Allow a preconnecting job to a HTTP2 proxy server based on privacy mode

net/http/http_stream_factory_impl_job_controller.h

Index: net/http/http_stream_factory_impl_job_controller.h
diff --git a/net/http/http_stream_factory_impl_job_controller.h b/net/http/http_stream_factory_impl_job_controller.h
index ab829e8fedd809864c14701e9570e644c0e406d6..f43cf716533e6b575c5de5c81f9e89a5654a7df8 100644
--- a/net/http/http_stream_factory_impl_job_controller.h
+++ b/net/http/http_stream_factory_impl_job_controller.h
@@ -6,6 +6,7 @@
 #define NET_HTTP_HTTP_STREAM_FACTORY_IMPL_JOB_CONTROLLER_H_
 
 #include "net/base/host_port_pair.h"
+#include "net/base/privacy_mode.h"
 #include "net/http/http_stream_factory_impl_job.h"
 #include "net/http/http_stream_factory_impl_request.h"
 
@@ -302,6 +303,9 @@ class HttpStreamFactoryImpl::JobController
   // True if an alternative proxy server job can be started to fetch |request_|.
   bool can_start_alternative_proxy_job_;
 
+  // Privacy mode that should be used for fetching the resource.
+  PrivacyMode privacy_mode_;
+
   base::WeakPtrFactory<JobController> ptr_factory_;
 };