replace COMPILE_ASSERT with static_assert in content/

content/renderer/media/webrtc/media_stream_track_metrics.cc

Index: content/renderer/media/webrtc/media_stream_track_metrics.cc
diff --git a/content/renderer/media/webrtc/media_stream_track_metrics.cc b/content/renderer/media/webrtc/media_stream_track_metrics.cc
index d6962c3f91cffd00cdab1589c7a2cb440971c2c2..0ec4444582b1e07b59ce5d465bfb7a6187b69cf0 100644
--- a/content/renderer/media/webrtc/media_stream_track_metrics.cc
+++ b/content/renderer/media/webrtc/media_stream_track_metrics.cc
@@ -389,7 +389,7 @@ uint64 MediaStreamTrackMetrics::MakeUniqueIdImpl(uint64 pc_id,
   base::MD5Digest digest;
   base::MD5Final(&digest, &ctx);
 
-  COMPILE_ASSERT(sizeof(digest.a) > sizeof(uint64), NeedBiggerDigest);
+  static_assert(sizeof(digest.a) > sizeof(uint64), "need a bigger digest");
   return *reinterpret_cast<uint64*>(digest.a);
 }