Support for client certs in ssl_server_socket.

net/socket/ssl_client_socket_openssl.h

Index: net/socket/ssl_client_socket_openssl.h
diff --git a/net/socket/ssl_client_socket_openssl.h b/net/socket/ssl_client_socket_openssl.h
index 9acb728f961b498a06236f0f2af1c8f9fba127af..047113952186daff1c4b87dfe97c800a23346ea9 100644
--- a/net/socket/ssl_client_socket_openssl.h
+++ b/net/socket/ssl_client_socket_openssl.h
@@ -99,6 +99,12 @@ class SSLClientSocketOpenSSL : public SSLClientSocket {
   int SetReceiveBufferSize(int32 size) override;
   int SetSendBufferSize(int32 size) override;
 
+ protected:
+  // SSLClientSocket implementation.
+  void ForceClientCertificateAndKeyForTesting(
+      const scoped_refptr<X509Certificate>& client_cert,
+      scoped_ptr<SSLPrivateKey> client_private_key) override;
+
  private:
   class PeerCertificateChain;
   class SSLContext;