Extend net/base/parse_number.h for parsing of negative numbers, and determining if there was overflo

net/base/host_port_pair.cc

Index: net/base/host_port_pair.cc
diff --git a/net/base/host_port_pair.cc b/net/base/host_port_pair.cc
index 441a35965d8f4fa7e93a8b323d1a4ffca19d1d20..3bdfc5de62c5bf96ce2a4381d291cb97d4718e1d 100644
--- a/net/base/host_port_pair.cc
+++ b/net/base/host_port_pair.cc
@@ -38,7 +38,7 @@ HostPortPair HostPortPair::FromString(const std::string& str) {
   if (key_port.size() != 2)
     return HostPortPair();
   int port;
-  if (!ParseNonNegativeDecimalInt(key_port[1], &port))
+  if (!ParseInt32(key_port[1], ParseIntFormat::NON_NEGATIVE, &port))
     return HostPortPair();
   if (!IsPortValid(port))
     return HostPortPair();