Modify SetAlternateProtocol and HasAlternateProtocol behavior.

net/http/http_server_properties_impl.h

Index: net/http/http_server_properties_impl.h
diff --git a/net/http/http_server_properties_impl.h b/net/http/http_server_properties_impl.h
index 5ff6f48f2562a60d7b8eaa7909b42023b9c6a2a7..7a5441c57fbebffea2432701bead388ae51f67cb 100644
--- a/net/http/http_server_properties_impl.h
+++ b/net/http/http_server_properties_impl.h
@@ -182,6 +182,10 @@ class NET_EXPORT HttpServerPropertiesImpl
   // been marked broken.
   typedef std::map<HostPortPair, int> BrokenAlternateProtocolMap;
 
+  // Return the iterator for |server|, or for its canonical host, or end.
+  AlternateProtocolMap::const_iterator GetAlternateProtocolIterator(
+      const HostPortPair& server);
+
   // Return the canonical host for |server|, or end if none exists.
   CanonicalHostMap::const_iterator GetCanonicalHost(HostPortPair server) const;