diff -up chromium-64.0.3282.119/third_party/webrtc/p2p/base/port.cc.gcc-round-fix chromium-64.0.3282.119/third_party/webrtc/p2p/base/port.cc
--- chromium-64.0.3282.119/third_party/webrtc/p2p/base/port.cc.gcc-round-fix	2018-01-25 12:03:14.696443814 -0500
+++ chromium-64.0.3282.119/third_party/webrtc/p2p/base/port.cc	2018-01-25 12:20:26.446448618 -0500
@@ -10,7 +10,7 @@
 
 #include "p2p/base/port.h"
 
-#include <math.h>
+#include <cmath>
 
 #include <algorithm>
 #include <vector>