by moving (std::move) into a lambda isn't possible in C++11
 // (supported in C++14). This class provides the functionality of what would be
 // something like (inside OnFrame):
@@ skipping 46 matching lines @@
   if (frame_to_render)
     callback_->OnFrame(*frame_to_render);
 
   if (render_buffers_.HasPendingFrames()) {
     uint32_t wait_time = render_buffers_.TimeToNextFrameRelease();
     incoming_render_queue_.PostDelayedTask([this]() { Dequeue(); }, wait_time);
   }
 }
 
 }  // namespace webrtc