*wip* NSS: handle chromeos system slot.

net/ssl/client_cert_store_chromeos.cc

Index: net/ssl/client_cert_store_chromeos.cc
diff --git a/net/ssl/client_cert_store_chromeos.cc b/net/ssl/client_cert_store_chromeos.cc
index f357797e34b5d18b87766d81eaf1a42452635950..a2d9b56c2dc4f7b76b1b078476b7c5c60cec5138 100644
--- a/net/ssl/client_cert_store_chromeos.cc
+++ b/net/ssl/client_cert_store_chromeos.cc
@@ -63,14 +63,18 @@ void ClientCertStoreChromeOS::DidGetPrivateSlot(
     const base::Closure& callback,
     crypto::ScopedPK11Slot private_slot) {
   profile_filter_.Init(crypto::GetPublicSlotForChromeOSUser(username_hash_),
-                       private_slot.Pass());
+                       private_slot.Pass(),
+                       crypto::ScopedPK11Slot(crypto::GetSystemNSSKeySlot()));
   ClientCertStoreNSS::GetClientCerts(*request, selected_certs, callback);
 }
 
 void ClientCertStoreChromeOS::InitForTesting(
     crypto::ScopedPK11Slot public_slot,
     crypto::ScopedPK11Slot private_slot) {
-  profile_filter_.Init(public_slot.Pass(), private_slot.Pass());
+  profile_filter_.Init(public_slot.Pass(),
+                       private_slot.Pass(),
+                       // XXX pass system slot? add unittests with system slot?
+                       crypto::ScopedPK11Slot());
 }
 
 bool ClientCertStoreChromeOS::SelectClientCertsForTesting(