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>