*wip* NSS: handle chromeos system slot.

net/cert/nss_cert_database_chromeos.h

 // Copyright 2013 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef NET_CERT_NSS_CERT_DATABASE_CHROMEOS_
 #define NET_CERT_NSS_CERT_DATABASE_CHROMEOS_
 
 #include "base/callback.h"
 #include "base/memory/weak_ptr.h"
 #include "crypto/scoped_nss_types.h"
 #include "net/base/net_export.h"
 #include "net/cert/nss_cert_database.h"
 #include "net/cert/nss_profile_filter_chromeos.h"
 
 namespace net {
 
 class NET_EXPORT NSSCertDatabaseChromeOS : public NSSCertDatabase {
  public:
+  // |public_slot| is the NSS software slot for the user.
+  // |private_slot| is the TPM slot for the user (if a TPM is present).
+  // |system_slot| is the system TPM slot (if system TPM slot is enabled).
   NSSCertDatabaseChromeOS(crypto::ScopedPK11Slot public_slot,
-                          crypto::ScopedPK11Slot private_slot);
+                          crypto::ScopedPK11Slot private_slot,
+                          crypto::ScopedPK11Slot system_slot);
   virtual ~NSSCertDatabaseChromeOS();
 
   // NSSCertDatabase implementation.
   virtual void ListCertsSync(CertificateList* certs) OVERRIDE;
   virtual void ListCerts(const NSSCertDatabase::ListCertsCallback& callback)
       OVERRIDE;
   virtual crypto::ScopedPK11Slot GetPublicSlot() const OVERRIDE;
   virtual crypto::ScopedPK11Slot GetPrivateSlot() const OVERRIDE;
   virtual void ListModules(CryptoModuleList* modules, bool need_rw) const
       OVERRIDE;
@@ skipping 13 matching lines @@
   crypto::ScopedPK11Slot public_slot_;
   crypto::ScopedPK11Slot private_slot_;
   NSSProfileFilterChromeOS profile_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(NSSCertDatabaseChromeOS);
 };
 
 }  // namespace net
 
 #endif  // NET_CERT_NSS_CERT_DATABASE_CHROMEOS_