Refactor + enable GN check on video_coding_utility

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

Index: webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h
diff --git a/webrtc/modules/video_coding/utility/simulcast_rate_allocator.h b/webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h
similarity index 87%
rename from webrtc/modules/video_coding/utility/simulcast_rate_allocator.h
rename to webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h
index 7f54f5cd28390480ab8fcbfbdc55772c3a7a9820..8e7c7927bb95f8d2f54e9e5f2465be11194c1861 100644
--- a/webrtc/modules/video_coding/utility/simulcast_rate_allocator.h
+++ b/webrtc/modules/video_coding/codecs/vp8/simulcast_rate_allocator.h
@@ -8,8 +8,8 @@
  *  be found in the AUTHORS file in the root of the source tree.
  */
 
-#ifndef WEBRTC_MODULES_VIDEO_CODING_UTILITY_SIMULCAST_RATE_ALLOCATOR_H_
-#define WEBRTC_MODULES_VIDEO_CODING_UTILITY_SIMULCAST_RATE_ALLOCATOR_H_
+#ifndef WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SIMULCAST_RATE_ALLOCATOR_H_
+#define WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SIMULCAST_RATE_ALLOCATOR_H_
 
 #include <stdint.h>
 
@@ -48,4 +48,4 @@ class SimulcastRateAllocator : public VideoBitrateAllocator,
 
 }  // namespace webrtc
 
-#endif  // WEBRTC_MODULES_VIDEO_CODING_UTILITY_SIMULCAST_RATE_ALLOCATOR_H_
+#endif  // WEBRTC_MODULES_VIDEO_CODING_CODECS_VP8_SIMULCAST_RATE_ALLOCATOR_H_