diff -up chromium-61.0.3163.79/content/network/network_service_impl.cc.gcc-nc chromium-61.0.3163.79/content/network/network_service_impl.cc
--- chromium-61.0.3163.79/content/network/network_service_impl.cc.gcc-nc	2017-09-14 11:15:35.138981701 -0400
+++ chromium-61.0.3163.79/content/network/network_service_impl.cc	2017-09-14 11:16:15.874070310 -0400
@@ -90,7 +90,7 @@ NetworkServiceImpl::CreateNetworkContext
       base::MakeUnique<NetworkContext>(std::move(request), std::move(params),
                                        std::move(builder));
   *url_request_context = network_context->url_request_context();
-  return network_context;
+  return std::unique_ptr<content::NetworkContext>(network_context.release());
 }
 
 std::unique_ptr<NetworkService> NetworkServiceImpl::CreateForTesting() {