Refactor + enable GN check on video_coding_utility

webrtc/modules/video_coding/utility/simulcast_rate_allocator_unittest.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 <limits>
 #include <memory>
 #include <utility>
 #include <vector>
 
 #include "webrtc/test/gmock.h"
 #include "webrtc/test/gtest.h"
 
 namespace webrtc {
@@ skipping 340 matching lines @@
       allocator_->GetAllocation(kMaxBitrateKbps * 2000, kFramerateFps);
 
   // Fill both TL0 and TL1, but no more.
   EXPECT_EQ(kMaxBitrateKbps, allocation.get_sum_kbps());
   EXPECT_EQ(kTargetBitrateKbps, allocation.GetBitrate(0, 0) / 1000);
   EXPECT_EQ(kMaxBitrateKbps - kTargetBitrateKbps,
             allocation.GetBitrate(0, 1) / 1000);
 }
 
 }  // namespace webrtc