Sign CertificateVerify messages on a background thread.

net/ssl/ssl_platform_key_nss.cc

Index: net/ssl/ssl_platform_key_nss.cc
diff --git a/net/ssl/openssl_platform_key_nss.cc b/net/ssl/ssl_platform_key_nss.cc
similarity index 56%
rename from net/ssl/openssl_platform_key_nss.cc
rename to net/ssl/ssl_platform_key_nss.cc
index a9471e4452301d3e8d3b5eb86bd1b569d2476759..568f4b161e28f9e9d4dd8964abb05f5559ca1589 100644
--- a/net/ssl/openssl_platform_key_nss.cc
+++ b/net/ssl/ssl_platform_key_nss.cc
@@ -2,13 +2,17 @@
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
+#include "net/ssl/ssl_platform_key.h"
+
 #include "base/logging.h"
-#include "net/ssl/openssl_platform_key.h"
+#include "base/sequenced_task_runner.h"
+#include "net/ssl/ssl_private_key.h"
 
 namespace net {
 
-crypto::ScopedEVP_PKEY FetchClientCertPrivateKey(
-    const X509Certificate* certificate) {
+scoped_ptr<SSLPrivateKey> FetchClientCertPrivateKey(
+    X509Certificate* certificate,
+    scoped_refptr<base::SequencedTaskRunner> task_runner) {
   // TODO(davidben): Implement client auth for NSS. https://crbug.com/479036
   NOTIMPLEMENTED();
   return nullptr;