Re-land: Only allow HTTP/0.9 support on default ports.

net/http/http_network_session.h

Index: net/http/http_network_session.h
diff --git a/net/http/http_network_session.h b/net/http/http_network_session.h
index 0326e575e7a01e75b6daa402626a4e1f5f81bed1..0ee42aa37cd6b5563832df25cafbbd12d83a86d9 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -192,6 +192,10 @@ class NET_EXPORT HttpNetworkSession
     ProxyDelegate* proxy_delegate;
     // Enable support for Token Binding.
     bool enable_token_binding;
+
+    // Enable HTTP/0.9 for HTTP/HTTPS on ports other than the default one for
+    // each protocol.
+    bool http_09_on_non_default_ports_enabled;
   };
 
   enum SocketPoolType {