Refactor + enable GN check on video_coding_utility

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

 /*
  *  Copyright (c) 2014 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/codecs/vp8/simulcast_encoder_adapter.h"
 
 #include <algorithm>
 
 // NOTE(ajm): Path provided by gyp.
 #include "libyuv/scale.h"  // NOLINT
 
 #include "webrtc/api/video/i420_buffer.h"
 #include "webrtc/base/checks.h"
 #include "webrtc/modules/video_coding/codecs/vp8/screenshare_layers.h"
-#include "webrtc/modules/video_coding/utility/simulcast_rate_allocator.h"
+#include "webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h"
 #include "webrtc/system_wrappers/include/clock.h"
 
 namespace {
 
 const unsigned int kDefaultMinQp = 2;
 const unsigned int kDefaultMaxQp = 56;
 // Max qp for lowest spatial resolution when doing simulcast.
 const unsigned int kLowestResMaxQp = 45;
 
 uint32_t SumStreamMaxBitrate(int streams, const webrtc::VideoCodec& codec) {
@@ skipping 439 matching lines @@
   if (!Initialized() || NumberOfStreams(codec_) != 1)
     return VideoEncoder::ScalingSettings(false);
   return streaminfos_[0].encoder->GetScalingSettings();
 }
 
 const char* SimulcastEncoderAdapter::ImplementationName() const {
   return implementation_name_.c_str();
 }
 
 }  // namespace webrtc