Refactor + enable GN check on video_coding_utility

webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.cc

 /*
  *  Copyright (c) 2016 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/video_coding/utility/simulcast_rate_allocator.h"
+#include "webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h"
 
 #include <algorithm>
 #include <memory>
 #include <vector>
 #include <utility>
 
 #include "webrtc/base/checks.h"
 
 namespace webrtc {
 
@@ skipping 131 matching lines @@
   BitrateAllocation allocation =
       temp_allocator.GetAllocation(codec_.maxBitrate * 1000, framerate);
   return allocation.get_sum_bps();
 }
 
 const VideoCodec& webrtc::SimulcastRateAllocator::GetCodec() const {
   return codec_;
 }
 
 }  // namespace webrtc