Adding a new authenticator which can be used to validate the remote user

remoting/protocol/BUILD.gn

 # 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.
 
 import("//build/config/features.gni")
 
 static_library("protocol") {
   sources = [
     "audio_reader.cc",
     "audio_reader.h",
@@ skipping 141 matching lines @@
     "third_party_client_authenticator.h",
     "third_party_host_authenticator.cc",
     "third_party_host_authenticator.h",
     "token_validator.h",
     "transport.cc",
     "transport.h",
     "transport_context.cc",
     "transport_context.h",
     "v2_authenticator.cc",
     "v2_authenticator.h",
+    "validating_authenticator.cc",
+    "validating_authenticator.h",
     "video_renderer.h",
     "video_stats_stub.h",
     "video_stub.h",
   ]
 
   configs += [
     "//build/config:precompiled_headers",
     "//build/config/compiler:no_size_t_to_int_warning",
     "//build/config/compiler:wexit_time_destructors",
   ]
@@ skipping 120 matching lines @@
     "negotiating_authenticator_unittest.cc",
     "pairing_registry_unittest.cc",
     "port_range_unittest.cc",
     "ppapi_module_stub.cc",
     "pseudotcp_adapter_unittest.cc",
     "session_config_unittest.cc",
     "spake2_authenticator_unittest.cc",
     "ssl_hmac_channel_authenticator_unittest.cc",
     "third_party_authenticator_unittest.cc",
     "v2_authenticator_unittest.cc",
+    "validating_authenticator_unittest.cc",
     "video_frame_pump_unittest.cc",
     "webrtc_transport_unittest.cc",
   ]
 
   deps = [
     ":test_support",
     "//net:test_support",
     "//testing/gmock",
     "//testing/gtest",
   ]
 }