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 6aaf1e16672d65dc753da56ded07c2e90f546a34..97426ef34e703dee286f014609a01bd0d8eb98e4 100644
--- a/net/socket/ssl_client_socket_openssl.h
+++ b/net/socket/ssl_client_socket_openssl.h
@@ -103,6 +103,9 @@ class SSLClientSocketOpenSSL : public SSLClientSocket {
   // SSLClientSocket implementation.
   scoped_refptr<X509Certificate> GetUnverifiedServerCertificateChain()
       const override;
+  void ForceClientCertificateAndKeyForTest(
+      scoped_refptr<X509Certificate> client_cert,
+      scoped_ptr<crypto::RSAPrivateKey> client_private_key) override;
 
  private:
   class PeerCertificateChain;
@@ -313,6 +316,9 @@ class SSLClientSocketOpenSSL : public SSLClientSocket {
   // pinning failure. It is a (somewhat) human-readable string.
   std::string pinning_failure_log_;
 
+  // Used only for unit testing.
+  scoped_ptr<crypto::RSAPrivateKey> client_private_key_;
+
   BoundNetLog net_log_;
   base::WeakPtrFactory<SSLClientSocketOpenSSL> weak_factory_;
 };