Support for client certs in ssl_server_socket.

net/socket/ssl_client_socket_nss.h

Index: net/socket/ssl_client_socket_nss.h
diff --git a/net/socket/ssl_client_socket_nss.h b/net/socket/ssl_client_socket_nss.h
index c2393e2bc0d47c33d445ddcf46ef8751a7940281..ef6d8763f4b3777403cb90c4f62a319605d56a41 100644
--- a/net/socket/ssl_client_socket_nss.h
+++ b/net/socket/ssl_client_socket_nss.h
@@ -39,6 +39,7 @@ class CertVerifier;
 class ChannelIDService;
 class CTVerifier;
 class ClientSocketHandle;
+class SSLPrivateKey;
 class TransportSecurityState;
 class X509Certificate;
 
@@ -100,6 +101,9 @@ class SSLClientSocketNSS : public SSLClientSocket {
   // SSLClientSocket implementation.
   ChannelIDService* GetChannelIDService() const override;
   SSLFailureState GetSSLFailureState() const override;
+  void ForceClientCertificateAndKeyForTest(
+      scoped_refptr<X509Certificate> client_cert,
+      scoped_ptr<SSLPrivateKey> client_private_key) override;
 
  private:
   // Helper class to handle marshalling any NSS interaction to and from the