Optimized HostPortPair::ToString and CookieMonster::GetAllCookiesForURLWithOptions.

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 1570bbb5718606e25057f07069b16d194aaaba6f..1550c36f616c258da2fd6c76cf996087ee355042 100644
--- a/net/base/host_port_pair.cc
+++ b/net/base/host_port_pair.cc
@@ -47,7 +47,10 @@ HostPortPair HostPortPair::FromString(const std::string& str) {
 }
 
 std::string HostPortPair::ToString() const {
-  return base::StringPrintf("%s:%u", HostForURL().c_str(), port_);
+  std::string ret(HostForURL());
+  ret += ':';
+  ret += base::IntToString(port_);
+  return ret;
 }
 
 std::string HostPortPair::HostForURL() const {