SPDY: Fix Alternate-Protocol.

net/base/host_port_pair.h

Index: net/base/host_port_pair.h
diff --git a/net/base/host_port_pair.h b/net/base/host_port_pair.h
index ab7f3120de51cb22c871718acdddc718d090a138..547e8982ec50b287a770c99c4bec4860bd876905 100644
--- a/net/base/host_port_pair.h
+++ b/net/base/host_port_pair.h
@@ -11,9 +11,9 @@
 namespace net {
 
 struct HostPortPair {
-  HostPortPair() {}
-  HostPortPair(const std::string& in_host, uint16 in_port)
-      : host(in_host), port(in_port) {}
+  HostPortPair();
+  // If |in_host| represents an IPv6 address, it should not bracket the address.
+  HostPortPair(const std::string& in_host, uint16 in_port);
 
   // Comparator function so this can be placed in a std::map.
   bool operator<(const HostPortPair& other) const {
@@ -22,8 +22,12 @@ struct HostPortPair {
     return port < other.port;
   }
 
+  // ToString() will convert the HostPortPair to "host:port".  If |host| is an
+  // IPv6 literal, it will add brackets around |host|.
   std::string ToString() const;
 
+  // If |host| represents an IPv6 address, this string will not contain brackets
+  // around the address.
   std::string host;
   uint16 port;
 };