Renaming Linux security key auth handler

remoting/remoting_host_srcs.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.
 
 {
   'variables': {
     'remoting_host_sources': [
       'host/audio_capturer.cc',
       'host/audio_capturer.h',
       'host/audio_capturer_android.cc',
@@ skipping 204 matching lines @@
       'host/resources_android.cc',
       'host/resources_linux.cc',
       'host/resources_mac.cc',
       'host/resources_win.cc',
       'host/sas_injector.h',
       'host/sas_injector_win.cc',
       'host/screen_controls.h',
       'host/screen_resolution.cc',
       'host/screen_resolution.h',
       'host/security_key/security_key_auth_handler.h',
-      'host/security_key/security_key_auth_handler_android.cc',
-      'host/security_key/security_key_auth_handler_linux.cc',
-      'host/security_key/security_key_auth_handler_mac.cc',
+      'host/security_key/security_key_auth_handler_posix.cc',
       'host/security_key/security_key_auth_handler_win.cc',
       'host/security_key/security_key_extension.cc',
       'host/security_key/security_key_extension.h',
       'host/security_key/security_key_extension_session.cc',
       'host/security_key/security_key_extension_session.h',
       'host/security_key/security_key_ipc_client.cc',
       'host/security_key/security_key_ipc_client.h',
       'host/security_key/security_key_ipc_constants.cc',
       'host/security_key/security_key_ipc_constants.h',
       'host/security_key/security_key_ipc_server.cc',
@@ skipping 111 matching lines @@
       'host/it2me/it2me_confirmation_dialog_chromeos.cc',
       'host/it2me/it2me_confirmation_dialog_proxy.cc',
       'host/it2me/it2me_confirmation_dialog_proxy.h',
       'host/it2me/it2me_host.cc',
       'host/it2me/it2me_host.h',
       'host/it2me/it2me_native_messaging_host.cc',
       'host/it2me/it2me_native_messaging_host.h',
     ],
   }
 }