Make NSSCertDatabase::ListCerts work async on a worker thread.

net/cert/nss_profile_filter_chromeos.h

Index: net/cert/nss_profile_filter_chromeos.h
diff --git a/net/cert/nss_profile_filter_chromeos.h b/net/cert/nss_profile_filter_chromeos.h
index d5ff8186888495c78bf8831a1dd0e1ab4eab194f..45936581aca78f7c5f784ae8d44ba842efa0868c 100644
--- a/net/cert/nss_profile_filter_chromeos.h
+++ b/net/cert/nss_profile_filter_chromeos.h
@@ -2,26 +2,28 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
-#ifndef NET_CERT_NSS_PROFILE_FILTER_CHROMEOS
-#define NET_CERT_NSS_PROFILE_FILTER_CHROMEOS
+#ifndef NET_CERT_NSS_PROFILE_FILTER_CHROMEOS_H_
+#define NET_CERT_NSS_PROFILE_FILTER_CHROMEOS_H_
 
-#include "base/callback_forward.h"
+#include "base/memory/scoped_ptr.h"
 #include "crypto/scoped_nss_types.h"
 #include "net/base/crypto_module.h"
-#include "net/cert/x509_certificate.h"
-
-namespace content {
-class ResourceContext;
-}  // namespace content
+#include "net/base/net_export.h"
 
 namespace net {
 
+class X509Certificate;
+
 class NET_EXPORT NSSProfileFilterChromeOS {
  public:
   NSSProfileFilterChromeOS();
   ~NSSProfileFilterChromeOS();
 
-  // Initialize with slot handles.
+  // Creates new NSSPrfileFilterChromeOS with the same public and private slots
+  // as |this|.
+  scoped_ptr<NSSProfileFilterChromeOS> CreateCopy() const;
+
+  // Initializes with slot handles.
   void Init(crypto::ScopedPK11Slot public_slot,
             crypto::ScopedPK11Slot private_slot);
 
@@ -57,4 +59,4 @@ class NET_EXPORT NSSProfileFilterChromeOS {
 
 }  // namespace net
 
-#endif  // NET_CERT_NSS_PROFILE_FILTER_CHROMEOS
+#endif  // NET_CERT_NSS_PROFILE_FILTER_CHROMEOS_H_