Implement TLS client auth in the OS X OpenSSL port.

net/net.gypi

 # Copyright 2014 The Chromium Authors. All rights reserved.
 # Use of this source code is governed by a BSD-style license that can be
 # found in the LICENSE file.
 
 # This file is shared between the regular GYP build, the NaCl GYP build, and
 # the GN build. For GN support, it must have no conditionals or anything like
 # that beyond the simple one-level-deep dictionary of values.
 {
   'variables': {
     # Subset of net source files that are compiled for NaCl (net_nacl target).
@@ skipping 97 matching lines @@
       'http/http_vary_data.cc',
       'http/http_vary_data.h',
       'http/transport_security_state.cc',
       'http/transport_security_state.h',
       'socket/client_socket_handle.cc',
       'socket/client_socket_handle.h',
       'socket/client_socket_pool_histograms.cc',
       'socket/client_socket_pool_histograms.h',
       'socket/next_proto.cc',
       'socket/next_proto.h',
-      'socket/openssl_ssl_util.cc',
-      'socket/openssl_ssl_util.h',
       'socket/socket.h',
       'socket/ssl_client_socket.cc',
       'socket/ssl_client_socket.h',
       'socket/ssl_client_socket_openssl.cc',
       'socket/ssl_client_socket_openssl.h',
       'socket/ssl_client_socket_pool.cc',
       'socket/ssl_client_socket_pool.h',
       'socket/ssl_error_params.cc',
       'socket/ssl_error_params.h',
       'socket/ssl_session_cache_openssl.cc',
       'socket/ssl_session_cache_openssl.h',
       'socket/ssl_socket.h',
       'ssl/default_server_bound_cert_store.cc',
       'ssl/default_server_bound_cert_store.h',
       'ssl/openssl_client_key_store.cc',
       'ssl/openssl_client_key_store.h',
+      'ssl/openssl_platform_key.h',
+      'ssl/openssl_platform_key_mac.cc',
+      'ssl/openssl_platform_key_win.cc',
+      'ssl/openssl_ssl_util.cc',
+      'ssl/openssl_ssl_util.h',
       'ssl/server_bound_cert_service.cc',
       'ssl/server_bound_cert_service.h',
       'ssl/server_bound_cert_store.cc',
       'ssl/server_bound_cert_store.h',
       'ssl/signed_certificate_timestamp_and_status.cc',
       'ssl/signed_certificate_timestamp_and_status.h',
       'ssl/ssl_cert_request_info.cc',
       'ssl/ssl_cert_request_info.h',
       'ssl/ssl_client_auth_cache.cc',
       'ssl/ssl_client_auth_cache.h',
@@ skipping 1578 matching lines @@
       'tools/quic/test_tools/quic_test_client.h',
       'tools/quic/test_tools/quic_test_utils.cc',
       'tools/quic/test_tools/quic_test_utils.h',
       'tools/quic/test_tools/server_thread.h',
       'tools/quic/test_tools/server_thread.cc',
       'tools/quic/test_tools/simple_client.h',
       'tools/quic/test_tools/simple_client.cc',
     ],
   }
 }