Populate cert_key_types on OpenSSL.

net/socket/ssl_client_socket_openssl.cc

Index: net/socket/ssl_client_socket_openssl.cc
diff --git a/net/socket/ssl_client_socket_openssl.cc b/net/socket/ssl_client_socket_openssl.cc
index d6345f71501d2acc3e20384943045d90ebdfa846..197f66f76f5c21d0892a8998afb04085c0dbf7a9 100644
--- a/net/socket/ssl_client_socket_openssl.cc
+++ b/net/socket/ssl_client_socket_openssl.cc
@@ -512,6 +512,7 @@ void SSLClientSocketOpenSSL::GetSSLCertRequestInfo(
     SSLCertRequestInfo* cert_request_info) {
   cert_request_info->host_and_port = host_and_port_;
   cert_request_info->cert_authorities = cert_authorities_;
+  cert_request_info->cert_key_types = cert_key_types_;
 }
 
 SSLClientSocket::NextProtoStatus SSLClientSocketOpenSSL::GetNextProto(
@@ -616,6 +617,7 @@ void SSLClientSocketOpenSSL::Disconnect() {
   completed_handshake_ = false;
 
   cert_authorities_.clear();
+  cert_key_types_.clear();
   client_auth_cert_needed_ = false;
 }
 
@@ -1426,6 +1428,15 @@ int SSLClientSocketOpenSSL::ClientCertRequestCallback(SSL* ssl,
       OPENSSL_free(str);
     }
 
+    char* client_cert_types;
+    size_t num_client_cert_types;
+    SSL_get_client_certificate_types(ssl, &client_cert_types,
+                                     &num_client_cert_types);
+    for (size_t i = 0; i < num_client_cert_types; i++) {
+      cert_key_types_.push_back(
+          static_cast<SSLClientCertType>(client_cert_types[i]));
+    }
+
     return -1;  // Suspends handshake.
   }