Refactor + enable GN check on video_coding_utility

webrtc/modules/video_coding/qp_parser.cc

 /*
  *  Copyright (c) 2015 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/qp_parser.h"
+#include "webrtc/modules/video_coding/qp_parser.h"
 
 #include "webrtc/common_types.h"
 #include "webrtc/modules/video_coding/utility/vp8_header_parser.h"
 
 namespace webrtc {
 
 bool QpParser::GetQp(const VCMEncodedFrame& frame, int* qp) {
   switch (frame.CodecSpecific()->codecType) {
     case kVideoCodecVP8:
       // QP range: [0, 127].
       return vp8::GetQp(frame.Buffer(), frame.Length(), qp);
     default:
       return false;
   }
 }
 
 }  // namespace webrtc