Cleanup the preconnect to proxy code and Job controller code

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 f1402bfae2908ed943c496809d2ab0037e74fdcb..fdc2cd6c73cd10b5595765090fb5cb11f8b30eee 100644
--- a/net/http/http_network_session.h
+++ b/net/http/http_network_session.h
@@ -194,6 +194,10 @@ class NET_EXPORT HttpNetworkSession
     // 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;
+
+    // If true, only one pending preconnect is allowed to proxies that support
+    // request priorities.
+    bool restrict_to_one_preconnect_for_proxies;
   };
 
   enum SocketPoolType {