Add a ClientKeyStore to allow injection of non-platform keys for TLS client auth.

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 147 matching lines @@
       'socket/ssl_client_socket_pool.h',
       'socket/ssl_socket.h',
       'ssl/channel_id_service.cc',
       'ssl/channel_id_service.h',
       'ssl/channel_id_store.cc',
       'ssl/channel_id_store.h',
       'ssl/default_channel_id_store.cc',
       'ssl/default_channel_id_store.h',
       'ssl/openssl_client_key_store.cc',
       'ssl/openssl_client_key_store.h',
+      'ssl/client_key_store.cc',
+      'ssl/client_key_store.h',
       'ssl/openssl_ssl_util.cc',
       'ssl/openssl_ssl_util.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_cipher_suite_names.cc',
       'ssl/ssl_cipher_suite_names.h',
       'ssl/ssl_client_auth_cache.cc',
       'ssl/ssl_client_auth_cache.h',
@@ skipping 1694 matching lines @@
       'README.md',
       'docs/bug-triage.md',
       'docs/bug-triage-labels.md',
       'docs/bug-triage-suggested-workflow.md',
       'docs/life-of-a-url-request.md',
       'sdch/README.md',
     ],
     'net_docs_output_dir': '<(PRODUCT_DIR)/net/docs',
   }
 }