Enable system NSS key slot.

net/ssl/client_cert_store_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_SSL_CLIENT_CERT_STORE_CHROMEOS_H_
 #define NET_SSL_CLIENT_CERT_STORE_CHROMEOS_H_
 
 #include <string>
 
 #include "crypto/scoped_nss_types.h"
 #include "net/cert/nss_profile_filter_chromeos.h"
 #include "net/ssl/client_cert_store_nss.h"
 
 namespace net {
 
 class NET_EXPORT ClientCertStoreChromeOS : public ClientCertStoreNSS {
  public:
+  // Constructs a ClientCertStore that will return client certs available on
+  // the user's private and public slots. If |use_system_slot| is true, certs on
+  // the system slot will also be returned.
   ClientCertStoreChromeOS(
+      bool use_system_slot,
       const std::string& username_hash,
       const PasswordDelegateFactory& password_delegate_factory);
   virtual ~ClientCertStoreChromeOS();
 
   // ClientCertStoreNSS:
   virtual void GetClientCerts(const SSLCertRequestInfo& cert_request_info,
                               CertificateList* selected_certs,
                               const base::Closure& callback) OVERRIDE;
 
  protected:
   // ClientCertStoreNSS:
   virtual void GetClientCertsImpl(CERTCertList* cert_list,
                                   const SSLCertRequestInfo& request,
                                   bool query_nssdb,
                                   CertificateList* selected_certs) OVERRIDE;
 
  private:
-  friend class ClientCertStoreChromeOSTestDelegate;
+  void DidGetSystemAndPrivateSlot(const SSLCertRequestInfo* request,
+                                  CertificateList* selected_certs,
+                                  const base::Closure& callback,
+                                  crypto::ScopedPK11Slot system_slot,
+                                  crypto::ScopedPK11Slot private_slot);
 
-  void DidGetPrivateSlot(const SSLCertRequestInfo* request,
-                         CertificateList* selected_certs,
-                         const base::Closure& callback,
-                         crypto::ScopedPK11Slot private_slot);
-
+  bool use_system_slot_;
   std::string username_hash_;
   NSSProfileFilterChromeOS profile_filter_;
 
   DISALLOW_COPY_AND_ASSIGN(ClientCertStoreChromeOS);
 };
 
 }  // namespace net
 
 #endif  // NET_SSL_CLIENT_CERT_STORE_CHROMEOS_H_