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

net/http/http_stream_factory_impl_job_controller.cc

Index: net/http/http_stream_factory_impl_job_controller.cc
diff --git a/net/http/http_stream_factory_impl_job_controller.cc b/net/http/http_stream_factory_impl_job_controller.cc
index b9aa8a8132c319e4dd33f17e41c102b9ce15ba56..5a020451f0ab3ee58f2b9c93b700e66fbd1d93f3 100644
--- a/net/http/http_stream_factory_impl_job_controller.cc
+++ b/net/http/http_stream_factory_impl_job_controller.cc
@@ -57,6 +57,7 @@ HttpStreamFactoryImpl::JobController::JobController(
       main_job_is_resumed_(false),
       bound_job_(nullptr),
       can_start_alternative_proxy_job_(false),
+      privacy_mode_(PRIVACY_MODE_DISABLED),
       ptr_factory_(this) {
   DCHECK(factory);
 }
@@ -84,6 +85,8 @@ HttpStreamFactoryImpl::Request* HttpStreamFactoryImpl::JobController::Start(
   DCHECK(factory_);
   DCHECK(!request_);
 
+  privacy_mode_ = request_info.privacy_mode;
+
   request_ = new Request(request_info.url, this, delegate,
                          websocket_handshake_stream_create_helper, net_log,
                          stream_type);
@@ -102,6 +105,8 @@ void HttpStreamFactoryImpl::JobController::Preconnect(
   DCHECK(!main_job_);
   DCHECK(!alternative_job_);
 
+  privacy_mode_ = request_info.privacy_mode;
+
   is_preconnect_ = true;
   HostPortPair destination(HostPortPair::FromURL(request_info.url));
   GURL origin_url = ApplyHostMappingRules(request_info.url, &destination);
@@ -184,7 +189,7 @@ void HttpStreamFactoryImpl::JobController::OnStreamReady(
     const SSLConfig& used_ssl_config) {
   DCHECK(job);
 
-  factory_->OnStreamReady(job->proxy_info());
+  factory_->OnStreamReady(job->proxy_info(), privacy_mode_);
 
   if (IsJobOrphaned(job)) {
     // We have bound a job to the associated Request, |job| has been orphaned.
@@ -380,7 +385,7 @@ void HttpStreamFactoryImpl::JobController::OnNeedsProxyAuth(
 
 bool HttpStreamFactoryImpl::JobController::OnInitConnection(
     const ProxyInfo& proxy_info) {
-  return factory_->OnInitConnection(*this, proxy_info);
+  return factory_->OnInitConnection(*this, proxy_info, privacy_mode_);
 }
 
 void HttpStreamFactoryImpl::JobController::OnResolveProxyComplete(