Update from chromium https://crrev.com/304586

net/base/net_util.cc

Index: net/base/net_util.cc
diff --git a/net/base/net_util.cc b/net/base/net_util.cc
index b9cf59f1789a910bed6242794417f5592f0694f1..9dcf9dfccac8c82d4856c357ffc9b9c374c330f5 100644
--- a/net/base/net_util.cc
+++ b/net/base/net_util.cc
@@ -9,6 +9,7 @@
 
 #include <algorithm>
 #include <iterator>
+#include <limits>
 #include <set>
 
 #include "build/build_config.h"
@@ -294,6 +295,10 @@ base::string16 StripWWWFromHost(const GURL& url) {
   return StripWWW(base::ASCIIToUTF16(url.host()));
 }
 
+bool IsPortValid(int port) {
+  return port >= 0 && port <= std::numeric_limits<uint16>::max();
+}
+
 bool IsPortAllowedByDefault(int port) {
   int array_size = arraysize(kRestrictedPorts);
   for (int i = 0; i < array_size; i++) {