Use per-user nssdb in onc certificate importer

chromeos/network/onc/onc_certificate_importer.h

Index: chromeos/network/onc/onc_certificate_importer.h
diff --git a/chromeos/network/onc/onc_certificate_importer.h b/chromeos/network/onc/onc_certificate_importer.h
index c691f74e823e34382a51dcc9f84218235c25cc08..702d70f9f00ebaf3ea46794f27a2f7f2a017eaf5 100644
--- a/chromeos/network/onc/onc_certificate_importer.h
+++ b/chromeos/network/onc/onc_certificate_importer.h
@@ -14,6 +14,10 @@ namespace base {
 class ListValue;
 }
 
+namespace net {
+class NSSCertDatabase;
+}
+
 namespace chromeos {
 namespace onc {
 
@@ -32,6 +36,7 @@ class CHROMEOS_EXPORT CertificateImporter {
   virtual bool ImportCertificates(
       const base::ListValue& certificates,
       ::onc::ONCSource source,
+      net::NSSCertDatabase* target_nssdb,
       net::CertificateList* onc_trusted_certificates) = 0;
 
  private: